Fourth-generation HIV testing combines HIV-1 and HIV-2 antibody detection with HIV-1 p24 antigen detection in a single test. The p24 antigen appears earlier than antibodies — often within 2-4 weeks of infection — allowing earlier diagnosis. The combined test also detects the rare HIV-1 group O.
This test is recommended for routine HIV screening in adults, evaluation of suspected exposures, screening during pregnancy, and assessment of patients with HIV-related symptoms. Positive results trigger confirmatory testing to distinguish HIV-1 from HIV-2 and rule out false positives. With effective antiretroviral therapy available, early diagnosis is critical. Sample type is serum or plasma.
We are CLIA certified, the highest level of Medical industry compliance and standards.
Book an appointment