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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 109, No. 7, 2014, pp. 887-898
Bioline Code: oc14131
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 109, No. 7, 2014, pp. 887-898

 en Domestic, peridomestic and wild hosts in the transmission of Trypanosoma cruzi in the Caatinga area colonised by Triatoma brasiliensis
Bezerra, Claudia Mendonça; de Góes Cavalcanti, Luciano Pamplona; de Souza, Rita de Cássia Moreira; Barbosa, Silvia Ermelinda; das Chagas Xavier, Samanta Cristina; Jansen, Ana Maria; Ramalho, Relrison Dias & Diotaiuti, Liléia

Abstract

The role played by different mammal species in the maintenance of Trypanosoma cruzi is not constant and varies in time and place. This study aimed to characterise the importance of domestic, wild and peridomestic hosts in the transmission of T. cruzi in Tauá, state of Ceará, Caatinga area, Brazil, with an emphasis on those environments colonised by Triatoma brasiliensis. Direct parasitological examinations were performed on insects and mammals, serologic tests were performed on household and outdoor mammals and multiplex polymerase chain reaction was used on wild mammals. Cytochrome b was used as a food source for wild insects. The serum prevalence in dogs was 38% (20/53), while in pigs it was 6% (2/34). The percentages of the most abundantly infected wild animals were as follows: Thrichomys laurentius 74% (83/112) and Kerodon rupestris check for this species in other resources 10% (11/112). Of the 749 triatomines collected in the household research, 49.3% (369/749) were positive for T. brasiliensis, while 6.8% were infected with T. cruzi (25/369). In captured animals, T. brasiliensis shares a natural environment with T. laurentius, K. rupestris, Didelphis albiventris check for this species in other resources , Monodelphis domestica check for this species in other resources , Galea spixii check for this species in other resources , Wiedomys pyrrhorhinos check for this species in other resources , Conepatus semistriatus check for this species in other resources and Mus musculus check for this species in other resources . In animals identified via their food source, T. brasiliensis shares a natural environment with G. spixii, K. rupestris, Capra hircus check for this species in other resources , Gallus gallus check for this species in other resources , Tropidurus oreadicus check for this species in other resources and Tupinambis merianae check for this species in other resources . The high prevalence of T. cruzi in household and peridomiciliar animals reinforces the narrow relationship between the enzootic cycle and humans in environments with T. brasiliensis and characterises it as ubiquitous.

Keywords
Triatominae; Triatoma brasiliensis; Trypanosoma cruzi; hosts; semiarid

 
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