Dental caries, looking after smiles, tongue and fresh breathing

Many people across the world are facing teeth decaying and other mouth (oral) conditions. Today we will be looking at dental carries which is normally known as decaying of teeth. This condition does not have age restriction, it affects young and old.

The dental caries

Dental caries involves destruction (decalcification) of teeth outer white layers (enamel). This may further result on destruction of the underlying dentin (the inner part of the teeth). The results is a cavity, which must be cleaned and filled to prevent further erosion of the teeth.

Although the causes of dental carries are not completely understood, lack of teeth cleanliness and a diet high in sugar and starch contribute to the problem.

The microorganisms involved

Accumulation of food particles on the surfaces and between the teeth aid the growth of certain kinds of microorganisms (bacteria to be specific). These bacteria fall under group of Mutans, which is further divided into seven specifically species.

Amongst the seven species, only two specieyare of human beings concern, which are Streptococcus Mutans (S. Mutans) and Streptococcus sobrinus.

These two human concerned oral (mouth) bacteria are activated by the presence of high sugar diet food, which is then convected to sucrose and other bacteria accessory nutrition.

Present of sucrose lead to imbalances of oral pH. The pH imbalances (mineralization and demineralization) lead to the teeth structure being destroyed. This is where caries manifest.

Furthermore, these microorganisms utilize carbohydrates in food particles and produce an abundance of acid by-product an some sticky substances that help keep the bacteria attached to the teeth.

The acids then begin the process of destroying teeth enamel and dentin.

Where is this bacteria coming from?

The oral Streptococcus Mutans/ sobrinus is a normal flora bacteria of the mouth. It live inside human mouth and it is not meant to cause harm.

Some children are born with it from, they acquire the bacteria through genetic transmission (mother to child), it can be transmitted either vertical or horizontal.

Vertical transmission, might involve a new born acquiring an infection during the time a mother giving birth. Horizontal transmission involve acquiring an infection from distance areas, might involve kissing, breast feeding , and from siblings.

Recent research shows that species of Mutans can be cross-transfered between siblings and even from schoolmates. More research is still required on pointing at dental carries as chronic condition.

Prevention of dental caries

Dental caries prevention requires brushing the teeth at least once a day, but recommendations from most dentist point at twice a day.

One can brush the teeth using dental floss or tape regularly to remove debris from between the teeth, and limiting the intake of sugar and starch, especially between meals.

Drinking fluoridated water or applying a fluoride solution to teeth also helps prevent dental decay.

Loosing teeth as a factor

Loss of teeth is most commonly associated with diseases of the gums know as gingivitis and periodontitis, whereas diseases of the dental pulp ( roots of the teeth) is called endodontitis.

Such diseases can usually be avoided by practicing good oral hygiene and obtain regular dental treatment. If not, you can find yourself a home base cleaning equipments to keep your oral health up to normal.

Home base remedy

Most people are now considering to buy themselves hygiene equipments and do their own home based oral cleaning for health reasons.

One of the products is, Electric Sonic Dental Calculus Plaque Remover Tool Kit – Tooth Scraper, Tartar Removal, Cleaner – Teeth Stain Eraser Polisher – Remove Tarter for Kids and adult – 100% Proven Safe Effective (Sky Blue)

Product description/ advantages

Price: $24.99
  • Still have stains tarter on your teeth after dentist appointment? No problem, this tool helps get all of it off
  • Comfortable hold. It reaches all your teeth easily and the power of the vibration is perfect.
  • Easy to Use: Just put it in place and turn on, it’s foolproof.
  • Painless and effective: After use it, your teeth will be noticeably whiter, and free of plaque.
  • Feel like you just left from the dentist! Feel like you just jet a deeper clean!!!

Feel like you just left from the dentist! Feel like you just jet a deeper clean!!! Please Note the following disadvantages: 


1. Be careful around the sensitive gum line when using this oral hygiene tool.

2. For some users it might be a little bit hard to use at the first time, but gradually it will become your must have oral care tools!

3. It doesn’t treate the oral infection, if your teeth are already severely damaged, it won’t help. See a dentist first before use.

4. It doesn’t not remove oral ulcers or tumors around your mouth, the product is for cleaning and keeping clean oral health.

Do you have a stinky breath?

Having a bad smell in your mouth is not a shame but an oral health seeking attention problem. Most people are finding it hard to keep fresh breathing.

Well, the smelling of the mouth is caused by oral bacteria or viral infection around your oral cavity. Some serious infection may include tonsils, nasals, oropharyngeal and other areas around the mouth such as dental cavities.

Food remainders and hard to clean areas around the mouth, including tongue may lead to smelling breath, closing your mouth for a prolonged time and eating unhealthy may be reasons of your bad oral smell.

Here, is the products to use at home with your children, the Eight Horses-T Tongue Cleaner Scraper Surgical Grade Stainless Steel, Tongue Scraping Brush for Oral Hygiene Care Fresh Breath Tongue Scrapers with Carry Case for Adults and Kids,2Pack size.

Product description/ advantages

  • Made of Premium Surgical Grade stainless steel – Non-toxic and Sterilizable – Comfort Grip
  • Fresh Breath Coming- Use stainless steel tongue scrapers to clean any coating thing from the surface to prevent a bad breath, bring the sense of taste and improve digestion
  • Heavy duty gauge to ensure it is smooth on the tongue – no worries about risk of nicks or hurted by the scraper; No Moldy Rubber or PVC Handles – Environmental Stainless Steel Ergonomic handles to ensure bacteria free surface
  • Flexible, non-gagging – Suitable tool for plaque removal, bad breath and to restore oral hygiene or taste sensation.

