Distribution of domestic triatominae and stratification of Chagas Disease transmission in Oaxaca, Mexico
Distribution of domestic triatominae and stratification of Chagas Disease transmission in Oaxaca, Mexico
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DOI：
10.1046/j.1365-2915.2000.00214.x
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发表时间：
2000-03-01
影响因子：
1.9
通讯作者：
Carrillo, S
中科院分区：
文献类型：
--
作者：
Ramsey, JM;Ordoñez, R;Carrillo, S
墨西哥有18种锥蝽（半翅目：猎蝽科），据报道是克氏锥虫的媒介。恰加斯病在墨西哥很普遍，人输血的血清阳性率高达3.5%。根据急性和慢性病例报告以及国内昆虫学调查，瓦哈卡州是南美锥虫病流行史最长的州。然而，国家保健服务部门需要更多关于目前病媒传播风险的信息。为了确定和描述瓦哈卡的传播区域并对病媒潜力进行分层，1996- 1998年期间与初级保健服务机构和当地社区合作，对国内锥蝽亚科的分布情况进行了调查。对瓦哈卡570个城市中11%的村庄进行了研究。结果表明，在野外和近野外生境中发现8种锥蝽：巴氏锥蝽Triatoma barberi Usinger，锥蝽T. Bolivari Carcavallo et al. T. dimidiata（Latreille），T. mazzottii Usinger，T. nitida Usinger，T. pallidipennis（Stal）、黑翅叶蝉T. phyllosoma（Burmeister）和Rhodnius prolixus Stal.对于每种锥蝽在瓦哈卡，分布范围和栖息地特征进行了描述。栖息地分区，主要是基于海拔高度和年平均降水量，限制了物种之间的分布重叠。人类住区相对一致的海拔高度有利于个别物种在微区域内的扩散。利用房屋虫害的昆虫学指数估计，约有50%的人口（1874，320名居民）将面临病媒传播的风险，目前在瓦哈卡至少有134，320名感染者和40，280例慢性恰加斯病病例。
Mexico has 18 species of Triatomine bugs (Hemiptera: Reduviidae) reported to be vectors of Trypanosoma cruzi. Chagas Disease is widespread in Mexico, with up to 3.5% seropositivity of human transfusion blood. The State of Oaxaca has the longest history of endemic Chagas Disease, based on acute and chronic case reports, and of entomological surveys in the country. However, the State health care services need more information on current risks of vector transmission. In order to identify and characterize areas of transmission in Oaxaca and to stratify the vector potential, the distribution of domestic Triatominae was surveyed during 1996-98 in collaboration with the primary health care services and local communities. Villages were studied in 11% of 570 municipalities in Oaxaca. Eight triatomine species were found in domestic and peri-domestic habitats: Triatoma barberi Usinger, T. bolivari Carcavallo et al. T. dimidiata (Latreille), T. mazzottii Usinger, T. nitida Usinger, T. pallidipennis (Stal), T. phyllosoma (Burmeister) and Rhodnius prolixus Stal. For each triatomine species in Oaxaca, the range of distribution and habitat characteristics are described. Habitat partitioning, principally based on altitude and mean annual precipitation, limited the overlap of distribution between species. Relatively consistent altitude of human settlements facilitates the dispersion of individual species within microregions. Entomological indices of house infestation were used to estimate that similar to 50% of the human population (1874 320 inhabitants) would be at risk of vector transmission, with a minimum of 134 320 infected people and 40 280 chronic cases of Chagas Disease currently in Oaxaca.