Is Rhodnius nasutus (Hemiptera; Reduviidae) changing its habitat as a consequence of human activity?
Rhodnius nasutus, a triatomine species autochthonous in the Brazilian Northeast, is primarily associated with the Copernicia prunifera palm tree (Carnauba). For the first time, the colonization of this triatomine in another tree species is reported. To investigate the existence of an infected triatomine focus located in a periurban area of the county of Jaguaruana, Ceará, situated in the Brazilian Northeast, where soil is greatly altered and natural vegetation scarce, an entomological survey was performed. During 2 consecutive days in August 2006 and 4 in December 2006, with the aid of live-bait traps, nine C. prunifera palms and seven Licania rigida trees (Oiticica), among other typical trees of the region, were sampled. In April 2007, 13 L. rigida trees and five C. prunifera palm trees were newly sampled. Considering the three investigation periods, a total of 20 R. nasutus specimens in C. prunifera and 52 in L. rigida were captured, in all developmental stages, 12.5 and 20.7%, respectively, harboring T. cruzi-like protozoa. The authors suggest that environmental damages are facilitating the ability of this species to colonize other trees besides palms.
KeywordsRice Paddy Bromeliad Spinosa Palm Tree Entomological Survey
Thanks go To Claudio Lazzari, François Noireau and Ana M. Jansen, for reviewing the manuscript, to Mitchell R. Lishon for English revision, and to Marcos Eduardo Melo for his invaluable assistance with the field work. This research received financial support from the Fundação de Apoio à Pesquisa do Estado do Rio de Janeiro (Faperj). We thank the Secretary of Health of the State of Ceará and the City Hall of Jaguaruana, Ceará, for the technical assistance, transportation, and physical facilities.
- Alencar JE (1987) História natural da doença de Chagas no Estado do Ceará. Imprensa Universidade da UFC, Ceará, Brasil, 341 ppGoogle Scholar
- Carbajal de la Fuente AL, Catalã S (2002) Relationship between antennal sensilla pattern and habitat in six species of Triatominae. Mem Inst Oswaldo Cruz 78:1121–1125Google Scholar
- Carcavallo RU, Rodriguez MEF, Salvatella R, Curto de Casas SI, Sherlock IS, Galvão C, Rocha DS, Girón IG, Arocha MAO, Martinez A, Rosa JAD, Canale DM, Farr TH, Barata JMS (1998) Habitats and related fauna. In: Carcavallo RU, Girón IG, Jurberg J, Lent H (eds) Atlas of Chagas disease in the Americas, vol II. Fiocruz, Rio de Janeiro, pp 561–600Google Scholar
- Dias JCP, Machado EMM, Fernandes AL, Vinhaes MC (2007) Esboço geral e perspectiva da doença de Chagas no Brasil. Cad Saúde Publica 16:13–34Google Scholar
- Dias FBS, Diotauiti L, Romanha AJ, Bezerra CM, Machado EMM (2007) First report on the occurrence of Trypanosoma rangeli Tejera, 1920 in the state of Ceará, Brazil, in natural infected triatomine Rhodnius nasutus Stal, 1859 (Hemiptera, Reduviidae, Triatominae). Mem Inst Oswaldo Cruz 102:643–645PubMedGoogle Scholar
- Diotaiuti L, Silveira AC, Elias M (1984) Encontro de Rhodnius prolixus Stal 1959 em macaubeiras. Ver Brás Malariol D Trop 36:11–14Google Scholar
- Kill LHP (2004) Caatinga: diversidade e preservação. Agroanalysis 24:18–19Google Scholar
- Molyneux D, Ostfeld R, Amerasinghe F, Bos R, Daszak P, Epstein P, Kristensen T, Morse S, Rubio Y (2003) Ecosystem disturbance, biodiversity, and human infectious diseases. In: Chivian E (ed) Biodiversity: its importance to human health (Interim Executive Summary). Harvard Medical School, Cambridge, MAGoogle Scholar
- Sarquis O, Sposina R, Oliveira TG, MacCord JR, Cabello PH, Pereira JB, Lima MM (2006) Aspects of peridomiciliary ecotopes in rural areas of Northeastern Brazil associated to triatomine (Hemiptera, Reduviidae) infestation, vectors of Chagas disease. Mem Inst Oswaldo Cruz 101:143–147PubMedCrossRefGoogle Scholar
- Silveira AC (2002) El control de la enfermedad de Chagas em los países del Cono Sur de América—Historia de una iniciativa internacional 1991/2001. OPAS, BrazilGoogle Scholar
- Teixeira ARL, Monteiro PS, Rebelo JM, Argañaraz ER, Vieira D, Lauria-Pires L, Nascimento R, Vexanat CA, Silva AR, Ault SK, Costa JM (2001) Emerging Chagas disease: trophic network and cycle of transmission of Trypanosoma cruzi from palm trees in the Amazon. Emerg Infect Dis 7:100–112PubMedCrossRefGoogle Scholar