Schistosomiasis mansoni in an area of low transmission: I. impact of control measures

Author:

Marçal Júnior Oswaldo1,Patucci Rosa Maria de Jesus2,Dias Luiz Candido de Souza1,Hotta Luiz Koodi1,Etzel Arnaldo2

Affiliation:

1. Universidade Estadual de Campinas, Brazil

2. Superintendência de Controle de Endemias, Brazil

Abstract

This work was undertaken in the municipality of Pedro de Toledo (São Paulo State, Brazil) in 1987, to clarify aspects related to the transmission levels of Schistosoma mansoni in a human population where the snail host is Biomphalaria tenagophila. Since 1980 a control programme has been undertaken in this municipality. Urban and rural populations (4,719 subjects) were submitted to faecal examinations (Kato-Katz method). The overall prevalence rate was 4.8% being higher in males (6.2%) and also in the rural zone (5.8%). The geometric mean of S. mansoni eggs was 35.1 eggs per gramme of faeces (epg). Approximately 80.0% of the carriers presented less than 100 epg and only 20 individuals (9.0%) eliminated more than half of total eggs. The highest index of potencial contamination (IPC) was in the age group of 5 to 20 years (57.6%). Two thirds of the investigated patients (207) were autochthonous of Pedro de Toledo. The geographical distribution of the carriers showed a clear aggregation of the autochthonous cases and a close association between human contact sites and breeding places of B. tenagophila. This study shows that schistosomiasis subjects were not randomly aggregated, the youngsters should be the main target in the prophylaxis, and the efficacy of the control programme.

Publisher

FapUNIFESP (SciELO)

Subject

Infectious Diseases,General Medicine

Reference22 articles.

1. Cross-sectional studies on Schistosoma mansoni infection in northeast Brazil;BARBOSA F.S.;Ann. trop. Med. Parasit.,1975

2. Statistics in biology: statistical methods for research in the natural sciences;BLISS C. I.,1967

3. Estudos sobre a esquistossomose em Pernambuco.: Brasil;COUTINHO B.;Mem. Inst. Oswaldo Cruz,1940

4. The epidemiology and control of schistosomiasis mansoni where Biomphalaria tenagophila is the snail host;DIAS L.C.S.;Rev. Saúde públ.,1988

5. Schistosomiasis mansoni in the municipality of Pedro de Toledo (São Paulo, Brazil) where the Biomphalaria tenagophila is the snail host: I - Prevalence in human population;DIAS L.C.S.;Rev. Inst. Med. trop. S. Paulo,1989

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