Brazil. 1  Campestre, Alagoas. 2  Campestre, Minas Gerais. 3  Campestre da Serra, Rio Grande do Sul.  Campestre de GoiÃ¡s, 1  GoiÃ¡s. Campestre do MaranhÃ£o, MaranhÃ£o.  Campestre do Menino Deus, Santa Maria, Rio Grande do 1  Sul. SÃ£o JosÃ© do Campestre, Rio Grande do  Norte.
Formal tracking (surveillance) of AIDS cases began that year in the United States. In 1983, scientists discovered the virus that causes AIDS. The virus was at first named HTLV-III/LAV (human T-cell lymphotropic virus-type III/lymphadenopathy-associated virus) by an international scientific committee.This name was later changed to HIV (human immunodeficiency virus).ormal tracking (surveillance) of AIDS cases began that year in the United States. In 1983, scientists discovered the virus that causes AIDS. The virus was at first named HTLV-III/LAV (human T-cell lymphotropic virus-type III/lymphadenopathy-associated virus) by an international scientific committee.
Ever since HIV-1 was first discovered, the reasons for its sudden emergence, epidemic spread, and unique pathogenicity have been a subject of intense study. A first clue came in 1986 when a morphologically similar but antigenically distinct virus was found to cause AIDS in patients in western Africa (Clavel et al.cquired immunodeficiency syndrome (AIDS) of humans is caused by two lentiviruses, human immunodeficiency viruses types 1 and 2 (HIV-1 and HIV-2). Here, we describe the origins and evolution of these viruses, and the circumstances that led to the AIDS pandemic.