1. Chapter 30 Lesson 1 HIV AND AIDS

2. HIV AND THE BODY Lymphocytes – white blood cells made in the bone marrow -Human body contains billions of lymphocytes found in blood, spleen, lymph nodes, appendix, tonsils, and adenoids -Help body fight disease

3. 2 major types of Lymphocytes B-cells – which mature in bone marrow T-cells – which mature in the thymus gland T-helper cells help stimulate B-cells to produce antibodies that destroy pathogens Anti bodies- proteins that destroy pathogens

4. How HIV works When HIV enters the bloodstream, it enters certain cells, including T-helper cells HIV reproduces its genetic material in these cells T-helper cells become infected and destroyed Reduces the ability of immune system to fight pathogens

5. How HIV works HIV can be present anywhere in the body Bloodstream, lymph nodes, brain cells

6. How HIV is Transmitted HIV Must enter a persons blood stream in order to infect the person Through exchange of body fluids –Blood –Semen –Vaginal secretions –Breast milk

7. Risk Behaviors Known to Transmit HIV 93% through intercourse or IV drug use Sexual intercourse – can be transmitted through any form of sexual intercourse Sharing needles – Person who is infected injects themselves wit a needle, drops of blood left on the needle, if another person uses same needle very likely to get infected

8. Statistics AIDS leading cause of death in 25-41 year old age group Many in their 20’s probably were infected as teenagers 3,359 cases 13-19 Aids in now the leading cause of death for women in 15 of the largest cities in the U.S.