Presentation on theme: "History of HIV First appeared in USA in early 1980’s"— Presentation transcript:
1 History of HIV First appeared in USA in early 1980’s Originated in AfricaThe HIV virus in humans evolved from a virus in these primates:1. Sooty mangabey monkey2. ChimpsThe virus is called SIV:Simian ImmunodeficiencyVirus
2 What is HIV? HIV is an RNA virus HIV infects the T cells T cells help fight off infectionsHIV is a type of “Hidden Virus”
3 HIV or Human Immunodeficiency Virus The four major routes of transmission:Unprotected sex2. Contaminated needles3. Breast milk4. Transmission from an infectedmother to her baby at birthBlood transfusions are not longer a problemHIV or Human Immunodeficiency VirusHIV destroys a part of the immune system.It affects T-cells which are whiteblood cellsThese white blood cells fightviruses, bacteria and help prevent diseases.
4 The 4 major routes of transmission of HIV: 1. Unprotected sex2. Contaminated needles3. Breast milk4. Transmission from an infectedmother to her baby at birth* Blood transfusions are not longer a problem
5 AIDS or Acquired Immunodeficiency Syndrome AIDS is the diseases caused by HIV orHuman Immunodeficiency VirusWhen too many T cells are destroyed by HIV they can no longer fight off infectionsThe individual now has the disease called AIDSPerson can have AIDS for years and not know it. Why is thisdangerous?????Human T lymphocytes (T cells) Magnification 2,600x
6 AIDS and other diseases People with AIDS get other diseases and infections1. Cancer – Kaposi's sarcoma2. Hepatitis C3. Fungal infections4. Bacterial infection5. Non-Hodgkin Lymphoma – blood cancer involving Lymphocytes6. Lung Cancer7. Cancer in the digestive tract
7 AIDS PREVALANCE (Who has AIDS) In 2005 Worldwide:Close to 40 million people worldwide are infectedAlmost 4 million people were infected in 200565% of AIDS victims live in sub-Saharan Africa* 70% of these victims are WOMENClose to 15 million children are orphansdue to AIDSIn the U.S.1 – 1.2 million people have AIDS25% may not even know they are infected
8 Is there a cure for AIDS? Unfortunately NO!!!! But, there are drugs that can stop HIV from causing more damage to the T-cells and the immune system.These are called Antiviral drugsWhat can you do to prevent HIV from spreading?????
9 Human Immunodeficiency Virus or HIV HIV infection.Release of HIV mature virus from a T cell lymphocyteNucleus of T cell: PinkCytoplasm of T cell: PurpleRNA virus, Retroviridae FamilyMagnification: x14,555
10 Electron microscope pictures of HIV HIV infection.Mature virus and budding release of HIV in human lymph tissueMagnification: x14,555Magnification: x17,545
11 Q: Which cells of the immune system does the HIV virus destroys? Review QuestionsQ: Which cells of the immune system does the HIV virus destroys?A: T-CellsQ: What are the 4 major routes of transmission?A: Unprotected sexSharing contaminated needlesBreast milkFrom mother to her unborn babyQ: What is the name of the disease caused by HIV?A: AIDS or Acquired Immunodeficiency SyndromeQ: What kind of a virus is HIV? DNA or RNAA: RNA
12 Q: What happens when too many T cells are destroyed? A: The person gets AIDS and other diseasesQ: Name 3 other diseases or infections that people with AIDScan get?A: Kaposi’s Sarcoma Lung cancer InfectionsQ: Is there cure for AIDS?A: Not at the present time but scientists are workingvery hard. Will you be the scientist who discoversthe cure?????Q: Is there any treatment?A: Yes, antiviral drugs are now available to help patients livelonger lives