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However, based upon the HIV prevalence rates at most testing centers within the United States, the negative predictive value of these tests is extremely high, meaning that a negative test result will be correct more than 9,997 times in 10,000 (99.97% of the time). The very high negative predictive value of these tests is why the CDC recommends ...
An HIV antibody test usually detects the HIV antibodies within two to eight weeks, but can have a valid negative result for a long as 2 to 6 months after initial infection. Viral load tests can also be used to diagnose HIV infection, especially in children under 18 months born to mothers with HIV, where the presence of maternal antibodies ...
An initial positive result is not a definitive HIV diagnosis, but rather it should prompt the user to seek immediate medical attention for HIV blood tests and follow-ups. [7] [8] A negative result indicates no HIV infection, but the test cannot accurately detect HIV levels when exposure was within the past 3 months. Even then, there can still ...
Reference ranges (reference intervals) for blood tests are sets of values used by a health professional to interpret a set of medical test results from blood samples. Reference ranges for blood tests are studied within the field of clinical chemistry (also known as "clinical biochemistry", "chemical pathology" or "pure blood chemistry"), the ...
Positive results obtained by antibody or PCR testing are confirmed either by a different antibody or by PCR. [30] Antibody tests in children younger than 18 months are typically inaccurate, due to the continued presence of maternal antibodies. [113] Thus HIV infection can only be diagnosed by PCR testing for HIV RNA or DNA, or via testing for ...
Figure 1. Early Symptoms of HIV. The stages of HIV infection are acute infection (also known as primary infection), latency, and AIDS. Acute infection lasts for several weeks and may include symptoms such as fever, swollen lymph nodes, inflammation of the throat, rash, muscle pain, malaise, and mouth and esophageal sores. The latency stage ...
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