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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 101, No. 2, 2006, pp. 143-147
Bioline Code: oc06028
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 101, No. 2, 2006, pp. 143-147

 en Aspects of peridomiciliary ecotopes in rural areas of Northeastern Brazil associated to triatomine (Hemiptera, Reduviidae) infestation, vectors of Chagas disease
Otília Sarquis; Ricardo Sposina; Tiago Guedes de Oliveira; José Roberto Mac Cord; Pedro Hernan Cabello; José Borges-Pereira & Marli Maria Lima


Artificial ecotopes of 121 peridomiciliary environments in four rural localities in the state of Ceará, Brazil, were studied and the type of material of the ecotopes was identified as triatomine infestation. Two thousand two hundred and four Triatoma brasiliensis check for this species in other resources Neiva, 340 Triatoma pseudomaculata check for this species in other resources Corrêa and Espínola, 121 Rhodnius nasutus check for this species in other resources Stall, and 5 Panstrongylus lutzi check for this species in other resources (Neiva and Pinto) were captured. Out of the 323 ecotopes found (x=2.0 ± 1.8 per dwelling) such as pigpens, henhouses, corrals, perches, dovecotes, piles of roofing tiles, bricks, wood, and straw 30.3% were infested by triatomines in all different developmental stages, including eggs. A substantial number of triatomines were found in perches, however the largest infestation took place in roofing materials used in the construction of goat/sheep corrals, henhouses, and pigpens, where 98% of them were captured: 1372 triatomines were located in the roofing tile covers, 285 in the straw, 187 in the perches, 77 in the coverings of roofing tiles and straw, and 13 in the straw and wood. Among all the different pile of materials, roofing tiles were the most infested (50%) followed by bricks (38.9%) and woods (36.1%). T. brasiliensis colonized mainly brick piles (χ2=16.539; p < 0.05) and roofing tiles (χ2=5,090.58; p < 0.05); T. pseudomaculata preferred wood perches (χ2= 472.39; p < 0.05) and woodpiles (χ2 =126.0 p < 0.05), and R. nasutus was principally found in roofing straw (χ2=384.43; p < 0.05). These findings suggest that triatomines tend to colonize peridomiciliary ecotopes similar to their original habitats.

triatomines - ecotopes - peridomicile - Chagas disease - Northeastern Brazil

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