1Departamento de Medicina Tropical, Instituto de Investigaciones en Ciencias de la Salud (IICS), Universidad Nacional de Asunción, Campus Universitario, San Lorenzo, Paraguay.
2Universidade Estadual Paulista "Júlio de Mesquita Filho" (UNESP), Instituto de Biociências de Botucatu, Rua Dr. Antônio Celso Wagner Zanin, Distrito de Rubião Junior, Botucatu, SP, Brazil.
Am J Trop Med Hyg. 2021 Jun 7;105(1):130-133. doi: 10.4269/ajtmh.20-1454.
Approximately 150,000 people are living with Chagas disease in Paraguay. Although the country has been since 2008 considered as one of the countries that succeeded in interrupted the vector transmission of Chagas by Triatoma infestans in houses of the eastern region, there are nine other species notified in the country that are potential vectors and also deserve attention from vector control programs. Thus, we carried out an entomoepidemiological study of T. sordida in the eastern and western regions of the country and we developed an identification key for Paraguay's triatomines based on cytogenetic data. Between the years 2003 to 2004, 271 specimens of T. sordida were captured in domestic, peridomestic, and wild ecotopes, with 131 insects caught in the eastern (Alto Paraguay, Boquerón and Pte. Hayes) and 140 in the western region of Paraguay (Guairá and Paraguarí). High rates of peridomicillary infestation were observed for both regions. Besides that, the natural infection of the captured insects was detected by optical microscopy in 12% and 10%, and by PCR in 21% and 20% in the eastern and western regions, respectively. Based on cytogenetic data from nine of ten species notified in Paraguay, an identification key was developed to differentiate all taxa. Thus, given the vectorial importance of T. sordida, we highlight the need for continued attention from Paraguay's vector control programs for this species. Further, we provide a taxonomic key that assists in the correct classification of Paraguayan triatomines.
在巴拉圭，大约有 15 万人患有恰加斯病。尽管自 2008 年以来，该国一直被认为是成功阻断东部地区房屋中三带喙库蚊传播恰加斯病的国家之一，但该国还有另外 9 种被通报的潜在传播媒介，也值得关注。因此，我们对该国东部和西部的 T. sordida 进行了昆虫流行病学研究，并根据细胞遗传学数据为巴拉圭的锥蝽编制了鉴定手册。2003 年至 2004 年间，在家庭、半家庭和野外生境中捕获了 271 只 T. sordida 标本，其中 131 只在东部（上巴拉圭、博克龙和海耶斯）捕获，140 只在巴拉圭西部（瓜伊拉和帕拉瓜里）捕获。两个地区的半家庭侵染率都很高。此外，光学显微镜检测到捕获昆虫的自然感染率分别为东部地区的 12%和西部地区的 10%，PCR 检测到的感染率分别为东部地区的 21%和西部地区的 20%。根据巴拉圭通报的十种锥蝽中的九种的细胞遗传学数据，开发了一种鉴定手册，以区分所有分类群。因此，鉴于 T. sordida 的媒介重要性，我们强调需要继续关注巴拉圭的媒介控制计划。此外，我们提供了一个分类学关键，以帮助正确分类巴拉圭的锥蝽。
