Biology Group Presentations: The Immune System
Group 3: Kate, Sarah, Jackie, Kylina
Topic: The effects of HIV on the immune system. Discuss the cause, transmission, and social implications of HIV.
Sarah: The effects of HIV on the immune system
Kylina: The cause of HIV
Jackie: The transmission of HIV
Kate: Social implications of HIV
Social Implications of HIV
What is the difference between HIV and AIDS? http://www.cdc.gov/hiv/resources/brochures/livingwithhiv.htm#q2
HIV is a virus that develops into AIDS. A person can have HIV for a long time before they develop AIDS.
When HIV enters your body it affects the immune system by attacking CD4 cells or helper T-Cells.
Person with a healthy immune system has a CD4 count is 500 to 1800.
Person is diagnosed with AIDS when the CD4 count goes below 200 or if they have HIV with certain diseases such as tuberculosis.
The stages of HIV before it develops into AIDS:
1.
Infection: The virus can copy itself and infect cells before your immune system has time to react. Flu-like symptoms occur.
2.
Response: The body responds to the virus by making antibodies. This is called seroconversion when you move from HIV negative to positive.
3.
No symptoms: Your body moves into a phase where you experience no symptoms, but are still affect, called asymptomatic infection.
4.
Symptoms: You begin to experience some symptoms of HIV such as PCP.
5.
AIDS: It is diagnosed (not a definite way to diagnose AIDS) when you have certain symptoms, infections, and specific test results.

How does HIV/AIDS affect populations?
HIV and AIDS by Region, 2005
Region
Sub-Saharan Africa
Caribbean
Eastern Europe/Central Asia
North America
South/Southeast Asia
Latin America
Oceania
Western/Central Europe
North Africa/ Middle East
East Asia
World
Number of Adults and Children living with HIV or AIDS
24,500,000
330,000
1,500,000
1,300,000
7,600,000
1,600,000
78,000
720,000
440,000
680,000
38,600,000