Current spread of Triatoma infestans at the expense of Triatoma sordida in Bolivia

Considerations on the epidemiology and transmission of Chagas disease in the Brazilian amazon

“…This species that was introduced into Brazil at the beginning of this century needs to be well policed at the borders of the Amazon region, especially because it has already been reported for the state of Maranhão as well as the northern part of the state of Tocantins (Filho & Silveira 1979). Noireau et al (1996) has referred to the geographical expansion of sylvatic foci of this species into areas of hot and humid climates such as those of the Amazon where it has yet to penetrate. This makes imperative a permanent entomological vigilance for this species, along the Trans-Amazon Highway, for example, where colonists live in precarious houses that could easily be colonized by this triatomine.…”

Genetic Structure of Triatoma sordida (Hemiptera: Reduviidae) Domestic Populations from Bolivia: Application on Control Interventions

“…It is widely distributed throughout central Brazil, eastern and central Bolivia, the Chaco region of Paraguay, and northwestern Argentina where it occurs primarily in a silvatic environment (Lent & Wygodzinsky 1979, Diotaiuti et al 1995. In wide areas of the Southern Cone, T. sordida is more often found in peridomestic habitat and can also form domestic colonies (Forattini 1980, Dias 1988, Noireau et al 1996.…”

“…sordida is currently considered as a possible substitute to the present domestic vector T. infestans in the transmission of T. cruzi. The process of domiciliation may also be primary without any relation to a previous eradication of the main vector (Dias 1988, Noireau et al 1996. Owing to its in- ability to form large colonies, T. sordida holds a poor vectorial significance in domiciliary condition (Noireau et al 1997).…”

New chromosomal evidence for the origin of Triatoma infestans populations from Brazil

“…Triatoma infestans is a synanthropic species broadly distributed among triatomine in the Americas, and for a long time, considered to be the main vector species of Chagas disease in South America (Noireau et al, 1996). According to Galvão et al (2003), this species can be found in Argentina, Bolivia, Brazil, Chile, Ecuador, Mexico, Paraguay, Peru, and Uruguay.…”