Are you annoyed with bad breath? Are you always find that you still have oral problem even though you brush your teeth every day?

Why do we need a tongue cleaner?

Our tongue is uneven, and has many grooves and crevices that unclean thing can reside in. Research shows that the tongue accumulates more dirty plaque than other parts of the oral cavity. Especially during sleep, the tongue is coated with a plaque film of dirty and other odor causing compounds.

How to use?

1. Wet your tongue and tongue cleaner with water

2. Extend the tongue as far as possible and with the tongue scraper

reach to the furthest point of the tongue

3. Scrape from the inside out with the stainless scraper

4. Repeat the scraping motion 5-8 times until your tongue is clean

5. Rinse mouth and clean your scraper with water


Oral hygiene is very important part of our health. Before everything happens when we meet people along, we salute them. What come out of your mouth shouldn’t make people uncomfortable.

People at your working space, spouse, children and friends should not take a distance when you talk to them. Seek proper health for your oral issues. 

Teeth decaying is sometimes chronic, it might need more than just a mouth wash, but a dentist appointment and dental treatment. Moreover, home based remedy are also available to make sure that your oral hygiene is spot-on.

Buy relevant, dentist proven products click  here, and more links of different products that are helpful are scarted across this article.

If you need any help, you can easily leave a comment. If you need more clarity or have a question about the website or article feel eto leave me a message or comment below.

With Love doctor


How ovulation lead to female Infertility, prenatal vitamins the solution

Infertiliy is a very sensitive issue or topic. Discussing this hidden behind doors topic is crucial and more awareness need to be published. As much as we discuss global warming and politics, we need more medical education and sexual wellness right on our smart phones. 

Previously we discussed male infertiliy and we introduced infertilaid prenatal vitamins for men, which is available at Amazon stores. 

It is estimated that about 60 percent of infertile marriages are the results of female infertility or female disorders. One of the more common of these disorders is too little secretions (hyposecretion) of gonadotropin hormones. These hormones are from the anterior pituitary glands.

Once these hormones are under secreted, the failure of a female to commence. This failure of ovulating is called an anovulation. This might an indication that something is not right with your monthly periods circle. Don’t wait long see your family doctor. Seek for vitamins boostors such as FertilAid and a lot of female prenatal vitamins.How can anovulation female Infertility condition be detected?

This type of anovulation circle can sometimes be detected by testing the female’s urine for the presence of the pregnanediol. Which is a product of progesterone metabolism.

Since the concentration of progesterone normally rises following ovulation, no  increase in the  urine during the latter part of the menstruation cycle suggest a lack of ovulation.

How to monitor anovulation

The treatment on such a disorder may include the administration of the hormone HCG, which is obtainable from human placentas. As mentioned, this substance has effects similar to those of LH and can stimulate ovulation.

Another ovulatory substance is human menopausal gonadotropin (HMG). The HMG can be obtained from the urine of postmenopausal women. It contains a mixture of LH and FSH. The HMG can further be used to treat females with gonadotropin deficiencies. This deficiency is explained in the introduction of this topic.

However, either HCG or HMG may overstimulate the ovaries and cause many follicles to release egg cells simultaneously, resulting in multiple births later. Multiple births, which can be twins, triplets, and ECT.

Other cause of female Infertility

Another cause of female Infertility is endometriosis, in which tissues resembling the inner lining of the uterus (endometrium) is present abnormally in the abdominal cavities.

Some researchers believe that small pieces of the endometrium may move up through the uterine tubes during menses. These cavities may be implanted in the abdominal cavities.

In any case, once this tissue is present in the cavity, it under goes changes similar to those that take place in the uterine lining during the menstrual cycle. However, when the tissue begins to break down at the end of the cycle, it cannot be expelled to the outside.

Instead it’s products remain in the abdominal cavity where they may irritate it’s lining (peritoneum)and cause considerable abdominal pain. These products also tend to stimulate the formation of fibrous tissue (fibrosis). Thef fbrosis which, in turn may encase the ovary, preventing ovulation mechanically, or may obstruct the uterine tubes.

Other women become infertile as a result of infections, such as gonorrhea, which may cause the uterine tubes to become inflamed and obstructed. The infection may stimulate the production of viscous mucus that can plug the cervix and prevent the entrance of sperm cells.

Solutions to female infertiliy

Solution to the infertiliy is diverse, it depends on the condition a specific woman is under or going through. Take for example a woman who is infertile because of an infection. In this case one can get treated and be cleared of infection, once infection is cleared, now you can take your natural FertilAid for women, which support to aid conception and promote cycle regularity and ovulation.

2. In the case of endometriosis, one can not easily detect that the linings of the womb or uterus are abnormally present in the abdominal cavity. The common signs and symptoms can be pains and irregularities in menstruation cycle.

This may require a medical diagnosis, lab tests, and it is treatable by neams of hormones as explained above, and by excision surgery. Fertilaid for female is not a treatment for endometriosis and fibriosis, it is just a natural booster that aid up conception.

3. It is very important for a woman to always look at what comes out with the urine. During menstrual cycle, notice unusual debris that comes along with urine. Check your tampons often before dumping out. Those are the things that talk to your fertile health.

Women who have previously concieve/ never concieve

The issues might be the same as the one above but, it is very important to further assist your self with natural vitamins such as FertilAid. Eating very healthy and getting enough sleep, eliminating both external and internal stress is very important. Above all, kindly do a positive check up for your ovals or eggs activities.

Women who have done it all and can not concieve, this article is base on promoting good living, recommendations and the use of fertility boosters. If you haven’t try any prenatal boosters. This is your chance of trying natural fertility that promote regular cycle and ovulation, the FertilAid for women. Please consider reading on previous article again, about male infertiliy.

