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(A) Prevalence of infestation by T. guasayana in frequent peridomestic ecotopes (wood piles, fences, and goat corrals) and number of frequent sites sprayed with pyrethroid insecticides. Numbers on top of bars refers to the total number of frequent sites surveyed. (B) Mean number of T. guasayana per positive site assessed by TMCs. Amamá, 1993–2002.
