Sources of Blood for Triatoma dimidiata (Hemiptera: Reduviidae) in an Endemic Area of Chagas' Disease in Costa Rica

Ze­l­e­dón­, Rodri­go; Solano, Georgina; Swartzwelder, J. C.

doi:10.2307/3277461

Cited by 4 publications

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“…Dogs, cats and rodents are synanthropic reservoirs of T. cruzi and common blood meal sources [14]–[16]. Chickens are a blood source for various triatomines and are thought to play a role in house colonization, even though they are refractory to T. cruzi [17], [18].…”

Section: Introductionmentioning

confidence: 99%

Ecological, Social and Biological Risk Factors for Continued Trypanosoma cruzi Transmission by Triatoma dimidiata in Guatemala

et al. 2014

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BackgroundChagas disease transmission by Triatoma dimidiata persists in Guatemala and elsewhere in Central America under undefined ecological, biological and social (eco-bio-social) conditions.MethodologyEco-bio-social risk factors associated with persistent domiciliary infestation were identified by a cross-sectional survey and qualitative participatory methods. Quantitative and qualitative data were generated regarding Trypanosoma cruzi reservoirs and triatomine hosts. Blood meal analysis and infection of insects, dogs and rodents were determined. Based on these data, multimodel inference was used to identify risk factors for domestic infestation with the greatest relative importance (>0.75).Principal FindingsBlood meal analysis showed that 64% of 36 bugs fed on chickens, 50% on humans, 17% on dogs; 24% of 34 bugs fed on Rattus rattus and 21% on Mus musculus. Seroprevalence among 80 dogs was 37%. Eight (17%) of 46 M. musculus and three (43%) of seven R. rattus from households with infected triatomines were infected with T. cruzi Distinct Typing Unit I. Results from interviews and participatory meetings indicated that vector control personnel and some householders perceived chickens roosting and laying eggs in the house as bug infestation risk factors. House construction practices were seen as a risk factor for bug and rodent infestation, with rodents being perceived as a pest by study participants. Multimodel inference showed that house infestation risk factors of high relative importance are dog density, mouse presence, interior wall plaster condition, dirt floor, tile roofing and coffee tree presence.Conclusions/SignificancePersistent house infestation is closely related to eco-bio-social factors that maintain productive T. dimidiata habitats associated with dogs, chickens and rodents. Triatomine, dog and rodent infections indicate active T. cruzi transmission. Integrated vector control methods should include actions that consider the role of peridomestic animals in transmission and community memberś level of knowledge, attitudes and practices associated with the disease and transmission process.

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Section: Introductionmentioning

confidence: 99%

Ecological, Social and Biological Risk Factors for Continued Trypanosoma cruzi Transmission by Triatoma dimidiata in Guatemala

et al. 2014

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“…Triatoma dimidiata, the main vector of Chagas disease in Costa Rica, can be found in human dwellings and in wild habitats (Zeledón et al 1970b). The insect is distributed from the middle of Mexico to northern Peru with its most eastern location in northwestern Venezuela (Carcavallo et al 1999).…”

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confidence: 99%

Evidence of colonization of man-made ecotopes by Triatoma dimidiata (Latreille, 1811) in Costa Rica

Zeledón

Montenegro

Zeledón

2001

Mem. Inst. Oswaldo Cruz

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Disease and development in the tropics: A review of Chagas' disease

Haddock

1979

Social Science & Medicine. Part D: Medical Geography

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Sources of Blood for Triatoma dimidiata (Hemiptera: Reduviidae) in an Endemic Area of Chagas' Disease in Costa Rica

Cited by 4 publications

References 0 publications

Ecological, Social and Biological Risk Factors for Continued Trypanosoma cruzi Transmission by Triatoma dimidiata in Guatemala

Ecological, Social and Biological Risk Factors for Continued Trypanosoma cruzi Transmission by Triatoma dimidiata in Guatemala

Evidence of colonization of man-made ecotopes by Triatoma dimidiata (Latreille, 1811) in Costa Rica

Disease and development in the tropics: A review of Chagas' disease

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