Note: there are many things that can cause one not to concieve, not limited to the one elaborated here. Some women who work extremely hard, with lot of straining objects, this may contribute too. Always look out for external factors too, do not forget to do regular check-up with your family doctor.

Cycle Regularity – The First Step Towards Conception

Getting pregnant involves pinpointing ovulation so that you can plan to have intercourse during your fertile window. Simply put, if you don’t have sex during your fertile window – those 3-5 days just before you ovulate – you can’t get pregnant. 

Knowing when you are ovulating is relatively straightforward when you have regular, predictable 28 day cycles. But, when you have long or irregular menstrual cycles, predicting ovulation is easier said than done, and is sometimes nearly impossible.

FertilAid for Women includes the herbs Vitex and Red Clover Blossom that help to restore hormonal balance and cycle regularity. With more frequent, predictable cycles you will ovulate more often and you will be able to pinpoint ovulation more accurately so that you can be sure to have sex when you are fertile.

Advantages and disadvantages of FertilAid for women

This product is made of vitamins mostly, vitamins and proteins are very good for our health. It goes without saying, that the FertilAid vitamins are good products for quality eggs for conception.

Fertilaid prenatal vitamins can increase the appetite while, promoting conception of which is normal for most of “about to concieve women”. Increase of appetite might be a huge disadvantages to other people. According to research, not much of disadvantages have been notified by customers.


Female infertiliy has been a sensitive issues for years, this is due to a stigma that was built around non concieving ladies. This stigma negative stigma has received a positive response, because we are ashame to speak and send awareness about infertiliy.

It is ok not to have children if both parties have done all they could to concieve. It is ok to seek medical attention and use  of natural FertilAid vitamins and all other products to boost your conception. 

Infertiliy is not supposed to be looked at one side, which is female side. Male too have high chances of being the one who are infertile. Infertiliy comes in many forms, it might be caused by Infection, stress, overworking your body, none ovulation or irregular ovulation cycles or and debris of endometrium tissues.

Keep track of your menstrual cycle, watch the signs and symptoms of endometriosis, take notes of your urine and menstrual blood on your pads.

Use FertilAid for women to boost your conception. Stay healthy and keep medical education alive. This article serve as an awareness. It is open for reviews, and if you have any questions, you are welcome to leave them on the side of comments.

For male Infertility article (click here)

I will Swifty answer you.

Now, Will you consider boosting your pregnancy and conception chances by using natural products? 

Five disorders of joint: arthritis, sprains, bursitis and dislocation

Did you know that joints are subjected to many considerable stress due to several factors? The are used frequently, and they must provide for a great variety of body movements.

Some of them must support body weight. Injuries such as dislocations and sprains occur commonly during strenuous physical activities. In addition, joints may be affected by inflammation as well as by a number of degenerative diseases such as arthritis.

The dislocation

A dislocation (luxation) involves the displacement of the articulating bones of a joint. This condition usually occurs as the result of a fall ( meaning if you happen to fall this disorder may result) or some other unusual body movement.

The joints of the shoulders, knees, elbows, fingers, and jaw are common sites for such an injuries. A dislocation is characterized by an obvious deformity of the joint, some loss of ability to move the parts involved, localized pain, and swelling. It presents a severe physical problem and requires medical attention.

The sprains

Sprains are the result of  overstretching or tearing the connective tissues, ligaments, and tendons associated with a joint, but without dislocating the articular bones. Usually sprains are caused by forceful wrenching or twisting movements involving joints of the wrists or ankles.

For example, the ankle may be sprained if it is inverted  excessively when running or jumping, causing the ligaments on its lateral surface to be stretched. In severe injuries, these tissues may be pulled loose from their attachments.

A sprained joints is likely to be painful and swollen, and movement at the joint may be restricted. The immediate treatment for a sprain is rest; more serious cases require medical attention.

However, immobilization of a joint, even for a relatively shirt period, results in resorption of bone tissue and weakening of ligaments. Consequently, following such treatment, exercises may be needed to help strengthened the joint.

The bursitis

Bursitis is an inflammation of a bursa that may be caused by excessive use of a joint or by stress on a bursa. For example, the Bursa between the heelbone (calcaneus) and the Achilles tendon may become inflamed as a result of a sudden increase in physical activity involving the use of the feet.

Similarly, a form of bursitis called “tennis elbow” involves the bursa between the olecranon process and the skin. Generally, bursitis is treated with rest, although severe cases may need medication.


Arthritis is an infection that lead to a disease condition that causes inflamed, swollen, and painful joints. Although there are several types of arthritis, the most prevalent or common forms are rheumatoid arthritis and osteoarthritis.

1. Rheumatoid arthritis

It is an autoimmune disease and is the most painful and potentially crippling of the arthritic conditions. In this type of arthritis, the synovial membrane of a joint becomes inflamed and grows thicker, forming a mass called a pannus.

This change is usually followed by damage to the articular cartilages of the joint and by an invasion of the joint by fibrous tissues. These tissues interfere increasingly with joint movements, and , in time, they may become ossified so that the articulating bones become fused together (bony avnkylosis).

The rheumatoid arthritis may affect many joints or only a few. It may be accompanied by the development of other disorders, including anemia, osteoporosis, and muscular atrophy as well as abnormal changes in the skin, eyes, lungs, blood vessels, and heart.

Although e mechanism by which joints are damaged in rheumatoid arthritis is not well understood, it seems to involve the presence of certain white blood cells (chronic inflammatory cells, such as lymphocytes and monocytes).

These cells release substances (cytokines) that stimulate osteoclastic activities, which , in turn, can cause destruction of bone tissue.

