García-Jordán Noris, Berrizbeitia Mariolga, Concepción Juan Luis, Aldana Elis, Cáceres Ana, Quiñones Wilfredo
Departamento de Biología, Núcleo de Sucre, Universidad de Oriente, Cumaná, Venezuela.
Posgrado en Biología Aplicada, Núcleo de Sucre, Universidad de Oriente, Cumaná, Venezuela.
Biomedica. 2015 Apr-Jun;35(2):247-57. doi: 10.1590/S0120-41572015000200013.
The ecological niche of Reduvidae vectors has been modified due to environmental changes and human encroachment into the rural areas.
This study evaluates the current entomological indices of triatomines responsible for Trypanosoma cruzi infection in Sucre State, Venezuela.
A cross-sectional and prospective study was conducted in 95 towns and 577 dwellings in the 15 municipalities of the state of Sucre, Venezuela, from August to November, 2008. Triatomine bugs were identified on the basis of morphological characteristics, and their feces examined for T. cruzi infection through direct microscopy. Positive slides were stained with Giemsa and parasites were identified by morphologic characterization.
The entomological indices expressing the highest values were dispersion (16.67%) and household colonization (33.33%). The triatomine species captured were: Rhodnius prolixus , Rhodnius main intradomiciliary vector.
Despite the low index of vector infection (1.72%), the existence of species with domiciliary and peridomiciliary reproductive success ensures the persistence of the epidemiological chain both for the disease and the parasite.
由于环境变化和人类向农村地区的扩张，锥蝽传播媒介的生态位已发生改变。
本研究评估了委内瑞拉苏克雷州负责传播克氏锥虫感染的锥蝽当前的昆虫学指标。
2008年8月至11月，在委内瑞拉苏克雷州15个市的95个城镇和577处住所开展了一项横断面前瞻性研究。根据形态特征鉴定锥蝽，通过直接显微镜检查其粪便以检测克氏锥虫感染情况。阳性玻片用吉姆萨染色，通过形态学特征鉴定寄生虫。
表现出最高值的昆虫学指标是扩散率（16.67%）和家庭定殖率（33.33%）。捕获的锥蝽种类有：致倦库蚊，主要的家栖传播媒介。
尽管媒介感染率较低（1.72%），但存在在家居环境和周边环境有繁殖成功的物种，这确保了疾病和寄生虫的流行病学链条持续存在。
