Lauricella M A, Sinagra A J, Paulone I, Riarte A R, Segura E L
Rev Inst Med Trop Sao Paulo. 1989 Mar-Apr;31(2):63-70. doi: 10.1590/s0036-46651989000200001.
The population dynamics and the prevalence of chagasic infection of 352 dogs living in 108 rural houses infested by triatomines were studied. The region was divided into three sections according to increasing distances to an urban area. Each animal was identified by means of its particular characteristics and built, and its owners gave information about its habits. By means of xenodiagnosis, serology and ECG studies, prevalences of infection, parasitological-serological correlation, percentage of altered electrocardiographic outlines and percentage of houses with parasitemic dogs, were determined. The rural area showed a characteristic T. cruzi infection pattern and differences in the canine population parameters with respect to the other areas were observed: a higher proportion of puppies than adult dogs, a more sedentary population, higher prevalences of infection, as measured by xenodiagnosis, in dogs, and the highest proportion of bedroom insects infected with T. cruzi. It is assumed that the sedentary characteristics of the human population in that rural area impinge in the blood offer to the triatomine population, and the high percentage of parasitemic dogs of the area, contribute to the rise of "kissing bugs" infected with T. cruzi found in bedrooms.
对生活在108所受锥蝽侵扰的农村房屋中的352只狗的锥虫感染流行情况及种群动态进行了研究。该地区根据与市区距离的增加分为三个区域。每只动物都通过其独特特征和体型进行识别，其主人提供有关其习性的信息。通过异种诊断、血清学和心电图研究，确定了感染率、寄生虫学与血清学的相关性、心电图轮廓改变的百分比以及有寄生虫血症犬只的房屋百分比。农村地区呈现出典型的克氏锥虫感染模式，并且观察到犬类种群参数与其他地区存在差异：幼犬比例高于成年犬；种群更为定居；通过异种诊断测得的犬类感染率更高；卧室中感染克氏锥虫的昆虫比例最高。据推测，该农村地区人类种群的定居特性影响了锥蝽种群的血液供应，且该地区寄生虫血症犬只的高比例促成了卧室中感染克氏锥虫的“接吻虫”数量的增加。