2. Osteoarthritis (degenerative joints disease)

This is the most common type of arthritis. It occurs ad a result of ageing, as well as certain other factors, and affects a large proportion of the population over fifty years of age.

In this condition, the articular cartilages soften and disintegrate gradually, so that the articular surfaces become roughened. Consequently, the joints involved ate painful, and their movement is somewhat restricted.

The osteoarthritis is most likely to affect joints that have received the greatest use over someone’s lifetime, such as those of the fingers, hips, knees, and the lower regions of the vertebral column.

Other factors that seem to increase the chances of developing osteoarthritis include joint injuries, excess body weight, and certain metabolic disorders.

As a rule, osteoarthritis develops relatively slowly, and its symptoms may be controlled by medication. In !ore severe cases, joints functions are disrupted, and parts of joints may need to be replaced surgically.

If you happened to feel severe pain and loss of knee joint function as a result of rheumatoid arthritis or osteoarthritis. You need to receive a knee replacement.

During this surgical procedure called total knee atthroplasty, the damage surfaces of the distal femur are removed and replaced with a smooth surface metallic device.

Similarly, the proximal surface of the tibia is removed and replaced by a device consisting of low friction polyethylene attached to a metal plate. The metallic parts of these devices are connected to the bones by means of pegs, screws, or bone cement.

Obesity and athletic activities

In addition to causing fractures, the excessive mechanical stress due to obesity or certain athletic activities may damage the articular cartilage of various joints and cause it to deteriorate. Joints that are subjected to the repeated overloading, as in the elbows of a baseball pitcher or the knee of a basketball player, are likely to develop the degenerative joint diseases called osteoarthritis.

Although degeneration of the cartilage may be reversed when joints movements are resumed, it is important to avoid exercises that cause excessive compression of the tissue during the period of regeneration. Otherwise, further injuries may occur and the repair process may be hindered.


The joints disorders are not just restricted to a certain group of people age. It is a disease that is cause by an infection sometimes but yes age matter.

To correct problems caused by joint injuries or diseases, it is sometimes desirable to replace e articulating parts with artificial (prosthetic) devices.


The virus is a set of gene. Typical viruses multiplication cycle is divided into six phases: 1. Absorption to the human cell, which is referred to as host cell; 2. Penetration or entry to the human cell; 3. Uncoating to release the genomes; 4. Viruses or virion components production; 5. Assembly; and 6. Released from the human cell.

This series of events, sometimes with a slightly variation. The viral infection of the cells may be productive (lytic response) or nonproductive (no response).

The outcome of an infection depends on the particular virus-host combination. This means, it depends on the relationship, the viruses have with our body cells.

The viruses need to undergo only one stage between the productive and nonproductive. This kind of viruses are called virulent virus or angry virus.

Those viruses that can undergoes both productive and nonproductive, are referred to as temperate viruses. Some of the temperate viruses can be reactivated or induced to leave a latent state (sleeping state), and they enter to a productive state or virulent stage.

The remainder of this article is concerned with the details of the steps of the virulence state. The next article will jump to routes of infectious diseases transmission.


The first steps for viruses to multiply in any viral infections is the attachment known as adsorption of the infecting particles to the surfaces of the cell.

The prerequisites for this interaction is a collision between the virus and the human cell. Only a small fraction of the collisions between a virus and its host cell lead to a successful infections.

The viruses need to have attachment proteins known as receptors. These receptors are more similar to human fingers and hands for grabbing. This is because the virus uses these receptors to attach on human cell.

You still remember enveloped and naked viruses

All enveloped viruses that are causing diseases in humans, contain the attachment proteins which are receptors. Some of the viral receptors are also found on human red blood cells of certain species. Such receptors are responsible for hemagglutination.

The particular kind of a virus is capable of inflecting only a limited spectrum of of cell types called its host range. This kind of cell host range is very important in determining the pathology of the infection ( the steps in which the virus under go in order to cause an infection).

The entry and uncoating

Once the virus has attached on the human cell, penetration which is the entry into the inside of the cell, the virus is no hidden from the immune system.

The uncoating stage happens simultaneously with the entry or may happened in series of steps. Here we will discuss two type of viral entry and uncoating.

1. The enveloped human viruses

Two basic mechanisms for the entry of an enveloped human viruses into the cell. Both of the mechanisms involve fusion of the viral envelope with a cellular membrane, and the release of the free nucleic capsid into the cytoplasm.

The envelopes of these viruses contain protein spikes (hands finger like) that promote fusion of viral envelopes with the plasma membrane of the cell, releasing e nucleic capsid directly into the cytoplasm.

2. The naked capsid human viruses

Viruses may undergoes dissolution, getting dissolved by binding on the human cell membrane or skin. The nuclei acid is directly deposited to the targeted sites. Now let get to refresh our understand, that viruses are separated into RNA viruses and DNA viruses.

So, most RNA viruses replicate or multiply on the cytoplasm, with the exception of influenza virus (flue) and the retrovirus (HIV). Influenza virus, retrovirus, and other DNA viruses except poxvirus replicate or multiply in the nucleus of the human cell.

Genomic structures replication (multiplying)

The human cells obviously contain the enzymes and tons of protein accessories required for the replication of the DNA.

The smallest DNA viruses like parvovirus, they depends on the infected human cell so that if that infected cell divide thus the virus divide too.

This also occurs with some of RNA viruses, the good example of this kind is HIV. That is the reason why it is not easy to clear or eliminate it. Topic on HIV will be discussed in depth later.

Assembly of viral particles

Remember that we said one human cell is infected by a virus and human cells are naturally multiplying by division. So now the virus is inside the cell that is prone to multiply by division.

