Dispersion and colonization of Triatoma ryckmani (Hemiptera: Reduviidae) in artificial environments in a semiarid region of a Chagas disease endemic area in Guatemala

Parâmetros populacionais para Triatoma sordida Stal, 1859, o vetor mais freqüente da doença de Chagas no Triângulo Mineiro (Heteroptera, Triatominae)

“…Questões como atividade sazonal, razão sexual, mobilidade 13 , resposta comportamental a inseticidas 1 2 , tempo de defecação após repasto, em função da fonte alimentar 6 10 11 12 13 devem ser esclarecidas, visando assim criar condições favoráveis a erradicação dos vetores de uma das moléstias que produz o maior ônus de enfermidade entre as denominadas doenças tropicais.…”

Life cycle of Triatoma ryckmani (Hemiptera: Reduviidae) in the laboratory, feeding patterns in nature and experimental infection with Trypanosoma cruzi

“…In spite of the fact that T. ryckmani has not been found infected with T. cruzi under natural conditions (Marroquín et al 2004a, Monroy et al 2004, Marín et al 2006, the species is able to colonize chicken coops, sometimes in elevated numbers, up to 369 in a single coop (Nakagawa et al 2005). It also has been found colonizing houses, in smaller quantities, and adults are also found visiting houses in domestic and peridomestic environments, both in Nicaragua and Guatemala (Monroy et al 2004, Nakagawa et al 2005, Marín et al 2006.…”

“…It also has been found colonizing houses, in smaller quantities, and adults are also found visiting houses in domestic and peridomestic environments, both in Nicaragua and Guatemala (Monroy et al 2004, Nakagawa et al 2005, Marín et al 2006. Now that we know that this species becomes easily infected with T. cruzi in the laboratory, its natural infection could be predicted and its epidemiological role in the transmission of Chagas disease in Central American countries needs to be assessed.…”

“…More recently, the natural habitats of T. ryckmani were discovered in a semiarid region of El Progreso Department, Guatemala, in cacti (Stenocercus eichlamii) and epiphytic bromeliads (Tillandsia xerographica). In the first instance, all instars of the bug were found in the dry portions of the cactus (Marroquín et al 2004a, Monroy et al 2004; in the second situation, colonies of the bugs were also found within the leaves of the bromeliads growing on trees, including the cacti (Marroquín et al 2004b). The species has also been found in at least four Departments of Nicaragua in small numbers in houses, under intra and peridomiciliary conditions (Marín et al 2006 Here we describe, for the first time, the entire life cycle of T. ryckmani under laboratory conditions and the blood patterns of the different instars from specimens collected under natural conditions in Guatemala.…”

Notes onRhodnius pallescens,Triatoma ryckmaniand four other species of triatomines from Nicaragua

“…In Guatemala over the last few years, however, large numbers of Tri. ryckmani have been caught not only in bromeliads and cacti in semi-arid regions but also colonizing human dwellings and chicken coops Monroy et al, 2004). As this species can be infected with Try.…”