J Infect Dis. 1992 Jul;166(1):100-7.

Endemic human T cell lymphotropic virus type II infection among isolated Brazilian Amerindians.

Maloney EM, Biggar RJ, Neel JV, Taylor ME, Hahn BH, Shaw GM, Blattner WA.

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Viral Epidemiology Section, National Cancer Institute, Bethesda, Maryland.

Abstract

Evidence for human T cell lymphotropic viruses (HTLV) was sought in sera and cells collected from adults in 13 isolated South and Central American Indian tribes. Serologic tests identified frequent HTLV-II-like reactivity among the Cayapo and Kraho tribes, who live 330 km apart in Central Brazil. Polymerase chain reaction analyses of viral DNA in cell pellet and plasma fractions confirmed the virus as HTLV-II. Both tribes speak Gé and, at the time of blood collection (1974), subsisted as hunter/gatherers and slash and burn agriculturalists. Further testing of plasma from Cayapo and Kraho of all ages revealed overall HTLV-II prevalence rates of 33.3% and 12.2%, respectively, with increasing prevalence associated with age and female gender. These data reveal for the first time a high prevalence of HTLV-II infection in remote South American Indians with little contact with non-Indians. Thus, HTLV-II is postulated to be an ancient human virus in the New World.

PMID:: 1607683; [PubMed - indexed for MEDLINE]

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