After HIV infection after 2-4, made a maximum of 12 weeks in blood antibodies (substances) against HIV. These can be detected indirectly by using HIV testing and HIV-antibody tests. The HIV-antibody screening test (ELISA) test has a diagnostic window - the time between infection and detectability of the occurring antibodies - three (3) months. Thus, the test shows only after three months with a high certainty that HIV antibodies were formed in the blood - positive - or not - negative.
A positive result of ELISA (enzyme linked immunosorbent assay) alone is not a safe result for HIV infection. For this reason he is always accompanied by immunoblot (confirmatory test) applied, the erroneous assumptions of infection or false positive results avoided. must be assumed by HIV infection, provided by testing a further sample of the patient, a sample was excluded as the likelihood of failure also - first event of a positive outcome of the search and confirmation test - HIV antibody.
addition to the HIV antibody test is the direct detection (PCR and antigen) are possible. Tests with the antigen-process - searching for viral antigens (P24) - and testing using the PCR method - Search for viral nucleic acids (RNA) -, the HI-virus itself or its components with a smaller diagnostic window - show - a few days. Tests with the PCR method, but only in special cases - in newborns of HIV-infected mothers, blood transfusion, the diagnosis of acute HIV infection or to control therapy - are carried out.
Note
The HIV test is not an''AIDS test''that he can not predict if you are infected with HIV, whether or when you are ill with AIDS. Also considered AIDS-free certificates and negative HIV tests - regardless of whether protected or unprotected Sex practices - not as safe.
0 comments:
Post a Comment