Bar María Esther, Pieri Damborsky Miryam, Oscherov Elena Beatriz, Milano Alicia, Francisco Maria, Avalos Gilberto, Wisnivesky-Colli Cristina
Cátedra de Artrópodos, Facultad de Ciencias Exactas y Naturales y Agrimensura, Universidad Nacional del Nordeste, Av. Libertad 5470 (3400) Corrientes, Argentina.
Mem Inst Oswaldo Cruz. 2002 Jan;97(1):43-6. doi: 10.1590/s0074-02762002000100005.
An entomological and serological survey was performed in three localities of the Department of Concepción, Province of Corrientes, Argentina in 1998 and 1999, to identify triatomines species involved in domestic and wild transmission of Chagas disease. Triatomines were collected by man/hour capture in 32 houses randomly selected and 44 nearby outdoor ecotopes. Trypanosoma cruzi infection in triatomines was assessed by direct microscopic observation (400x) of feces and polymerase chain reaction. Serological techniques used for people were Indirect Hemagglutination Test and Indirect Fluorescent Test. Triatomines were collected in 28.1% of the houses and 31.8% of the wild biotopes. Triatoma infestans (Klug 1834) was exclusively found indoors and T. cruzi infected 60% of them. Triatoma sordida (Stål 1859) was mainly found in extradomestic ecotopes where trypanosome infection rate reached 12.7%. Serological study of 98 local people showed that 29.6% were seroreactive; most of their houses were closed to wild biotopes colonized by T. sordida. Results indicate that there is an active T. infestans mediated transmission of Chagas disease in this zone that yields important human prevalence and that the populations of T. sordida in wild biotopes not only sustain the wild T. cruzi cycle but also represent an actual risk for people living in the area.
1998年和1999年，在阿根廷科连特斯省康塞普西翁市的三个地区进行了一项昆虫学和血清学调查，以确定参与恰加斯病家庭和野生传播的锥蝽种类。通过在随机选择的32所房屋和附近44个室外生态环境中进行人/小时捕获来收集锥蝽。通过对粪便进行直接显微镜观察（400倍）和聚合酶链反应来评估锥蝽中的克氏锥虫感染情况。用于人群的血清学技术为间接血凝试验和间接荧光试验。在28.1%的房屋和31.8%的野生生物群落中收集到了锥蝽。仅在室内发现了侵扰锥蝽（Klug，1834年），其中60%感染了克氏锥虫。污色锥蝽（Stål，1859年）主要在室外生态环境中发现，其锥虫感染率达到12.7%。对98名当地居民的血清学研究表明，29.6%呈血清反应阳性；他们的大多数房屋靠近被污色锥蝽定殖的野生生物群落。结果表明，该地区存在由侵扰锥蝽介导的活跃的恰加斯病传播，导致了重要的人群患病率，并且野生生物群落中的污色锥蝽种群不仅维持了野生克氏锥虫循环，而且对该地区的居民构成了实际风险。
