An HIV positive person is said to have developed AIDS when
Correct answer: D. the CD4 count falls below about 200 cells per microlitre and opportunistic infections appear
- A. antibodies against HIV first appear in the blood
- B. the provirus enters the latent phase
- C. reverse transcriptase is detected in the plasma
- D. the CD4 count falls below about 200 cells per microlitre and opportunistic infections appear
Explanation
AIDS is the late clinical stage, defined by the collapse of helper T cell numbers to roughly a fifth of normal together with opportunistic infections or certain cancers. The appearance of antibodies is seroconversion, which happens within weeks of infection and marks only that the person is HIV positive, often with years of good health still ahead. Latency is the long symptom free phase before AIDS, not AIDS itself.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
About AIDS and HIV Infection
HIV is a retrovirus that infects CD4 T lymphocytes and gradually weakens immune function, while AIDS is the advanced syndrome caused by severe immune deficiency. Coverage includes viral transmission, replication, disease progression, opportunistic infections, diagnosis, prevention and the difference between HIV infection and AIDS.
Practise Acellular Life
342 free Acellular Life MCQs from Biology, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Biology questions like this
Biology is on 8 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More AIDS and HIV Infection questions
Which of the following is NOT a route by which HIV is transmitted?
HIV is classified as a retrovirus because it
HIV causes immune deficiency mainly because it infects and destroys
The test most commonly used for the initial screening of a blood sample for HIV infection is
Which infection is a typical opportunistic infection in a patient with AIDS?
Anti retroviral drugs such as zidovudine (AZT) slow the progress of HIV infection by