Instituto Nacional de Salud, Bogotá, DC, Colombia.
Rev Saude Publica. 2011 Aug;45(4):773-80. doi: 10.1590/s0034-89102011005000037. Epub 2011 Jun 10.
To calculate triatomine infestation indices in indigenous communities in Colombia.
A descriptive study was carried out in 19 communities in Valledupar Municipality, Cesar Department, Colombia. During June to December, 2007, triatromine bugs were collected from their resting places in households. Taxonomic identification was made according to the keys by Lent & Wygodzinsky. An infection process in animal model and isozyme analysis of triatomine feces were performed.
Rhodnius prolixus showed a density index of 154.7%, for Triatoma dimidiata was 102.45%, T. maculata 109.25% and Panstrogylus geniculatus 0.3%. The mean infestation index was 40.54%, and mean Trypanosoma infection index was 9.4%. Of five hemocultures positive for T. cruzi, three were enzimatically identified as T. cruzi group I. Biopsies revealed few pathologic characteristics of infective process with these strains isolated from domiciliary triatomine bugs.
The high triatomine infestation indices in households and the T. cruzi infection index are evidence of active transmission of Chagas disease. The situation merits a vector control program and serological survey of the population at risk. The genetic characterization of T. cruzi strains as group I agrees with other findings on strains in this region of Colombia.
计算哥伦比亚土著社区中的锥蝽感染指数。
在哥伦比亚塞萨尔省巴耶杜帕尔市的 19 个社区进行了一项描述性研究。2007 年 6 月至 12 月期间，从家庭的休息场所收集了三锥虫。根据 Lent 和 Wygodzinsky 的关键对分类鉴定进行了鉴定。在动物模型中进行了感染过程和三锥虫粪便的同工酶分析。
Rhodnius prolixus 的密度指数为 154.7%，Triatoma dimidiata 为 102.45%，T. maculata 为 109.25%，Panstrogylus geniculatus 为 0.3%。平均感染指数为 40.54%，平均 Trypanosoma 感染指数为 9.4%。在 5 份 T. cruzi 阳性的血培养物中，有 3 份经酶鉴定为 T. cruzi 组 I。活检显示，这些从家庭三锥虫中分离出的菌株引起的感染过程的病理特征很少。
家庭中三锥虫的高感染指数和 T. cruzi 的感染指数表明，恰加斯病的传播仍在活跃进行。这种情况需要进行病媒控制计划和高危人群的血清学调查。T. cruzi 株作为组 I 的遗传特征与哥伦比亚该地区其他菌株的发现一致。