The genomes of the viruses and that of the human cell are now one (integrated), the first thing to divide is the cytoplasm, which is a fluid inside the cell. Followed by the nucleus inside the cell. Once all of this is done.

The overall cell divides with the the virus in it. So now more of the infected human cells are thus produced.

Assembly stage the place when each of the new cell’s proteins are coming together to make new infected cells. Note: it is not simple as in this generalization to describe this phenomenon.

Release of new viruses

Once the viral particles have been assembly, now new baby viruses causing infection and diseases are ready to be released from the mother host cell.

This all happens by escape from the infected cell through coding for enzymes that lysis the cell. These enzymes weaken the cell wall by cleaving specific bonds in peptidoglycan layer. The weakened cells burst as a result of the osmotic pressure.

Human viruses are furthermore released as follows:

1. Cell death

The mother infected cell or host infected cell dies after giving birth to the new infected cells or viruses.

Presumably because the viral genetic program is dominant and precludes the continuation of normal cell functions required for survival.

The naked capsid human viruses lack specific mechanisms for lysing the infected cell and apparently are released into the extracellular milieus simply as a consequence of cell death.

2. Budding

With the exception of other viruses, all enveloped human viruses acquire their membrane by budding either through the plasma membranes. In the case of herpes viruses, ultimately escape from the cell after budding through nuclear membrane is unclear (more research is required).

For viruses that bud, it is important to note that the plasma membranes of the infected cells contains virus-specific glycoproteins that represent foreign antigens. This means your infected cells become the target of your own immune system.


Protection from viral infection is to be accomplished at the level of antibodies binding to the viruses, it must occur before adsorption and prevent viruses from attaching to and penetrating our cells.

Most enveloped viruses acquire an envelope during released by budding. Retroviruses except HIV reproduce without cell death.

Sources and communicability of infectious diseases

The spread of diseases is essential to all medical personnel, whether their work is with the individual patient or with the community. Most infections must be evaluated in their epidemiological settings.

For example, has the patient recently traveled to an area of special disease prevalent? Is there a possibility of nosocomial infection ( infection that you acquired as you enter the hospital doors either ad a visitor or as an admitted patient) from recent hospitalization? What is the risk to the patient’s family, schoolmates, and work or social contacts?

Infectious diseases of humans may be caused by exclusively human pathogens/ microorganisms, such as the Measles viruses, by environmental microorganisms such as Legionella pneumophila,or by microorganisms that have their primary reservoir in animals such as the plague bacillus.

They can generally be classified as noncommunicable or communicable.

Noncommunicable infections

Noncommunicable infections are those that are not transmitted from human to humans and include:

1. Infections derived from the patient’s normal flora or microflora such as peritonitis after rupture of the appendix;

2. Infections caused by the ingestion of preformed toxins, such as Botulism; and

3. Infections caused by certain microorganisms found in the environment, such as Clostridial gas gangrene.

Some zoonotic infections (diseases transmitted from animals to humans), such as Rabies and Brucellosis, are not transmitted between humans but others such as plague may be at certain stages.

Noncommunicable infections may still occur as common source outbreaks, such as food poisoning from an enterotoxin producing Staphylococcus aureus contaminated chicken salad or multiple cases of pneumonia from extensive dissemination of Legionella through an air conditioning system.

As these diseases are not transmissible to others, they do not lead to secondary spread.

Communicable infections

Communicable infections are transmissible from one person to the next person. They can be endemic, which simple means that the diseases are present at a low but fairly constant level, or epidemic, which now involves a level of infection above that usually found in a community or population.

Communicable infections may be widespread in a region and sometimes world wide with a high attack, in which case they are termed pandemic. A communicable infection requires that microorganisms to be able to leave the body in a form that either is directly infectious to others or is able to become so after development in a suitable environment.

An example of direct communicability is the respiratory spread of the Influenza viruses. In contrasts, the Malarial parasite requires a developmental cycle in a biting mosquito before another human being can be infected.

Infections and diseases

Infections involves multiplication of the microorganisms in or on the host and can be inapparent, for example, during the incubation period.Diseases are represented by a clinical apparent response by or injury to the host as a result of infection.

With many communicable microorganisms, infection is much more common than diseases, and apparently healthy infected individuals play an important role in disease propagation. Inapparent infections ate termed subclinical, and the individual is sometimes referred to as a carrier.

The latter term is also applied to situations in which an infectious agent establishes itself as part of a patient’s microflora or causes low grade chronic disease after acute infection. 

For example, the clinical inapparent presence of Staphylococcus aureus in the anterior nares is termed carriage, as is a chronic gallbladder infection with Salmonella typhoid that can follow an attack of typhoid fever and result in fecal excretion of the microorganisms for years.

With some infectious diseases, such as measles, infection invariably accompanied by clinical manifestations of the disease itself. These manifestations facilitate epidemiologic control, because the existence and extent of infection in a community are readily apparent.

Microorganisms associated with long incubation periods or high frequencies of subclinical infections like HIV or Hepatitis B viruses may propagate and spread in a population for long periods before the extent of the problem is recognized. This makes communicability control more difficult.

The incubation period and communicability

The incubation period is the time between exposure to the microorganisms and appearance of the first symptoms of the diseases.

Generally, microorganisms that multiply rapidly and produce local infections, such as Gonorrhea and influenza , are associated with short incubation periods (eg.2-4 days).

Diseases such as typhoid fever, which depends on hematogenous spread and multiplication of the microorganisms in distant target organs to produce symptoms, often have longer incubation periods.

Some diseases have even more prolonged incubation periods because of slow passage of the infecting microorganisms to the target organ, as in rabies or slow growth of microorganisms such as that of Tuberculosis.

