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The entomological features of Chagas disease in two western Mexican villages were analyzed through triatomines collection by the inhabitants and active research in the peridomicile. The inhabitant collections have the following comparable characteristics: 1) Meccus longipennis was the dominant species (> 91%), 2) around 43% of the insects were collected indoors, 3) about 70% of triatomines were adults, 4) cumulated rates of infestation of the dwellings reached 40–50%, 5) the triatomine infection rate by Trypanosoma cruzi was > 50%, and 6) the indoor triatomines frequently feed on humans (range 38.5–56.2%). However, the collection was twice as abundant in the first village and the peridomicile infestation, evaluated by the active collection, reached up to 60% and only 4.9% in the other village. Furthermore, females predominated in the first village, whereas males in the other. The current results allow discussing the course of action to prevent Chagas disease in this region.
Financial support: This work received financial support from the UNDP/WorldBank/WHO Special program for Research and Training in Tropical Diseases (TDR) on Operational Research on Chagas disease, ID A30442 and from the “Institut de Recherche pour le Développement” (IRD) France.
Authors' addresses: Simone Frédérique Brenière and Marie-France Bosseno, Institut de Recherche pour le Développement (IRD), Representación en Bolivia, UR 016 Caractérisation et Contrôle des Populations de Vecteurs, Avenida Hernando Siles N° 5290, Esq. Calle 7, Obrajes, C.P. 9214, La Paz, Bolivia, E-mails: Frederique.Breniere@ird.fr and Marie-France.Bosseno@ird.fr. Ezequiel Magallón Gastélum, María Margarita Soto Gutiérrez, Marina de Jesús Kasten Monges, and Felipe de Jesús Lozano Kasten, Departamento de Salud Pública, Centro Universitario de Ciencias de la Salud, AP 2-136, Universidad de Guadalajara, Guadalajara, Jalisco, México, E-mails: mge28525@cucs.udg.mx, msg0059_2001@hotmail.com, m_kasten_m@yahoo.com.mx, and f_lozano_k@hotmail.com. José Horacio Barraza Salas and José Justo Romero Paredes, Universidad Autónoma de Nayarit, Unidad Académica de Medicina, Ciudad de la Cultura Amado Nervo, Nayarit, México, E-mails: barraza28@hotmail.com and jose1_justo@hotmail.com.