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Bioecology of Dermatobia hominis (Linnaeus Jr., 1781) in Palotina, Paraná, Brazil

This study was conducted at the Campus Palotina - UFPR, in three farms of Palotina county, Paraná State Brazil, between November (1997) and May (1999) with the intention to evaluate: a) the monthly fluctuation of Dermatobia hominis (Linnaeus Jr., 1781) larvae in Black and White Holstein bovines and the larvae distribution on the body surface and b) the seasonal distribution of diptera of D. hominis eggs vector. For insects collection two traps types were used: MAGOON and Wind Oriented Trap (WOT). A total of 346 D. hominis larvae were expelled by manual compression. By analyzing the nodules frequencies of D. hominis larvae in animals a significant difference (p> 0.001) relative to localization of parasites was observed. The infestation intensity was bigger in the left side of animals where a total of 240 nodules was observed, representing a relative frequency of 69.36%. According to the number of parasites it higher intensity, in three regions of animal’s body was found. The first region was composed by foreleg, chuck and ribs. The second one formed by neck and flanks and the last one by the pelvic members, abdomen, tail and thorax. During the experimental period, 5887 Diptera specimens were caught by MAGOON and WOT traps, classified in different Diptera families; the most abundant families were: Calliphoridae, Sarcophagidae and Muscidae.

Dermatobia hominis; larvae; bovines; vectors; seasonal

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