ABSTRACT
Objetivo: Esta pesquisa avaliou a ocorrência de parasitos intestinais em estudantes do munícipio de São João da Boa Vista, SP. Métodos: Foram examinadas 67 amostras de fezes no período de março a agosto de 2013, segundo os métodos de Hoffman, Pons & Janer, Wilis e Rugai, Mattos & Brisola. Resultados: A prevalência geral de infecção foi de 19,4%. Helmintoses não foram observadas e Giardia duodenalis foi o único protozoário parasito verificado. Conclusão: Conclui-se que a prevalência de enteroparasitoses no grupo estudado é menor que o esperado, o que provavelmente deva ser consequência das boas condições socioeconômicas e sanitárias presentes no ambiente escolar e na comunidade em que as crianças estão inseridas.
Subject(s)
Humans , Male , Female , Infant , Child, Preschool , Child , Child Day Care Centers , Parasitic Diseases , Public Health , Communicable Disease ControlABSTRACT
Introduction Human migration and the presence of natural vectors (mollusks) of Schistosoma mansoni are the primary causes of the expansion of mansoni schistosomiasis into southern areas of South America. Water conditions are favorable for the expansion of this disease because of the extensive hydrographic network, which includes the basins of the Paraná and Uruguay rivers and favors mollusk reproduction. These rivers also aid agriculture and tourism in the area. Despite these favorable conditions, natural infection by S. mansoni has not yet been reported in Argentina, Uruguay, or Paraguay. Methods Two species of planorbid from Argentina, Biomphalaria straminea and B. tenagophila, were exposed to the miracidia of five Brazilian strains of S. mansoni. Results Biomphalaria tenagophila (Atalaya, Buenos Aires province) was infected with the SJS strain (infection rate 3.3%), confirming the experimental susceptibility of this Argentinian species. Biomphalaria straminea (Rio Santa Lucía, Corrientes province) was susceptible to two Brazilian strains: SJS (infection rate 6.7%) and Sergipe (infection rate 6.7%). Conclusions These results demonstrate that species from Argentina have the potential to be natural hosts of S. mansoni and that the appearance of foci of mansoni schistosomiasis in Argentina is possible. .