title: Seroprevalence of Toxoplasma gondii infection among indian people living in Iauareté, São Gabriel da Cachoeira, Amazonas, Brazil.
abstract: The goal of this survey was to estimate the seroprevalence of Toxoplasma gondii infection in Iauareté, a multiethnic Indian community in the upper Rio Negro basin. We carried out a cross-sectional survey (n = 260), in order to obtain serum samples and demographic data. The sample was randomly selected, by family conglomerate analysis. Serodiagnosis was performed by an enzyme-linked immunosorbent assay and indirect immunofluorescence. Prevalence of reactivity was 73.5% (191/260), being higher in the older-age groups, reaching 95.7% (44/46) in the group aged 50 years or more. The majority of seropositive subjects had titers equal to or less than 1:64. Seroprevalence was greater in Indians belonging to the Hupda ethnic group (p = 0.03). According to the present survey, Indian people living in Iauareté have a high prevalence of antibodies to T. gondii. Demographic concentration and urbanization within low sanitation and poor hygiene backgrounds, as well as unfiltered water consumption, may be related to the high frequency of T. gondii seroprevalence observed in the studied area.
authors.affiliation: Laboratório de Doenças Parasitárias, Medicina Tropical, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro, RJ, Brazil.
authors.forename: Márcio Neves
authors.initials: MN
authors.lastname: Bóia
authors.forename: Filipe Anibal
authors.initials: FA
authors.lastname: Carvalho-Costa
authors.forename: Fernando Campos
authors.initials: FC
authors.lastname: Sodré
authors.forename: Gloria Maria Trindade
authors.initials: GM
authors.lastname: Pinto
authors.forename: Maria Regina Reis
authors.initials: MR
authors.lastname: Amendoeira
mesh_terms: D000293:Adolescent; D000328:Adult; D000818:Animals; D001938:Brazil / Q000453:epidemiology; D002648:Child; D003430:Cross-Sectional Studies; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D019084:Fluorescent Antibody Technique, Indirect; D006801:Humans; D007199:Indians, South American / Q000706:statistics & numerical data*; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D016036:Seroepidemiologic Studies; D014123:Toxoplasmosis / Q000175:diagnosis / Q000453:epidemiology*