controle da esquistossomose mansônica em área de baixa transmissao control of schistosomiasis mansoni in a low transmission area
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controle da esquistossomose mansônica em área de baixa transmissao control of schistosomiasis mansoni in a low transmission area

;Luiz Candido de Souza Dias;Oswaldo Marçal Júnior;Carmen Moreno Glasser;Hermínia Yoko Kanamura;Luiz Koodi Hotta
kurdistan journal of applied research 1992 Vol. 87 pp. 233-239
197
dias1992memriascontrole

Abstract

The schistosomiasis is transmitted by Biomphalaria tenagophila in our study area (Pedro de Toledo, Sao Paulo, Brazil). From 1980 to 1990 epidemiological surveys in a population of 4.000 inhabitants, has shown that: prevalence Kato-Katz (KKT), immunofluorescence (FT) and intradermal (IDT) techniques were 22.8%, 55.5% and 51.8% respectively; intensity of infection was low, 58.5 eggs per gram of faeces (epg); there were no symptomatic cases; prevalences were higher in mates, children and rural zone; index of potential contamination was 57.5% in the age group 5 to 20 years; 2/3 of patients were autochtonous; cases were no-randomly aggregated; transmission was focal and only 0.4% of snails were infected; water contacts through recreation showed the most important odds ratio; knowledge, attitudes and practices were satisfatory. From the epidemiological control findings a control programme was carried out; yearly faeces exams, chemotherapy, molluscocide, health education and sanitation. Thus, the prevalence decreased sharply to 3.3% and intensity of infection to 30.3 epg; the incidence rates ranged between 0.4% and 2.5% annualy; the sanitation became better and the youngsters were the main target in prophylaxis. To improve control, immunodiagnosis has to be conducted and the involvment of the population should be increase. However, we cannot forget that re-infection and the involvment of the population should be increase. However, we cannot forget that re-infection, therapeutic failure, etc, could play a major role in the maintnance this residual prevalence.

Keywords

schistosomiasis schistosoma mansoni tropical medicinemicrobiology

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DOI:
10.1590/S0074-02761992000800036
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