Herpes blood old infection
Herpes Simplex Herpes infection (HSV) this examination consists of the tests:
- HSV-1 IgG type 1 (HSV1G serum)
- HSV2 IgG type 2 (HSV2G)
This examination provides information about whether an old infection (infected more than 6 months ago) is present and whether it is type 1 cold sores or type 2 genital herpes.
Genital herpes is an STD.
Herpes infections are common. A large minority of
cases involve an initial infection with one of the herpes viruses. After this initial infection, called
primo-infection, the virus remains in the body for life. The virus remains
present in nerve nodes, or ganglia. Due to viral infections, flu, menstruation, illness,
sunburn, stress, etc., the dormant viruses may have the opportunity
multiply and travel through the nerve branches to the skin or mucous membranes to
cause characteristic abnormalities. These so-called reactivations are much more common than
actual (initial) infections.
In most cases, the abnormalities are very characteristic or typical, so diagnosis is not too
difficult. However, there are also atypical manifestations of a reactivation or typical first manifestations in an
A first infection with one of the herpesviruses often occurs without
symptoms or signs
in certain herpesviruses.
With other types of herpesviruses it can be
violent. Reactivations are milder in some species and more severe in others than the
This test detects IgG antibodies to herpes simplex type 1 and type 2
The IgG does rise if it is a systemic flare-up or neurologic pathology.
In local manifestations (e.g., cold sores), the IgG does not rise.
HSV type 1 is found in:
- Herpes labialis (cold sores)
- in the eye (dendritic keratitis)
- in the mouth (gingivostomatitis)
- in skin lesions of the upper half of the body
- in neonatal herpes
- in meningoencephalitis.
HSV type 2 is found in:
- genital herpes
- for skin eruptions of the lower half of the body.
This rule is not absolute. For example, 20% of genital infections are caused by HSV type 1. These rarely recur in contrast to those caused by HSV type 2.
If you have an acute infection, it is better to turn to your family doctor for diagnosis and treatment.
This test only measures infections contracted more than 6 months ago.
If you want to measure a more recent infection or outbreak, you can also order the IgM test: "Herpes blood test First infection".
Pregnant? In certain cases, it can be useful to have a blood test for antibodies against HSV. This will reliably show whether someone has been infected with HSV in the past and with which type(s). This test is useful, for example, if a pregnant woman has a partner who has recurrent genital herpes, but is not familiar with it. In the absence of HSV antibodies, the pregnant woman runs a risk of being infected with HSV during pregnancy and advice should be given to reduce the risk of infection as much as possible. Then order the test: "Herpes blood test antibodies".
If HSV 1/2 IgG is negative, it is not useful to perform a breakdown into 1 and 2. This is only important if HSV 1/2 is measured positive. Then the breakdown is automatically determined to find out whether type 1 or type 2 is positive. This result may take 10 days to come out because splitting type 1 and type 2 is a specialized test.