Resumo O objetivo desse trabalho foi determinar a prevalencia das parasitoses em escolaresde Bambui, atraves de exames coprologicos (direto e Kato-Katz) e reavaliar os criadouros demoluscos descritos no municipio. Dos 2.901 escolares examinados, 20,1% estavam parasitados,sendo que Giardia lamblia, Entamoeba coli, Ascaris lumbricoides e ancilostomideos foram osparasitas mais frequentes, com prevalencias de 6,2%, 6,2%, 4,8% e 1,4%, respectivamente. Osancilostomideos foram significativamente mais frequentes na zona rural e nos alunos com maisde 14 anos, enquanto a prevalencia da E. coli foi maior na zona urbana e a G. lamblia maisfrequente na faixa etaria de 0-6 anos. Somente tres criancas eliminavam ovos de Schistosomamansoni. O unico hospedeiro intermediario encontrado foi a Biomphalaria glabrata e nenhumadelas estava eliminando cercarias de S. mansoni . Comparando-se estes dados a de levantamentosrealizados anteriormente no municipio, observou-se uma queda na prevalencia de todos osparasitas. Algumas hipoteses para tentar explicar esta queda sao discutidas tais como: processointenso de urbanizacao e a melhoria das condicoes socio-sanitarias do municipio.Palavras-chaves: Parasitoses intestinais. Inquerito parasitologico. Escolares. Biomphalaria.Schistosoma mansoni.Abstract This work was carried out with the purpose of determining the prevalence of intestinalparasitoses in the school children of Bambui, through parasitological examinations (direct andKato-Katz methods) and reevaluating the snails’ breeding places described in the county. Of the2,091 school children examined, 20.1% had at least one parasitic infection. Giardia lamblia,Entamoeba coli, Ascaris lumbricoides and hookworm are the most frequent parasites, with aprevalence of 6.2%, 6.2%, 4.8% and 1.4%, respectively. The hookworms were significantly morefrequent among students from the rural area and in those aged over 14 years, while the prevalenceof E. coli was greater in the urban area and the G. lamblia was more frequent in children under 6years old. Only three children shed eggs of Schistosoma mansoni. The only intermediate hostfound was Biomphalaria glabrata and none of them was shedding cercariae of S. mansoni. Whenthese data were compared with data from other surveys previously effected in the county, adecline was observed in the prevalence of all parasites. Some hypotheses which may explainthis decline are discussed, such as: intense urbanization process and improvement of social-sanitary conditions of the county.Key-words: Intestinal parasites. Parasitological survey. School children. Biomphalaria.Schistosoma mansoni.
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