First slide

AIDS

Question

At which stage of HIV infection does one usually show symptoms of AIDS?

Easy

A

Within 15 days of sexual contact with an infected person
B

When the infected retrovirus enters host cells
C

When HIV damages large number of helper T - Lymphocytes
D

When the viral DNA is produced by reverse transcriptase

Solution

The symptoms are observed in the AIDs patients, when there is drastic fall in number of T lymphocytes.
In HIV replication, the progeny viruses released in the blood attack other helper T-lymphocytes. This is repeated leading to a progressive decrease in the number of helper T lymphocytes in the body of the infected person. During this period, the person suffers from bouts of fever, diarrhoea and weight loss. Due to decrease in the number of helper T lymphocytes, the person starts suffering from infections that could have been otherwise overcome such as those due to bacteria especially Mycobacterium, viruses, fungi and even parasites like Toxoplasma.

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