Trypanosoma cruzi strains from triatomine collected in Bahia and Rio Grande do Sul, Brazil

Revista de Saúde Pública

Aline Rimoldi Ribeiro¹  Vagner José Mendonça¹  Renata Tomé Alves¹  Isabel Martinez¹  Renato Freitas De Araújo¹  Fernanda Mello¹  João Aristeu Da Rosa¹ 

关键词: Chagas Disease;    transmission;    Triatominae;    Trypanosoma cruzi;    isolation;    Communicable Diseases;    epidemiology;    Doença de Chagas;    transmissão;    Triatominae;    Trypanosoma cruzi;    isolamento;    Doenças Transmissíveis;    epidemiologia;   

DOI  :  10.1590/S0034-8910.2014048004719

来源: SciELO

【 摘 要 】

OBJECTIVE Collection of triatomines in domestic, peridomestic and sylvatic environments in states of Bahia and Rio Grande do Sul, Northeastern and Southern Brazil respectively, and isolation of Trypanosoma cruzi strains. METHODS First, the captured triatomines were identified using insect identification keys, then their intestinal content was examined by abdominal compression, and the samples containing trypanosomatid forms were inoculated in LIT medium and Swiss mice. RESULTS Six triatomine species were collected in cities in Bahia, namely Panstrongylus geniculatus (01), Triatoma melanocephala (11), T. lenti (94), T. pseudomaculata (02), T. sherlocki (26) and T. sordida (460), and two in cities in Rio Grande do Sul, namely T. circummaculata (11) and T. rubrovaria (115). Out of the specimens examined, T. cruzi was isolated from 28 triatomine divided into four different species: T. melanocephala (one), T. lenti (one), T. rubrovaria (16) and T. sordida (10). Their index of natural infection by T. cruzi was 6.4%. CONCLUSIONS The isolation of T. cruzi strains from triatomines found in domestic and peridomestic areas shows the potential risk of transmission of Chagas disease in the studied cities. The maintenance of those T. cruzi strains in laboratory is intended to promote studies that facilitate the understanding of the parasite-vector-host relationship.

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