HIV virus is the causative organism for AIDS. AIDS begins with HIV infection. People infected with HIV may have no symptoms for 10 years or longer, but they can still transmit the infection to other during this symptom-free period. If the infection is not detected and treated, the immune system gradually weakens and AIDS develops. Acute HIV infection progresses over time (usually a few weeks to months) to asymptomatic HIV infection (no symptoms) and then to early symptomatic HIV infection with CD4 T-cell count below 200 cells/mm3). Almost all people infected with HIV, if not treated, will develop AIDS. A small group of patients develop AIDS very slowly, or never at all. These patients are called nonprogressors, and many seem to have a genetic difference that prevents the virusfrom damaging their immune system. The symptoms of AIDS are primarily the result of infections that do not normally develop in individuals with healthy immune systems. These are called opportunistic infections. People with AIDS have had their immune system damaged by HIV and are very susceptible to these opportunistic infections. Common symptoms are: Chills, Fever, Sweat (particularly at night), Swollen lymph glands, weakness and weight loss.

Write a Note on Hiv. - Biology

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Write a note on HIV.

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HIV virus is the causative organism for AIDS.
AIDS begins with HIV infection. People infected with HIV may have no symptoms for 10 years or longer, but they can still transmit the infection to other during this symptom-free period. If the infection is not detected and treated, the immune system gradually weakens and AIDS develops.
Acute HIV infection progresses over time (usually a few weeks to months) to asymptomatic HIV infection (no symptoms) and then to early symptomatic HIV infection with CD₄ T-cell count below 200 cells/mm³).
Almost all people infected with HIV, if not treated, will develop AIDS. A small group of patients develop AIDS very slowly, or never at all. These patients are called nonprogressors, and many seem to have a genetic difference that prevents the virus
from damaging their immune system.
The symptoms of AIDS are primarily the result of infections that do not normally develop in individuals with healthy immune systems. These are called opportunistic infections.
People with AIDS have had their immune system damaged by HIV and are very susceptible to these opportunistic infections. Common symptoms are: Chills, Fever, Sweat (particularly at night), Swollen lymph glands, weakness and weight loss.