Herpes 7 types: symptoms and treatment
Human herpesvirus type 7( HHV-7) is a "young" and therefore still poorly understood representative of the herpesvirus family.It was isolated in 1990 from T-lymphocytes of the donor.According to the structure of the genome and other characteristics, the HHV-7 is very similar to its counterpart - HHV-6.These two viruses are often present in the human body at the same time, and scientists suggest that HHV-7 promotes the activation of HHV-6 and the development of various pathological conditions as a result.
Features of HHV-7
HHV-7 is a lymphotropic virus( affects T-lymphocytes and monocytes) found in blood cells and saliva.In the human body, it can be in a latent( inactive) state for a long time, skilfully deviating from the immune system.
The main way of transmission of HHV-7 is airborne, although it is possible to get infection through the blood and its components. Intrauterine transmission from mother to child for this type of herpes virus is not typical, unlike HHV-6.Recommended reading:
Infection with HHV-7 occurs usually in infancy, so 95% of adults can detect antibodies to this virus in the blood( but the presence of antibodies does not always indicate an active disease).After the primary infection, the virus remains in the body for life.Reactivation usually occurs with a decrease in immunity.
Herpes 7 types: symptoms
Clinical manifestations of HHV-7 infection are very similar to the infection caused by HHV-6, so it is almost impossible to distinguish one from another.
Primary infection of HHV-7, as mentioned above, occurs in childhood. In children, one of the following conditions arises:
- Sudden exanthema( or roseola) is a disease in which a spotty rash appears on the body against a background of elevated temperature.This is accompanied by a reddening of the throat and an increase in the occipital lymph nodes.
- Fever without rash.Fever and febrile convulsions
- Mononucleosis-like syndrome( similar to infectious mononucleosis, which is also caused by a representative of herpesviruses).
In addition, in rare cases, type 7 herpes in children can cause the occurrence of meningoencephalitis, hepatitis and other serious pathologies( this occurs mainly in children with compromised immunity).But often the infection of the HHV-7 can and is completely asymptomatic.
In the following, with the reactivation of type 7 herpes in adults, it can provoke the development of chronic fatigue syndrome.People with immunodeficiencies, as well as those who have undergone bone marrow transplants or other organs( against the background of taking immunosuppressive drugs), reactivation of HHV-7 can do a lot of trouble.This category of patients may develop pneumonia, encephalitis, transplant rejection reactions, etc.The virus itself is also able to weaken the work of immunity, causing the emergence of secondary infectious diseases.
In addition, some scientists suggest that there is a connection between persistence in the body of HHV-7 and the emergence of a number of dermatological diseases: pink and flat lichen.
It is possible that there are much more ailments associated with HHV-7.However, in view of the fact that the virus has been poorly researched and only a small number of people undergo tests to detect this infection, it is extremely rare for doctors to establish a link between the infection of HHV-7 and the development of pathological changes in the body.
The following diagnostic methods are used to detect HHV-7:
- Serological tests( ELISA).
- Qualitative and quantitative determination of the virus in the blood and other material taken from the patient using the PCR method.
- Virological studies( virus growth under artificial conditions on cell cultures).
In Russia, unfortunately, in laboratories can not always carry out such complex diagnostics, only the determination of HHV-7 DNA in the blood by PCR is generally available.
In addition to specific tests for HHV-7 infection, it is desirable to examine the immune system( make an immunogram) so that if necessary, take measures to strengthen immunity.
Herpes 7 types: treatment
There are no drugs that effectively suppress the reproduction of HHV-7 in the human body. Therefore, antiviral treatment regimens for this infection are not developed, and all possible medical care for patients is symptomatic therapy.
Important: is treated only when the virus is active( doctors determine it by laboratory indicators and clinical symptoms).
If the herpes in latent form to carry out any therapy is inexpedient.In such cases, it is better to direct efforts to prevent the reactivation of the virus.To do this, strengthen immunity in all possible ways: to eat right, temper, fully rest, sleep, avoid stress, timely identify and treat diseases that depress the immune system.
Zubkova Olga Sergeevna, medical reviewer, epidemiologist