The causative agent of chickenpox: how do you receive and how dies?
Good day to you, dear visitors of this website. The causative agent of varicella is a very unusual microorganism with an interesting structure. He acts reasonably and logically, thereby attacking the body potential of the media always successful.
To learn how effective to treat a viral disease, you need to examine its causative agent. After reading this article, you will learn all the features of the behavior of Varicella Zoster virus.
Etiology: who provokes chickenpox?
The causative agent is a DNA virus genome of the organism that is classified as «human herpes virus type III». The microorganism included in the genus «Varicellovirus» and belongs to the subfamily «Alphaherpesvirinae».
It can develop only in the human body. Malicious environmental factors and can be affected very adversely.
What killed the provocateur of smallpox in the external environment?
Experts in the field of Microbiology found that the provocateur pox called Varicella Zoster or V-Z (the name in modern taxonomy and classification of the causative agent of the disease was due to the similarity to herpes virus) are killed in the environment due to the following factors:
- ultraviolet sun rays;
- different types of disinfectants;
- a sharp increase and decrease in temperature (this does not apply to room temperature, since it provocateur remains viable for a long time).
Feature of a microorganism is the ability to travel long distances through the air. For example, so he can fly up to twenty meters and move from apartment to another apartment through the ventilation system. By the way, the provoker of varicella volatility is very similar to provocateur smallpox natural.
How is the infection?
Have you ever thought about why the chickenpox occurs mainly in children five to ten years? These kids are very contact. They interact closely with their peers and are almost always present in society.
The immune system have comparatively weak. And for infection a short duration of communication with a carrier of the disease.
The carrier is a sick person. It is contagious not always, fortunately, but only in the last ten days of incubation and in the first five to seven days after the first appearance of watery pimples.
The mechanism of infection V-Z is the aerosol. And the transmission of the disease in the most simplest way — airborne. Sick highlights virions (pathogens) when someone talks, coughs and sneezes.
All the people without a history of such smallpox in the past, vulnerable to infection. The natural immune protection we are not. However, after the illness, she appears and lasts for many years. This is because the human body produces antibodies to the causative agent of V-Z.
What they are looking for doctors in the analysis on antibodies to chickenpox. By the way, a separate article on the analysis you can find on this site. Read it and learn a lot.
The pathogenesis (origin and development) of the virus-provocateur V-Z
Having penetrated into human organism through respiratory ways, a provocateur is attached to the mucosal cells and then accumulates there. Because of this, the first symptom of infection is often a cough. After the accumulation of the virus enters the lymphatic system and blood. Blood it is carried around the body, covers the new site.
Viremia (the presence of pathogenic microorganisms in the blood) is a bright primary symptom is fever. It occurs because our body reacts negatively to the reproductive metabolites of V-Z.
At the end of incubation provocateur V-Z penetrates the skin and mucous membranes. That is where it is localized. The reproduction in skin cells is accompanied by characteristic symptom is the appearance of watery pimples all over my body.
When the pimples dry up in their place appear the crust and then the skin is restored.
What happens to the virus after recovery
In the body after recovery, formed stable immune protection that persists for life. However, with a sharp decrease of immunity can be re-sick.
Provocateur V-Z sometimes remains in the body for life in a latent state. Again, if he aktiviziruyutsya, the media is already not sick with chicken pox and shingles.
Incubation provocateur V-Z
Incubation can take two to three weeks. During this time people are often not aware of the presence of the disease. Smallpox in children can occur even without specific symptoms and is always evolving in the form of light.
But adults will definitely feel the presence of the virus body V-Z in your body, but only at the end of its incubation.
Expressed clinical picture begins to develop only after the appearance of watery rash. By the way, it appears waves. In children the rash gets up earlier than the adults, and not as dramatically. Why adults feel the symptoms of chickenpox brighter than children.
The outcome of the disease
In children the outcome of the smallpox, which provokes the malicious microorganism V-Z, is usually favorable. Complications occur mainly in adults and can be triggered by lack of proper treatment. Adults are always sick with severe forms of the above diseases, which include:
- bullous is on the skin jumped flabby, large blisters with purulent content;
- hemorrhagic — bound vesicles with bloody contents, hemorrhages appear on the skin, nosebleeds;
- gangrenous — Valderice increase, muddy filled with bloody contents, after healing in their place there are black crusts, with inflamed rim.
To avoid such complications, it is better to recover at a young age. If you are an adult without a history of childhood pox Varicella Zoster, is necessary to put an inoculation from her.
I hope the article was clear and interesting. Be sure to sign up for site updates that take place regularly, read and share information with their friends and acquaintances in the social. networks. I wish you good health! Up to new meetings!
Author: Anna Derbeneva (dermatologist)