A revision of thirteen species of Triatominae (Hemiptera: Reduviidae) vectors of Chagas disease in Mexico

Abstract

Vectors of Trypanosoma cruzi, parasite responsible for Chagas disease, are divided in intradomestic, peridomestic and sylvatic. The intradomestic are Triatoma barberi and Triatoma dimidiata, two species that represent the highest health risk among the Mexican population. Triatoma dimidiata is a species found mainly inside human habitats, but in Yucatan, it corresponds to the peridomicile vectors. Also in the peridomicile most of Chagas disease vectors are found: Meccus bassolsae, M. longipennis, M. mazzottii, M pallidipennis, M. phyllosomus, M picturata, Triatoma gerstaeckeri, T mexicana, T rubida, Dipetalogaster máxima (the last two are in the process of becoming adapted to the domicile), Panstrongylus rufotuberculatus which occasionally enters the domicile in its adult stage, and Rhodnius prolixus, which is practically controlled in the country. Peridomestic vectors are of lower risk in the transmission dynamics, as compared to the intradomestic ones. For the control of the intradomestic vectors, health education programs, improvements of housing, and the use of pesticides are essential To control the peridomestic vectors, health education programs are required, as well as the use of mosquito nets on doors and windows and around beds, aside from cementing the stone wall fences.

The Role of DmCatD, a Cathepsin D-Like Peptidase, and Acid Phosphatase in the Process of Follicular Atresia in Dipetalogaster maxima (Hemiptera: Reduviidae), a Vector of Chagas' Disease

“…This is an aggressive species that usually takes its blood meal from lizards. However, it has been reported its adaptation to suburban areas, feeding on human or domestic animals [ 26 ]. Despite their relatively lower epidemiologic relavence compared to other triatomine vectors, the females of D .…”

Geographic variation on biological parameters ofMeccus picturatus(Usinger), 1939 (Hemiptera: Reduviidae)

“…In México, M. picturatus (Usinger), together with the other five species of the genus Meccus, are distributed in more than 50% of the Mexican territory and are also responsible for 74% of vectorial transmissions of T. cruzi to humans (Ibarra-Cerdeña et al 2009, Salazar-Schettino et al 2010.…”

Seropositivity for Trypanosoma cruzi in domestic dogs from Sonora, Mexico

“…Triatoma recurva has been reported in the Mexican states of Chihuahua, Sonora, and Sinaloa, and has been found in dwellings of inhabitants of the region and in their peridomiciliary environments. The presence of Triatoma rubida and Triatoma longipennis as insects in the process of adaptation to colonize human dwellings and as important transmitter vectors of CD has been documented in the states of Jalisco, Nayarit, Colima, and Sonora [ 37 , 38 ]. For these reasons, we can infer that the presence of antibodies (IgG and 1/180 IgM) against T. cruzi found in domestic dogs in the study area is due to an active transmission of T. cruzi by the vector route.…”