Abstracto
- A characterization of Pimeliaphilus zeledoni infestation on costarican Triatoma dimidiata was done. The prevalence of P. zeledoni on 47 collected bugs was 53.2%. The triatominae evolutive-forms that presented the highest levels of infestation were the 5° instar nymphs. The larvae were the more abundant forms of the mite (a 0.05). The coxae were the morphological sites of the bugs where the mites were preferentially located. There were not evidences of important pathogenic effects generated by the mites on the triatominae. This the reason because the biological control with this mite should be debated.