Obara Marcos Takashi, Otrera Vanessa Camargo Garbeloto, Gonçalves Rodrigo Gurgel, Santos Janduhy Pereira dos, Santalucia Marcelo, Rosa João Aristeu da, Almeida Paulo Silva de, Barata José Maria Soares
Laboratório de Entomologia Médica, Secretaria de Vigilância em Saúde, Ministério da Saúde, Brasília, DF.
Rev Soc Bras Med Trop. 2011 Mar-Apr;44(2):206-12. doi: 10.1590/s0037-86822011005000004. Epub 2011 Mar 18.
Triatoma sordida Stål, 1859 populations were investigated for susceptibility to deltamethrin.
This study aimed to analyze the resistance of 11 populations of insects from the States of Goiás, Mato Grosso and Mato Grosso do Sul by topical application bioassays.
The estimated LD50 and RR50 showed high levels of susceptibility (LD50 < 1 and RR50 < 2). However, analysis of the slope of the dose response curve showed that the populations of insects in the towns of Firminópolis/GO, Posse/GO, Poxoréu/MT, Douradina/MS and Aparecida do Taboado/MS present great probability of evolving resistance and, thus, are more likely to tolerate treatment with deltamethrin.
Small changes in susceptibility and low levels of resistance were detected, but the temporal changes of susceptibility should be continuously monitored to adequately guide the actions of vector-control of DC.
对1859年命名的污色锥蝽种群进行了溴氰菊酯敏感性调查。
本研究旨在通过局部应用生物测定法分析来自戈亚斯州、马托格罗索州和南马托格罗索州的11个昆虫种群的抗性。
估计的半数致死剂量（LD50）和抗性比值（RR50）显示出高敏感性水平（LD50 < 1且RR50 < 2）。然而，对剂量反应曲线斜率的分析表明，菲尔米诺波利斯/戈亚斯州、波塞/戈亚斯州、波索雷乌/马托格罗索州、多拉迪纳/南马托格罗索州和阿帕雷西达-杜塔博阿多/南马托格罗索州城镇的昆虫种群极有可能产生抗性，因此更有可能耐受溴氰菊酯处理。
检测到敏感性有微小变化且抗性水平较低，但应持续监测敏感性的时间变化，以充分指导恰加斯病病媒控制行动。
