calves, coccidilosis, shipping stress, parasites
Two trials were conducted to evaluate antibiotic therapies for feeder calves originating in western South Dakota. In Trial 1, processing-anthelmintic treatment 28 days before weaning reduced ranch gains and provided no advantage in feedlot gains when calves were reprocessed. Processing included deworming, grubicide treatment, implanting and vaccination. Sulfamethazine medication caused transient improvements in feedlot performance during the feedlot receiving period in both trials. Supertherapeutic treatment with AS 700 offered no advantage in feedlot performance over therapeutic feeding in these calves. Sulfamethazine exposure suppressed coccidia oocyst shedding and appears to be an effective means of controlling coccidiosis and shipping fever complex for newly received calves.
Number of Pages
South Dakota State University
Copyright © 1989 South Dakota State University
Pritchard, R.H.; Thomson, J.U.; and Robbins, M.A., "Preweaning Processing Anthelmintic Treatment and Post weaning Effects of Sulfamethazine Based Medications on Performance Traits and Oocyst Shedding in Weaned Calves" (1990). South Dakota Beef Report, 1990. 12.