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Biology 314

What is AIDS ?

Acquired Immune Deficiency Syndrome

Affects immune system

A – people pick it up from other people

Id – breakdown of body’s immune system

S –group of symptoms that indicate disease


Virus – human immunodeficiency virus


Attacks helper T cells

Enters body

recognized as an antigen

Body’s defenses are not successful

May be months or years before symptoms occur

When it does appear

Destroys helper T cells

Can’t fight disease

Diagnosis = AIDS


Like a cold at first

Swollen lymph glands, fever, weakness, weight loss

Develops infections

Cannot overcome

Type of pneumonia

Blood vessel cancer – Kaposi’s sarcoma

Both cause death

Attacks brain

Memory loss, loss of coordination, partial paralysis, mental disorder

How is AIDS spread ?

Sexually transmitted disease

Exchanged of body fluids

Semen, vaginal secretions

Blood to blood contact

IV drug users

Prior 1985 – blood transfusions

During pregnancy to unborn child

Prevention and treatment of AIDS

No sexual contact with a person with AIDS

Use of latex condoms ( US Surgeon General )

Does not eliminate chances

Avoid blood to blood contact

Blood test ID if you have AIDS

Clinic or hospital


Biology and YOU

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