Is there a test to detect herpes?

There are tests available for herpes, but sometimes they turn up negative. When there is an obvious discharge or an open sore, a sample of the fluid can be looked under an electron microscope. The test does require extensive preparation of the sample to be looked at under the microscope. In many cases, the test does end up as a negative. Checking for a virus under a microscope is not routine practice.

There is a blood test whereby one can check for antibodies to the virus. When the herpes virus infection is acute, the body’s immune system will react by making antibodies which react towards the virus. These antibodies can be checked in blood.

The blood test is most sensitive when there is an active infection present. When the herpes infection disappears, the antibody levels fall off and are sometimes not measurable. If the blood tests reveals the presence of antibodies, than it means you may have either oral or genital herpes. If the is negative, it simply means that you may have the virus, but the levels of antibody are too small to be detected. In other words you do not have an acute infection at the moment.