Chagas Disease Vector Control in Tupiza, Southern Bolivia

摘要: in southern Bolivia by the application of deltamethrin SC25 (2.5% suspension concentrate) at a target dose 25 mg a.i./m? Actual applied was monitored HPLC analysis ofjlterpupers placed various heights on house walls, and shown to rangefrom 0 59.6 about mean 28.5 a. i./ m? Wall bioassays showed high mortality T. infestans during the$rst month after deltamethrin. Mortality declined zero as summer temperatures increased, but reappeared with onset following winter. In contrast, knockdown apparent throughout trial, showing no discernible temperature dependence. House infestation rates, measured manual sampling use ofpaper sheets collect bugfaeces, from 79% beginning trial 6 evaluation. All one houses were stillfree the$nal evaluation 12 months spraying, although small number bugs werefound this time 5 355peridomest ic dependencies. Comparative cost studies endorse recommendation large-scale deltamethrin, or pyrethroid similar costeffectiveness, means eliminate domestic populations order interrupt transmission Chagas disease.