Incubation periods for one agent may also vary widely depending on route of acquisition and infecting dose. For example, the incubation period of hepatitis B virus infection may vary from 7 to more than 200 days.

Communicability of a disease in which the microorganism is shed in secretions may occur primarily during the incubation period. In other infections the disease course is short but the microorganisms can be excreted from the host for extended periods of time.

In yet other cases, the symptoms are related to the host immune response tether than the microorganisms action, and thus the diseas process may extend far beyond the period in which the etiologic agent can be isolated or spread.

Some viruses can integrate into the host genomes or survive by replicating very slowly in the presence of an immune response.

Such dormancy or latency is exemplified by the Herpesviruses, and in each case the microorganisms may emerge long after the original infection and potentially infect others.


The inherent infectivity and virulence of microorganisms are also important determinants of attack rates of diseases in a community.

In general, microorganisms of high infectivity spread more easily and those of greater virulence are more likely to cause diseases than subclinical infection.

The infecting dose of the microorganisms also varies with different microorganisms and thus influences the chance of infection and development of a disease

Genomic structures: viruses causing infection and diseases

From previous page posted, we introduced the meaning of viruses, their sizes and design . Now on the next topic we will be looking at genome structure, of which is the one that make viruses very difficult to respond very well on treatment or get cleared from our system.

Viral genomics structure

Structural diversity among the viruses is the most obvious, when the make-up of the viral genomes is considered. Genomes can be made of ribonucleic acid (RNA) or deoxyrionucleic acids (DNA) and be either double stranded or single stranded.

For viruses with single-stranded genomics, the nucleic acid can be either of the same polarity (indicated by a + or – for a different polarity) from that of the viral messenger-RNA (mRNA) produced during the viruses causing infection and diseases.

Two types of genomics structure are known, the linear and the circular. Most viruses have a single nucleic acid molecules for their genomics structures, in some cases several pieces of nucleic acid constitute the complete genome.

Viruses as such have segmented genomes. One virus class which is retrovirus (e.g.HIV) carries two identical copies of its genomics structures and is therefore diploid.

This is what is rarely and complicated about HIV. A few viral genomes such as picornaviruses, hepatitis B virus, and adenoviruses contain covalently attached protein on the ends of the polynucleotide chains.

Viral genomics subunit structure of Capsids

The capsid of all viruses are composed of many copies of one or at most several kinds of protein subunits.This fact follows from:

1. All viruses code for their own capsid proteins, and it turns out that even if the entire coding capacity of the genomics structures were to be used to specify a single giant capsid protein, the protein would not be large enough to enclose the nucleic acid genomes.

This lead to multiple protein copies required. The simplest spherical virus contains 60 identical protein subunits.

2. Viruses are such highly symmetric structures that it is not uncommon to visualize naked capsid viruses in the electron microscope as a crystalline arrays.

The presence of many identical protein subunit in viral capsids or the existence of many identical spikes in the membrane of enveloped viruses has important implications for adsorption, hemagglutination, and recognition of viruses by neutralizing antibodies

Viruses genomics cylindrical shape

A cylindrical shape is the simplest structure for a capsid. The first virus to be crystallized and studied was a plant virus, which is tobacco mosaic virus (TMV).

The capsid of a TMV is shaped like a rod or, a cylinder, with the RNA genomics structure wound in a helix inside it. The capsid is composed of many copies of a single kind of protein subunit arranged in a closed packed helix, which places every subunit in the same microenvironment.

Because of the helical arrangement of the subunits, viruses that have this type of design are often said to have helical symmetry. Thus, the nucleocapsids of influenza, measles, mumps, rabies, and poxviruses are probably constructed with a helical arrangement of protein subunit in close association with the nucleic acid genomics structures.

The viruses genomics spherical shape

Construction of a spherical shaped virus similarly involves the packing together of many identical subunits, but in case the subunits are placed on the surface of a geometric solid called an icosahedron.

Because the icosahedron belong to the symmetric structural group, the spherically shaped viruses are said to have cubic symmetry (note that the term ‘cubic’, used in these contexts, has nothing to do with the more familiar shape called cube).

When viewed in the electron microscope, many naked capsid viruses and some nucleocapsids appear as spherical particles with a surface topology that makes it appear that they are constructed of identical ball-shped subunits.

These visible structures are referred to as morphological subunits. Morphological subunits are composed of either five or six individual protein molecules, each one referred to as a structural subunit, or promoter.

In the simplest case of a virus with a cubic symmetry, I’ve promoters are placed on each 12 vertices of the icosahedron forming a pentamer. While, the capsid is composed of a total of 60 promoters.

This arrangement places every promoter in the same microenvironment as every other promoter in the case of helical symmetry.To accommodate the larger cavity required by viruses with large genomics structures, the capsid’s contain many more promoters.

These viruses are based on a variation of the basic icosahedron in which the construction involves a mixture of pentamers and hexamers instead of only pentamers. A detailed description of is higher level of virus structure is beyond the scope of this text.

Special surface genomics structures

Many viruses have structures that protrude from the surface of the virion. These genomics structures are important for the two earliest steps of infection, adsorption, and penetration.

The examples of the surface structure include the spikes of adenovirus and the glycoprotein spikes found in the membrane of enveloped viruses.

Even viruses without obvious surface extensions probably contain short projections, which is more of the obvious spikes, are involved in the specific binding of the virus to the cell surface.

Classification of viruses causing infection and diseases in human

Table 1 Represent classification of RNA and DNA human viruses causing diseases

Table 1.

Table 1 present a classification scheme for human viruses that is based solely on their genomics structure. The viruses are arranged in order of increasing genomics structural size.

It is important to bear in mind that phylogenetic relationships cannot be inferred from this taxonomic scheme. The tables should not be memorized, but instead used as a reference guide to viruses structures.


