Virus Diseases

Viruses are smallest microorganisms which cause infectious diseases. Viruses multiply only in live cells. How does this occur? Virus makes the cell it intends to enter produce special virus-alike molecules which form new virus particules which spread to neighbored healthy cells.

The number of viruses increases, gradually they capture more and more cells which leads to disease appearing. Each of body organs may be affected by viruses, thus each vurus disease has its own symptoms and signs. However, all viruses are intracellular pathogens and therefore all methods of treatment of diseases they cause are inefficient. Antibiotics are ineffective in case of viral infection, it means that the duration of disease and its severity depend on organism ability to fight the virus.

One of most seroius methods is prevention of serious virus diseases with the help of vaccination. Most popular classification of viruses is based on their correlation with diseases they cause, for example, viruses that cause such diseases as smallpox, measles, rubella and chickenpox. These diseases spred via blood through whole body very rapidly, and may affect at once several organs including skin (rash).

Other viruses affect only particular organs. For example, viruses of poliomyelitis and rabies damage nervous system. Influenza viruses affect respiratory system, viruses of hepatitis A and B affect liver work. However, this classification is not quite reliable because one and the same virus may damage various organs. For example, herpes catarrhalis may affect lips skin, genitalia or even nervous system. Therefore, today viruses do classify according to their size, shape, structure and mode of reproduction.

Though antibiotics are ineffective to fight viruses, however, there are medications which help to do it. Remember that prevention is the best way to fight virus diseases – try to avoid them, protect yourself and your children from them. Vaccination prevents from entering of particular viruses in the body.

Herpes Zoster

Herpes zoster is a disease resulting from the activation of the virus that stayed in the human body after chicken pox carried earlier. The disease is characterized with fever, general intoxication, pains and vesiculation along sensorial nerves,

Causes

With herpes zoster are diseased people in nervous system of which remains chicken pox virus for life. The disease usually affects older people.

How virus is activated?

Lowered with age immunity or severe diseases may activate chicken pox virus and causes nerves inflammation where the virus lives. Via sensorial nerves virus spreads into skin and mucus membranes where inflammation develops.

Symptoms

The disease starts acutely with increase of body temperature and full-blown burning pains, inch in spots of future rash. Pains appear on spots of affected nerves (often intercostal) and has one-way belting character. Sometimes pains become intolerable, they do increase when touching the skin, movements, cooling. In 3 – 4 days skin on pain spots becomes red and there appear groups with rare bladders filled with transparent liquid which soon becomes turbid. With appearing of cutaneous eruption, pains usually become less intense, but every second patient suffers from these pains for a month. In 3 – 5 days bladders dry up and turn into crusts.

The total duration of the disease is 7 – 10 days. However, in people with significantly lowered immunuty the disease courses more severe and long.

When in process get involved cranial nerves, pains and rash may appear on facial skin, mucus membranes of eyes and nose, earflap or acoustic meatus.

Complications

Almost in 10% of patients with herpes zoster pains in affected area last for more than one month. In some patients pains return back after one year of recovery.

Recognition

The appearing of one-way vesiculation with pains along intercostal space helps to make the diagnosis.

Treatment

It is necessary to start herpes zoster treatment after first disease manifestations (first days of rash appearing). All patients (especially people younger 20 years) must examine in order to find the reasons for immunity lowering.

Preventive measures

Healthy lifestyle.

Genital Herpes

Genital herpes is caused by the agent called herpes simplex virus (HSV). There are two types of herpes virus:

I herpes virus type affects mainly skin and mucous coat of lips, eyes, nose (HSV-1)

II herpes virus type affects mucous coat of genital organs (HSV-2)

However, genital herpes may be developed under the influence of mixed infection of type I and type II.

Ways of transmission:
1. sexual contact with someone who has a genital HSV-2 infection;
2. genital oral contact;
3. autoinfection, when diseased person carries the virus from center of infection on uninfected parts of the body, for example, from face to genital organs;
4. vertical way of transmission is possible when during pregnancy occurs infection of baby from his mother (fetal infection) or during childbirth
5. domestic mode of transmission occurs extremely rarely and is completely excluded if the virus containing the secret dries.

The main source of infection in men is the urogenital tract, and in women - cervical canal.

Course

Infection with the herpes virus does not always cause manifestation of the disease, often it may have hidden character. In this case people do not know they have this virus disease, so they become source of infection for their sexual partner. A characteristic feature of herpes infection is duration of staying of the virus in the body (herpes virus may stay in the body whole life) and predisposition to aggravation. Undercooling, stress, overfatigue, infective disease (influenza, sore throat, respiratory viral infection) may cause aggravation of herpes.

Common manifestation: high temperature, headache, muscle pain, nausea.

Local manifestations occur in vulva area, vesical cervix area, urine. Typical sign is appearing of numerous small bladders with liquid, redness and edema of affected areas. When those bladders do burst, on their spots appear sores which do heal during 2-3 weeks. Along with bladder eruption and sore appearing patient can experience itch, pain, burning, lower abdomen severity.

Diagnostics of herpes infection is based on detecting the virus and its antibodies in the blood and in swabs from affected area.

Genital Herpes Treatment

Treatment takes quite long time. Genital herpes treatment is directed on stoppage of virus reproduction in human body and elevation of body defenses. Remedies acting directly on virus are not still found. Doctors prescribe such medications as Zovirax (Aciclovir), Neovir, specific zoster immunoglobulin. Ointments are used to shorten time for sores healing on affected areas.

In order to rise immunity doctors prescribe immunostimulants and vitamin and mineral complexes.

Taking Zovirax (Aciclovir) during several months helps to prevent recurrence of genital herpes.

Complications caused by herpes virus during pregnancy:

# prematurity or premature birth
# development of fetus abnormalities
# transplacental infection