AP BIOLOGY

THE HUMAN IMMUNE SYSTEM

AIDS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
When a young man was examined in the AIDS center, a positive ELISA result was obtained with HIV antigens. Complaints about the state of health are absent. What can the positive result of ELISA testify?
A
About HIV infection
B
About AIDS
C
About infection of HVB (hepatitis virus B)
D
About the previous AIDS disease
E
About the Persistence of the HVB (hepatitis virus B)
Explanation: 

Detailed explanation-1: -ELISA Test ELISA, which stands for enzyme-linked immunosorbent assay, is used to detect HIV infection. If an ELISA test is positive, the Western blot test is usually administered to confirm the diagnosis.

Detailed explanation-2: -If you test in a community program or take an HIV self-test and it’s positive, you should go to a health care provider for follow-up testing. If you test in a health care setting or a lab and it’s positive, the lab will conduct the follow-up testing, usually on the same blood sample as the first test.

Detailed explanation-3: -30) What is the probability of having HIV, given he tested positive on Elisa the second time as well. The prior probability of anyone having HIV is 0.00148. The true positive rate for Elisa is 93% and the true negative rate is 99%.

Detailed explanation-4: -Enzyme-linked immunosorbent assay (ELISA). This test is usually the first one used to detect infection with HIV. If antibodies to HIV are present (positive), the test is usually repeated to confirm the diagnosis. If ELISA is negative, other tests usually aren’t needed.

There is 1 question to complete.