Burchard L, Cáceres J, Sagua H, Inés Bahamonde M, Neira I, Araya J, Goycolea M
Departamento de Programas sobre el Ambiente, Servicio de Salud Antofagasta, Chile.
Bol Chil Parasitol. 1996 Jul-Dec;51(3-4):76-9.
In order to assess the impact of a control program against Triatoma infestans launched in 1988, based on insecticide spraying of dwellings, a serological survey for chagasic infection was carried out during 1995 in three localities from San Pedro de Atacama County (22 degrees 55' South lat., 68 degrees 12' West long.), II Region of Antofagasta in northern Chile. Blood samples from 531 children and adolescents and 65 dogs were subjected to ELISA test and indirect immunofluorescent test for Chagas' disease respectively. Tests resulted positive in 12 (2.3%) persons, all above 5 years old, in contrast with the 16.8% serological positivity observed in 1985. Three (4.6%) dogs (two 0-12 months old) resulted positive. These results indicate that dwelling sprayings with long-term activity insecticides against T. infestans is a good tool to prevent new human infections with T. cruzi. However, active vector transmission among domestic animals (canines) could be recently acquired.
为评估1988年启动的一项以住宅喷洒杀虫剂为基础的针对侵扰锥猎蝽的防控计划的影响，1995年在智利北部安托法加斯塔大区第二省圣佩德罗德阿塔卡马县（南纬22°55′，西经68°12′）的三个地点开展了恰加斯病感染的血清学调查。分别对531名儿童和青少年以及65只犬的血样进行了恰加斯病的酶联免疫吸附测定（ELISA）试验和间接免疫荧光试验。检测结果显示，12名（2.3%）人员呈阳性，均为5岁以上，相比之下，1985年观察到的血清学阳性率为16.8%。三只（4.6%）犬（两只0至12个月大）呈阳性。这些结果表明，使用具有长效活性的杀虫剂对住宅进行喷洒是预防人类新感染克氏锥虫的良好手段。然而，近期在家养动物（犬类）中可能出现了活跃的病媒传播。
