When the immune system is weakened, the body cannot fight off disease. - PowerPoint PPT Presentation

slide1 n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
When the immune system is weakened, the body cannot fight off disease. PowerPoint Presentation
Download Presentation
When the immune system is weakened, the body cannot fight off disease.

Loading in 2 Seconds...

play fullscreen
1 / 9
When the immune system is weakened, the body cannot fight off disease.
82 Views
Download Presentation
audrey-murphy
Download Presentation

When the immune system is weakened, the body cannot fight off disease.

- - - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

  1. When the immune system is weakened, the body cannot fight off disease.

  2. HIV- Human Immunodeficiency Virus • Causes AIDS • Retro virus (contains RNA) • Attacks Helper T-cells • Came from butchering chimps (mutated SIV)

  3. HIV Structure Protein RNA Capsid Reverse Transcriptase Viral Envelope

  4. HIV Replication

  5. How Do You Get HIV? Transmission • Blood • Semen • Vaginal Fluids • Breast Milk • Not Transmitted • Air • Sweat • Saliva • Insect bites • Tears • Urine

  6. deadT cell T cell activatedB cell antibody HIV HIV infection leads to AIDS • HIV reproduces in and destroys T cells. • Might NOT have symptoms for 10 years! • AIDS victims do NOT die from HIV they die of other diseases

  7. When Helper T-Cell count drops below 200 per mm³ = Acquired Immune Deficiency Syndrome (AIDS)

  8. Treatments • Antiretroviral drugs- reduces HIV in the body • Expensive $$$ • No curebut…March 2013 one child was cured!

  9. HIV/AIDS Statistics (2010) • World 34 million infected (3.4 million children) • USA 1.1 million infected (1 in 5 unaware) • Africa 23 million infected