Life Science

I . IntroductionIn 1981 , a cluster of cases of Pneumocytis pneumonia appeared in the Los Angeles area . This exceedingly rare disease was usually seen only in persons who were immunosuppressed . Investigators soon correlated the appearance of this disease with an unusual intercourse incidence of a rare form of cancer of the strip and stock vessels called Kaposi s sarcoma . The people affected were all young homoerotic manpower , and all showed loss of immune function . By 1983 , the pathogen make the loss of immune function had been identified as a retrocomputer virus that selectively infects certain T cells . This virus is now cognize as human immunodeficiency virus (human immunodeficiency virus HYPERLINK http / vane .questia .com /SM .qst ?act adv contributors Richard 20C 20Stroh man dcontributors Richard 20C 20Strohman Strohman , 2003There have been several theories near the product line of HIV . It is now believed that it arose by play of a virus that had been endemic in some areas of key Africa for many old age . The virus has been found in blood samples preserved from as early as 1959 in several African nations and in EnglandThesis Statement : This investigates why HIV is such a undefeated pathogen and other details that an single(a) should know about HIVII . literature ReviewA . Opportunistic OrganismsAlthough it is convenient to categorize symbiotic relationship by type we must find in mind that at a lower assign certain conditions the relationship can change . For example , self-confidence proper circumstances , a mutualistic organism such as E . coli , can become harmful . E . coli is...If you pauperism to get a full essay, order it on our website: OrderCustomPaper.com

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