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Revista do Instituto de Medicina Tropical de São Paulo

On-line version ISSN 1678-9946

Rev. Inst. Med. trop. S. Paulo vol.35 no.4 São Paulo July/Aug. 1993

http://dx.doi.org/10.1590/S0036-46651993000400005 

ORIGINAL ARTICLES

 

Schistosomiasis mansoni in an area of low transmission. II. Risk factors for infection

 

Esquistossomose mansônica em área de baixa transmissão. II. Fatores de risco para infecção

 

 

Oswaldo Marçal JúniorI; Luiz Koodi HottaI; Rosa Maria de Jesus PatucciII; Carmen Moreno GlasserII; Luiz Candido de Souza DiasI

IUniversidade Estadual de Campinas (UNICAMP). Campinas, S. Paulo, Brasil
IISuperintendência de Controle de Endemias de S. Paulo (SUCEN)

Address for correspondence

 

 


SUMMARY

Risk factors for Schistosoma mansoni infection were identified using a 1:1 matched case-control design. The work was conducted in the municipality of Pedro de Toledo, São Paulo State, Brazil, an area where the snail host is Biomphalaria tenagophila. Information on water contact patterns, knowledge, attitudes and pratices (kap), socioeconomic and sanitary conditions were obtained by mean of questionnaires. The crude odds ratio estimates and the adjusted odds ratio estimates using the logistic regression model are presented. Most of the examined individuals admitted recent water contacts (90.6% of the cases). The most frequent reason for contact was swimming, playing and fishing and the preferential site of contact was the river. According to the logistic regression technique, the main risk factors for infection were: a) water contact through swimming, playing and fishing; b) fording; c) bad hygiene. We concluded that recreational activities are the main reasons for schistosomiasis transmission in Pedro de Toledo and leisure alternatives should be offered to the local population.

Key words: Schistosomiasis transmission; Schistosoma mansoni; Risk factors; Water contact pattern.


RESUMO

A partir de um estudo de caso-controle por pareamento (1:1) foram determinados os fatores de risco para infecção por Schistosoma mansoni. O trabalho foi desenvolvido no município de Pedro de Toledo, São Paulo, Brasil, área onde Biomphalaria tenagophila é o hospedeiro intermediário. Por meio de questionários foram obtidas informações sobre o padrão de contato com águas naturais; percepção da doença e condições sanitárias e socio-econômicas. Os fatores de risco foram estimados individualmente e através de modelo logístico. A maioria dos pesquisados admitiu contatos recentes com águas naturais (90,6% dos casos). O motivo mais freqüente para estes contatos foi nadar, brincar e pescar. O rio representou o principal local de contato com águas naturais. De acordo com a técnica de regressão logística, os principais fatores de risco foram: a) contato com água para nadar, brincar, pescar; b) vadear; c) más condições de higiene. Concluímos que as atividades recreativas são as principais responsáveis pela transmissão da esquistossomose em Pedro de Toledo e alternativas de lazer devem ser oferecidas a esta população.


 

Full text available only in PDF format.

Texto completo disponível apenas em PDF.

 

 

ACKNOWLEDGMENT

We are thankful to Dr. Antonio Guilherme de Souza for support given to the study, to SUCEN field staff for its invaluable participation, to Prof. Dr. José F. de Carvalho for this important contributions to the project, to Prof. Dr. Aricio Xavier Linhares for reviewing the manuscripts and to the people of Pedro de Toledo.

 

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Address for correspondence:
Dr. Oswaldo Marçal Júnior
Universidade Federal de Uberlandia, Centro de Ciências Biomédicas, Departamento de Biociências. Campus Umuarama
Caixa Postal 593
CEP 38.400, Uberlândia, MG, Brasil

Recebido para publicação em 13/3/1992
Aprovado para publicação em 3/5/1993
This project was supported by SUCEN, FAPESP and CNPq.

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