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首页> 外文期刊>The American Journal of Tropical Medicine and Hygiene >A prospective study of the effects of sustained vector surveillance following community-wide insecticide application on Trypanosoma cruzi infection of dogs and cats in rural Northwestern Argentina.
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A prospective study of the effects of sustained vector surveillance following community-wide insecticide application on Trypanosoma cruzi infection of dogs and cats in rural Northwestern Argentina.

机译：在社区西北地区应用杀虫剂后进行持续媒介监测对阿根廷西北部农村地区的猫科动物锥虫感染的前瞻性研究。

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摘要

Domestic dogs were used as natural sentinels to assess prospectively the long-term impact of selective, community-based spraying with pyrethroid insecticides after community-wide spraying on transmission of Trypanosoma cruzi in rural villages under surveillance between 1992 and 2002. In 2000 and 2002 light infestations by Triatoma infestans were recorded, and 523 dogs and cats were examined serologically or by xenodiagnosis. The prevalence of T. cruzi infection in dogs decreased from 65% at baseline to 8.9% and 4.7% at 7.5 and 10 years after sustained vector surveillance, respectively. The average annual force of infection dropped 260-fold from 72.7 per 100 dog-years at baseline to <0.3% in 2002, as determined prospectively and retrospectively from the age-prevalence curve of native dogs born during surveillance. Multiple logistic regression analysis showed that prevalent cases in dogs in 2000 and 2002 were associated positively and significantly with the peak number of T. infestans caught in domestic areas at the dog's compound during its lifetime. The sustained decline in T. cruzi infections in dogs and cats is the result of selective, community-based insecticide spraying that kept the abundance of infected T. infestans at marginal levels, fast host population turnover, and low immigration rates from areas with active transmission.
机译：家犬被用作天然前哨动物，以前瞻性评估在1992年至2002年间进行监测的农村社区选择性喷洒拟除虫菊酯类杀虫剂对社区锥虫传播的长期影响。2000年至2002年，记录了由三角藻感染引起的侵染，并通过血清学或异种诊断检查了523只狗和猫。在持续的媒介物监测后，犬的克氏锥虫感染的患病率分别从基线的65％降低到7.5年和10年的8.9％和4.7％。根据监测期间出生的本地狗的年龄流行率曲线，前瞻性和回顾性地确定，2002年的平均年感染力从基线的每100狗年72.7下降了260倍，降至2002年的<0.3％。多元logistic回归分析显示，2000年和2002年狗中的流行病例与该犬舍一生中在家庭区域捕获的T. infestans高峰数量呈显着正相关。狗和猫的克鲁斯氏锥虫感染持续下降的原因是选择性的，社区喷洒杀虫剂的喷洒，这使受感染的T. infestans的丰度保持在边际水平，寄主种群周转速度快以及活跃传播地区的移民率低。

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