在墨西哥尤卡坦半岛的一个农村社区中，捕获到的三带喙库蚊体内含有较高频率的人类血液，但人类的抗体血清阳性率和心电图检查结果均较低，与恰加斯病相符。
High frequency of human blood in Triatoma dimidiata captured inside dwellings in a rural community in the Yucatan Peninsula, Mexico, but low antibody seroprevalence and electrocardiographic findings compatible with Chagas disease in humans.
机构信息
Centro Investigaciones Biomédicas, Universidad Autónoma Campeche, Campeche, Mexico.
出版信息
Am J Trop Med Hyg. 2013 Mar;88(3):566-71. doi: 10.4269/ajtmh.12-0583. Epub 2013 Jan 7.
Abstract
We studied a small rural community of 411 inhabitants localized in the state of Campeche in the Yucatan Peninsula, Mexico. In 44 collected triatomines captured inside the houses, human feeding source was revealed in 23 of 44 (52%) samples, and chicken feeding source was revealed in 16 of 44 (36%) samples. In a set of 29 triatomines, mouse was the feeding source in 13 (44%) samples, and dog was the feeding source in 7 (24%) samples. Infection index with Trypanosoma cruzi in collected triatomines was 38%, and all parasites belonged to discrete type unit I. Inhabitants referred high contact with triatomine's bite in 60 of 128 (47%) samples, but seroprevalence was 2.3% (3/128). Evidence of electrocardiographic alteration compatible with Chagas disease was observed only in one asymptomatic seropositive subject. In conclusion, Triatoma dimidiata in this region are preferentially infected with T. cruzi I and feed on human beings with relative high frequency, but seroprevalence and Chagas disease in humans is relatively low.
摘要
我们研究了一个位于墨西哥尤卡坦半岛坎佩切州的 411 名居民的小型农村社区。在 44 只捕获的室内锥蝽中，有 23 只（52%）的样本显示人类是其吸血来源，16 只（36%）的样本显示鸡是其吸血来源。在 29 只锥蝽中，有 13 只（44%）的样本的吸血来源是老鼠，7 只（24%）的样本的吸血来源是狗。采集到的锥蝽感染克氏锥虫的感染指数为 38%，所有寄生虫均属于离散型单位 I。在 128 名居民中，有 60 名（47%）报告称曾被锥蝽叮咬过，但血清阳性率仅为 2.3%（3/128）。只有一名无症状的血清阳性者观察到符合恰加斯病的心电图改变证据。总之，该地区的 T. dimidiata 优先感染 I 型克氏锥虫，并且以相对较高的频率吸食人类血液，但人类的血清阳性率和恰加斯病相对较低。
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