An investigation on the ecology of Triatoma vitticeps (Stal, 1859) and its possible role in the transmission of Trypanosoma cruzi, in the locality of Triunfo, Santa Maria Madalena municipal district, state of Rio de Janeiro, Brazil

被引:28
作者
Goncalves, TCM
de Oliveira, E
Dias, LS
Almeida, MD
Nogueira, WO
Pires, FDD
机构
[1] Inst Oswaldo Cruz, Lab Transmissores Leishmaniose & Oncocercose, Nucleo Morfol Anat Interna & Ultraestrutura Artro, BR-21405900 Rio De Janeiro, Brazil
[2] Inst Oswaldo Cruz, Lab Nacl & Int Referencia Taxon Triatomineos, BR-21405900 Rio De Janeiro, Brazil
[3] Inst Oswaldo Cruz, Dept Entomol, Colecao Entomol, BR-21405900 Rio De Janeiro, Brazil
[4] Inst Oswaldo Cruz, Dept Trop Med, BR-21405900 Rio De Janeiro, Brazil
[5] COORRJ, Fdn Nacl Saude, BR-20081060 Rio De Janeiro, Brazil
来源
MEMORIAS DO INSTITUTO OSWALDO CRUZ | 1998年 / 93卷 / 06期
关键词
Triatoma vitticeps; ecology; Trypanosoma cruzi; State of Rio de Janeiro; Brazil;
D O I
10.1590/S0074-02761998000600002
中图分类号
R38 [医学寄生虫学]; Q [生物科学];
学科分类号
07 ; 0710 ; 09 ; 100103 ;
摘要
From January 1989 to April 1995, 465 specimens of Triatoma vitticeps were collected in the locality of Triunfo, 2nd District of Santa Maria Madalena municipal district, State of Rio de Janeiro. The bugs were found indoors by local residents with predominance of adults. The flight activity was high in hot months when the incidence in the domicile also increased. Two hundred and two bugs (111 alive and 91 dead) were examined for Trypanosoma cruzi infection. This was detected in 31 of the dead bugs (34%) and 88 (79%) of the live bugs examined. With a view to investigate the possible vertebrate hosts of the T. cruzi isolates, the blood of 122 mammals was examined through Giemsa-stained smears, hemocultures and xenodiagnosis. T. cruzi was detected in three specimens of Didelphis marsupialis and T (M.) theileri was detected in one specimen of Bos taurus. The parasites were isolated from triatomine feces, xenoculture and hemoculture. No evidence of human infection was detected in 58 inhabitants examined, as evaluated by indirect imunofluorescence technique using T. cruzi epimastigotes as antigens. These results show that T. vitticeps is still a sylvatic species although nymphs have been found inside the domicile. Thus, an epidemiological vigilance is necessary, to know the behaviour of this species following the continuous modifications promoted by the presence of man.
引用
收藏
页码:711 / 717
页数:7
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