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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 110, No. 2, 2015, pp. 192-200
Bioline Code: oc15023
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 110, No. 2, 2015, pp. 192-200

 en Factors associated with the occurrence of Triatoma sordida check for this species in other resources (Hemiptera: Reduviidae) in rural localities of Central-West Brazil
Rossi, Juliana Chedid Nogared; Duarte, Elisabeth C. & Gurgel-Gonçalves, Rodrigo

Abstract

This study estimates the factors of artificial environments (houses and peridomestic areas) associated with Triatoma sordida check for this species in other resources occurrence. Manual searches for triatomines were performed in 136 domiciliary units (DUs) in two rural localities of Central-West Brazil. For each DU, 32 structural, 23 biotic and 28 management variables were obtained. Multiple logistic regression analysis was performed in order to identify statistically significant variables associated with occurrence of T. sordida in the study areas. A total of 1,057 specimens (99% in peridomiciles, mainly chicken coops) of T. sordida were collected from 63 DUs (infestation: 47%; density: ~8 specimens/DU; crowding: ~17 specimens/infested DU; colonisation: 81%). Only six (0.6%) out of 945 specimens examined were infected with Trypanosoma cruzi check for this species in other resources . The final adjusted logistic regression model indicated that the probability of T. sordida occurrence was higher in DU with wooden chicken coops, presence of > 30 animals in wooden corrals, presence of wood piles and presence of food storeroom. The results show the persistence of T. sordida in peridomestic habitats in rural localities of Central-West Brazil. However, the observed low intradomestic colonisation and minimal triatomine infection rates indicate that T. sordida has low potential to sustain high rates of T. cruzi transmission to residents of these localities.

Keywords
Triatominae; Triatoma sordida; peridomicile; logistic regression; Chagas disease

 
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