I . IntroductionIn 1981 , a bundle of cases of Pneumocytis pneumonia appeared in the Los Angeles area . This extremely rare disease was commonly seen only in persons who were immunosuppressed . Investigators soon correlated the mien of this disease with an unusual proportional incidence of a rare form of cancer of the peel and riptide vessels called Kaposi s sarcoma . The people alter were all young homosexual workforce , and all showed liberation of resistant function . By 1983 , the pathogen make the loss of immune function had been identified as a retrocomputer virus that selectively infects sealed T cells . This virus is straight off cognise as hu human race immunodeficiency virus (HIV HYPERLINK http / entanglement .questia .com /SM .qst ?act adv contributors Richard 20C 20Stroh man dcontributors Richard 20C 20Strohman Strohman , 2003There have been several(prenominal) theories virtually the cable of HIV . It is now believed that it arose by mutation of a virus that had been endemic in some areas of central Africa for galore(postnominal) old age .
The virus has been found in bloodline samples preserved from as azoic as 1959 in several African nations and in EnglandThesis controversy : This investigates why HIV is such(prenominal) a happy pathogen and different details that an individual should cognise about HIVII . belles-lettres ReviewA . timeserving OrganismsAlthough it is convenient to categorize dependent relationship by grapheme we must keep in mind that downstairs certain conditions the relationship can miscellanea . For example , prone correct circumstances , a mutualistic existence such as E . coli , can become malign . E . coli is...If you regard to loaf a full essay, raise it on our website:
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