The terminal protein molecules as well as other special genomics structures found in other viruses play key roles in the replication process.

In general, viruses with similar genomics structures exhibit similar replication strategies.

See the next article, where we will be discussing viruses multiplication, viral infection of cells may be productive or none productive, animal viruses may cause oncogenic transformation.

Microorganism the cause of infection leading to a disease

People get sick and die because of microorganisms. What are microorganisms? Microorganisms are normally known as germs in simple english.Microorganisms can not be seen by our necked eyes, we can only see them by the use of a microscopy.

When we talk of microorganisms, we simple talk about bacteria, viruses, fungi, and others .

Microorganisms can be classified as bad and good. We have good microorganisms, that are used in our food, medicine and cleaning materials. We can also find very bad microorganisms that make humans, plants and animals sick. 

Where can microorganisms be found?

Microorganisms can be found everywhere, all over human skin; inside ones mouth, and nose; sexual organs (private parts); inside the stomach and intestine; on our hands; food we eat; soil, air, and water.

Good microorganisms that are found as normal micro flora in our body, have an ability to harm us. Remember our body are made of sterile environment and none sterile environment.

So if the harmful microorganisms get access to the sterile part of our body such as blood circulatory system, that is where a person is defined as infected by microorganisms. At that stage it is not a diseases, it is just an infection.

What is an infection? An infection is defined by the present of a bacteria or any other microorganisms being a foreigner or an antigen in our body, where now antibodies which are normal known as body soldiers or defense system recognises antigens.

Human body defend itself from microorganisms

Human bodies are made of defense mechanism which is immune system. Immune system consists of antibodies and a lot of immune cascades which we are not going to talk about in this posts.

Our skin, mouth, eyes, noise, vagina and penis possesses first layer of defense mechanisms. Skin itself is our first protector/ barrier from foreign microorganisms. If the first immune barrier fails or over powered by microorganisms.

The second defense barrier which are antibodies come on board. If the antibodies fails too, that is where infection manifest leading to a disease. 

A broader discussion on immunology will cover this part of antibodies or immune system as a whole.

Microorganisms cause infections and diseases

Once the immunity fail to defend the body from these very bad microorganisms, the sickness begins. Once a person shows signsvand symptoms, it is when we use a term called disease.

A disease can be infectious or none infectious. The infectious diseases are caused by microorganisms such as viruses, very bad bacteria, very bad fungi and parasites.

Microorganisms that cause diseases are called pathogens. Pathogens have an ability to cause to cause infections that lead to diverse diseases. 

For detailed information on viruses see Genomic structures: viruses causing infection and diseases

Microorganisms can enter the body through the four sites such as respiratory tract (mouth and nose) e.g. influenza virus that causes the flu. Gastrointestinal track (mouth oral cavity) e.g. vibrio cholerae which causes cholera.

Urogenital tract e.g. Escherichia coli which causes cystitis. Sex organs (vagina and penis) e.g. Neisseria gonorrhoeae which causes gonorrhea.

Where can microorganisms reside and multiply

Microorganisms are found every where in our planet and everywhere on/in our body except in sterile environment like blood circulatory system and central nerveous system (CNS).

In none sterile environment such as vagina, penis, anus, mouth, nose and skin, microorganisms can reside and multiply.

Viruses are microorganisms that can only survive and multiply inside leaving cells

Mostly once a virus is inside a human cell, it incorporate it own DNA with that of a human cell to multiply and further infect other neighbouring cells, thus far initiate an infection that later become a disease if not diagnosed and get eliminated or treated early.

Bacterial microorganisms can survive and multiply in any environmental given. Such that, there are bacteria that survive in harsh temperatures, very hot conditions more than a thousand degrees Celsius.

Some bacteria can be found residing and multiplying in very cold environment like negative 80 degrees Celsius. This proves how stubborn are microbes, which is a reason why people, animals and plants succumb from them if not cleared.

A glance on antibiotics

Thousands of companies are manufacturing antibiotics/ antimicrobial such as antivirals, antifungal and others.

Antimicrobials are developed in order to treat, eliminate and monitor infectious microorganisms. Not forgetting that natural human immunity also play a pivotal role in eliminating and clearing microbes in our body systems.

Keeping in mind that antibiotics have side effects, those effect slightly affect human bodies negatively. Our bodies are like motor vehicles, regularly requires services.

Human body services goes along with the use of antimicrobial agents but the over used of antibiotics lead to microbial resistance to them. How microorganisms resist antibiotics, will be discussed in our next topic.

Good microorganisms go bad too

Microbiotas are not all so bad, some bacteria are good for our health but in excess are dangerous. Microorganisms called normal microflora are not that bad, they protect us from so many things.

Take an example of Mutans streptococcus which is mostly found residing in our mouth. It is responsible for keeping pH balance in our oral environment.

By keeping pH balance, our teeth are protected from an automatic demineralization (breaking down). Despite that, we still get oral conditions such as dental caries which are caused by species of Mutans streptococcus, due to our diet imbalance.

Consumption of sucrose rich nutrients lead to super activation of normal flora (Mutans streptococcus species) microorganisms to multiply excessively and uncontrollable. That way oral infection such as dental caries is manifested.

Looking at a female sex canal, it naturally possess a fungi called Candida Albicans, which is a very good microorganisms but but under unbalance pH environment, the fungal infection immerge, which is called Candidiasis.

Candidiasis cause a discharge through the vagina. Which is a very uncomfortable discharge in a woman’s private part. This fungal infection is infectious, it can be transmitted from one person to another via unprotected sexual activities. We will discuss more of sexual transmitted diseases in the next post.

