Bóia Márcio Neves, Carvalho-Costa Filipe Anibal, Sodré Fernando Campos, Pinto Gloria Maria Trindade, Amendoeira Maria Regina Reis
Laboratório de Doenças Parasitárias, Medicina Tropical, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro, RJ, Brazil.
Rev Inst Med Trop Sao Paulo. 2008 Jan-Feb;50(1):17-20. doi: 10.1590/s0036-46652008000100004.
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.
本次调查的目的是估计伊亚雷泰（位于上里奥内格罗河流域的一个多民族印第安社区）弓形虫感染的血清阳性率。我们开展了一项横断面调查（n = 260），以获取血清样本和人口统计学数据。样本通过家庭聚集分析随机选取。血清诊断采用酶联免疫吸附试验和间接免疫荧光法进行。反应性患病率为73.5%（191/260），在老年组中更高，50岁及以上组达到95.7%（44/46）。大多数血清阳性受试者的滴度等于或低于1:64。属于胡帕达族的印第安人的血清阳性率更高（p = 0.03）。根据本次调查，生活在伊亚雷泰的印第安人弓形虫抗体患病率很高。在卫生条件差和卫生习惯不良的背景下的人口聚集和城市化，以及饮用未过滤的水，可能与研究区域内观察到的弓形虫血清阳性率高有关。
