Aspectos operacionais do controle do Triatoma brasiliensis

Cadernos de Saúde Pública

Liléia Diotaiuti²  Osvaldo F. Faria Filho¹  Francisco C. F. Carneiro¹  João Carlos Pinto Dias²  Herton Helder R. Pires²  Christopher J. Schofield¹ 

[1] ,Fundação Oswaldo Cruz Centro de Pesquisas René Rachou Belo Horizonte MG ,Brasil

关键词: Chagas Disease;    Triatominae;    Vector Control;    Insect Vectors;    Prevention and Control;    Doença de Chagas;    Triatominae;    Controle de Vetores;    Insetos Vetores;    Prevenção e Controle;   

DOI  :  10.1590/S0102-311X2000000800006

来源: SciELO

【 摘 要 】

Vector control strategies against indigenous species is not easy, due to their capacity to reinvade treated premises from sylvatic ecotopes. Between August 1996 and December 1997 we conducted a study on reinfestation of houses after spraying in a county in the State of Ceará. Of 277 houses examined, 113 (40.8%) were infested (21.7% intradomiciliary and 35.4% peridomiciliary). Of the 433 Triatominae collected, 207 were Triatoma brasiliensis (49% of which intradomiciliary, with a mean of 1.8 insects/house) and 226 were Triatoma pseudomaculata (97% peridomiciliary). The age structure of the two indicated a univoltine development cycle for T. brasiliensis and two cycles per year for T. pseudomaculata. Four months after spraying with deltamethrin SC 25mg ia/m², 9.7% of the houses were still positive, mainly with peridomestic infestations. Intradomiciliary wall bioassays showed persistence of the insecticide up to 9 months after spraying. Considering the high potential for recolonization of treated premises from sylvatic foci, we propose an operational strategy combining traditional evaluations and community-based surveillance with increased selective interventions and community education.

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