describe the mechanism of infection by HIV.
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Human immuno deficiency virus (HIV) infection is a viral infection that progressively destroys certain white blood cells and can cause acquired immuno deficiency syndrome (AIDS).
HIV is transmitted through close contact with a body fluid that contains the virus or cells infected with the virus (such as blood, semen, or vaginal fluids).
HIV destroys certain types of white blood cells, weakening the body’s defenses against infections and cancers.
When people are first infected, symptoms of fever, rashes, swollen lymph nodes, and fatigue may last a few days to several weeks.
Many infected people remain well for more than a decade.
About half of untreated people become ill and develop AIDS, defined by the presence of serious infections and cancers, within about 10 years.
Eventually, most untreated people develop AIDS.
Blood tests to check for HIV antibody and to measure the amount of HIV virus can confirm the diagnosis.
HIV drugs (antiretroviral drugs)—two, three, or more taken together—can stop HIV from reproducing, strengthen the immune system, and thus make people less susceptible to infection, but the drugs cannot eliminate HIV, which persists in an inactive form.
HIV is transmitted through close contact with a body fluid that contains the virus or cells infected with the virus (such as blood, semen, or vaginal fluids).
HIV destroys certain types of white blood cells, weakening the body’s defenses against infections and cancers.
When people are first infected, symptoms of fever, rashes, swollen lymph nodes, and fatigue may last a few days to several weeks.
Many infected people remain well for more than a decade.
About half of untreated people become ill and develop AIDS, defined by the presence of serious infections and cancers, within about 10 years.
Eventually, most untreated people develop AIDS.
Blood tests to check for HIV antibody and to measure the amount of HIV virus can confirm the diagnosis.
HIV drugs (antiretroviral drugs)—two, three, or more taken together—can stop HIV from reproducing, strengthen the immune system, and thus make people less susceptible to infection, but the drugs cannot eliminate HIV, which persists in an inactive form.
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Mechanism of HIV Infection.
Once in the body, HIV attaches to several types of white blood cells.
The most important are certain helper T lymphocytes.
Helper T lymphocytes activate and coordinate other cells of the immune system.
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