| The effects that parasites can have on cattle vary from unperceivable drains on energy to the untimely death of the host. Within this range, parasites have caused significant economic losses in cattle production in the United States. To better understand parasitism of cattle (Bos taurus and Bos indicus) in central Texas on the Eastern Edwards Plateau, 240 cattle from two habitat groups, feedlot and range environments, were sampled for ectoparasites and endoparasites over the course of one year. Ten cattle from each habitat type were sampled each month over a year to account for any seasonal variability that might exist. Parasites were collected by direct fecal collection for endoparasites and external body examination for the recovery of ectoparasites. Ectoparasites reported include lice (Mallophaga and Anoplura), ticks (Argasidae and Ixodidae) and mites (Acari). Endoparasitic ova reported include Strongyloides sp. and Coccidia-type parasites. Prevalence, mean intensity, and abundance of endoparasites and ectoparasites found on cattle are reported for each sample group. A comparison of parasites per group found no seasonal variation among ectoparasites recovered regardless of habitat. Three endoparasites species (Eimeria sp., Ostertagia ostertagi, and Strongyloides sp.) showed seasonal variation both overall and specifically in feedlot habitats, with higher numbers occurring during the winter and spring months and lower numbers during the fall months. A more extensive study on the parasites of the Edwards Plateau would help to gain a better understanding of their seasonal patterns and at what numbers they are occurring so that cattle owners may more effectively treat and manage their cattle. |