Commercial uses of microorganisms

Microorganisms that are found residing in our body can be used commercially to manufacture food that we love and eat everyday, for example cheese, yogurt etc. This topic will be discussed later.


humans have both good and bad relationship with microorganisms. Good microorganisms are beneficial to human, while bad ones are harming our health. The over use of antibiotics leads to microbes being resistance.

Have it ever cross your mind? The human microorganisms diversity: the offense

Any one can get sick due to many unforeseen reasons. You can come across your own normal flora (get details on the next topic); you can come across microorganisms like infectious bacteria from the air, soil, water, and through other human beings.

We are surrounded by trillions of microorganisms that survive in diverse environment. Some of these microorganisms are good for our health and some are very bad, culprits of our death cause. On the following topics we will discuss the basics of microorganisms diversity.

This will include entry into the microbial world, roles of microorganisms in nature, microbial adaptation to diverse environment, microorganisms that plants interact with and use of microbial diversity by humans.

The entry of microbial into the world

The purpose is to show how diverse are microorganisms

Definition of microorganisms diversity, and how are interconnected with one another.Before birth, all normal infants are protected from the environment by the placental of the mother and her immune system.

Immediately, the unborn child decide to escape the womb, that is where an enormously complex microbial world that had evolved past trillions years ago enters or evade an infant.

Most of these microorganisms are free living but a few have ecological niches in the external, mucosal, and other surfaces of humans and other creatures. Often these microorganisms have a mutual benefit.

Few minority became unwelcome guests on human bodies through the expression of specialized features that give them a capacity to injures thus cause an infection. Understanding how microorganisms cause an infection that lead to a diseases is the major goal of this website.

The role of microorganisms in nature

Microorganisms are defined as  living things that are invisible to the human unaided eyes, can only be seen by the use of microorganisms.

There are responsible for the breakdown and natural recycling of organic material in the environment. Some can fix atmospheric nitrogen and synthesize nitrogen a containing inorganic and organic compounds that contribute to the nutrition of living things that lack this ability.

Some can use atmospheric carbon dioxide as a source of carbon for organic compounds. Others like oceanic algae produce oxygen through their use of atmospheric carbon dioxide for photosynthesis.

Thus , microorganisms play central roles in the nitrogen and carbon cycles and contribute to maintaining the atmospheric oxygen level.

The microbial adaptation to diverse environment

Very few areas on the surfaces of the earth do not supports microbial life.

Microorganisms have amazing range of metabolic and energy yielding ability. Many have an ability to exist under conditions that are lethal to other life forms.

For example, some bacteria can oxidize inorganic compounds such as sulphur and ammonium ions to generate energy. Some  can survive and multiply in hot springs at temperature above 75 degrees Celsius.

Many microorganisms can metabolize only fermentatively. Using substances other than oxygen as terminal electron acceptors, and can thus multiply under highly reduced conditions.

Some of these are callulolytic and can multiply rapidly in masses of decaying vegetation in the absence of oxygen. To many, oxygen is lethal.

The microorganisms that plants interact with

Some microbial species have adapted to a symbiotic relationship with higher forms of life. For example, bacteria that can fox atmospheric nitrogen colonize root systems of legumes.

When the plant dies or is plowed under, the fertility of the soil is enhanced by nitrogenous compounds originally derived from the metabolism of the bacteria. These few examples demonstrate the nature of microbial life and their essential place in our ecosystem.

The use of microbial diversity by humans

The metabolic diversity of microorganisms have led to their application to humans purposes. These uses include alcoholic fermentation in the production of wines and beers.Also the production of complex molecules such as vitamin12 and various antibiotics.

Through the use of recombinant DNA techniques, genes encoding the synthesis of substances such as human growth hormone and some immunologic mediators have been added to the genomes of bacteria, or yeasts, which then synthesize the desired products in the culture.

Because of this relatively simple and manipulable genetic structure, molecular biology studies on bacteria continue to help illuminate the complexities of cellular regulation and differentiation in higher life forms.


To study microorganisms and their role in nature is very interesting and important.

This website, however has a narrower focus since it only concerned with those microorganisms that are directly involved in the maintenance of human health and causation of infection leading to a diseases.

Within this context, we considers the four broad classes of microorganisms that interact with humans: Bacteria, Fungi, Viruses, and Protozoa.

We will then extend our knowledge to include some multicellular parasites, the helminths and fluke, that are macroscopic at some stages of their life cycles.

The bacteria ate generally smaller, simpler and probably more primitive than the fungi. Their nuclear material comprises of a single, double stranded, but very large DNA molecules withouts a structural nuclear membrane.

There are described as prokaryotic and haploid with nontrue sexual mode of reproduction. They possess autonomous self replicating smaller circular DNA molecules, termed plasmid.

An image to show a virus at it active stage of attachment to a human cell
Viruses images

The viruses, are totally different group of infectious agents.

There are strictly intracellular parasites of other living cells.Not only human cells and plants but also for bacteria.

The viruses are simple forms of replication, biological active particles that carry genetic information in either DNA or RNA molecules but never both.

Most matured viruses have protein coat over their nucleic acid and sometimes a lipid surface membrane. Which is derived from the cell that they infect.

They lack the protein synthesizing enzymes and structural apparatus necessary for their own replication. They bear essentially no resemblance to a true eukaryotes or prokaryotic cell.

Viruses replicate by using  their genetically active nucleric acids to subvert the metabolic activities of the cell that they infect to bring about the synthesis and reassembly of their component parts.

A cell infected with the single viral particle may thus yield many thousands of viral particles, which can be assembled almost simultaneously under viral nucleic acid.

See the next publication Genomic structures: viruses causing infection and diseases


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