Abstract
To determine the prevalence and seasonal variation of Psoroptes ovis (Delafond, 1858) mange in goats in the semiarid region of Paraíba, 541 crossbred goats of both sexes and different ages were examined between June 1999 and May 2001 and between August 2011 and December 2012, by washing their ear canals.The monthly prevalence of the infestation varied between 66.66% and 100% without significant differences (p = 0.10) among months and years. The intensity of infestation was higher between 2011-2012 (p < 0.05), with an annual rainfall of 123 mm, than between 1999-2000, which had an annual rainfall of 614.9 mm. By the Spearman test there was a negative correlation between the relative humidity and the rainfall of the intensity of the P. ovis infestation. It is concluded that parasitism by P. ovis occurs at a similar prevalence rate during the entire year but increases during dry years.
Highlights
Mites of the genus Psoroptes are ectoparasites belonging to the order Astigmata, Family Psoroptidae that parasitizes many species of domestic and wild ruminants (YERUHAM et al, 1985)
The monthly prevalence of P. ovis infestation in goats of the mesoregion of Sertão of Paraíba varied between 66.6% and 100%, and there were no significant differences (p = 0.10) among the months and the periods in which the study was carried out (Table 1)
Comparing the intensity of P. ovis infestation in the goats slaughtered during the three years of collection of the mites and based on the mean, it was verified that mite parasitism was greater between 2011-2012 (p < 0.05) in comparison with the years between 1999-2000 (Table 1)
Summary
Mites of the genus Psoroptes are ectoparasites belonging to the order Astigmata, Family Psoroptidae that parasitizes many species of domestic and wild ruminants (YERUHAM et al, 1985). Psoroptes ovis (Delafond, 1858) is located in the auditory canal, which extends from the external auditory meatus to the beginning of the tympanic membrane. This parasite can be found in the epidermis and all evolutionary stages, where it feeds from secretions, exudate and eventually blood, causing. In addition to the possible economic losses caused by the parasitism, P. ovis transmits mycoplasmas
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