Tuesday, August 18, 2009

AIDS




Kaposi's Sarcoma.
AIDs:-



















Acquired immune deficiency syndrome or acquired immunodeficiency syndrome (AIDS) is a disease of the human immune system caused by the human immunodeficiency Virus (HIV) This condition progressively reduces the effectiveness of the immune system and leaves individuals susceptible to opportunistic infections and tumors. HIV is transmitted through direct contact of a mucous membrane or the bloodstream with a bodily fluid containing HIV, such as blood,semen, vaginal fluid, preseminal fluid, and breast milk.



CAUSES:-


1.Sexual transmission..


2.Exposure to blood-borne pathogens..


3.Perinatal transmission(from mother to child)..


4.Misconceptions (Sexual intercourse HIV can infect only homosexual men and drug users)..



Cell affected: IMMUNITY:-(WBC's)


a)T-Helper cells (T-lymphocyte Cell mediated immunity)........

b)Macrophages,microcytes and B-lymphocyte)..........................

c)CNS Neurones affected................................................................

d)Certain endothelial cells..............................................................

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