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Masters Theses
Date of Award
12-1990
Degree Type
Thesis
Degree Name
Master of Science
Major
Animal Science
Major Professor
James D. Quigley III
Committee Members
Craig R. Reinemeyer, Richard N. Heitmann
Abstract
Effects of lasalocid on coccidial infection and growth were examined using 16 Holstein bull calves. Animals were assigned randomly to a 2 x 2 factorial arrangement of starter containing 0 or 40 ppm lasalocid beginning at 3 d of age (SE = .46) and single oral infection with 0 or 30,000 oocysts (Eimeria bovis) at 28 d. Pelleted calf starter was fed for ad libitum consumption from d 1; milk replacer was fed at 3.6 kg/d to 28 d. Average daily gain, dry matter intake, and body weight were increased in calves fed lasalocid and decreased in calves dosed with coccidia. Addition of lasalocid to the feed improved gains by 8% in uninfected calves and by 50% in infected calves. Fecal oocyst numbers were increased by administration of coccidia and decreased by lasalocid. Calves infected with coccidia had greater fecal scores, indicating abnormal or diarrheic feces. Respiration, rectal temperature, hematocrit and serum sodium and potassium concentrations were unaffected by treatment. Data indicated that lasalocid minimized effects of coccidial challenge and increased growth in this study.
Recommended Citation
Sinks, Glendon Douglas, "Effects of lasalocid on coccidial infection and growth in young dairy calves. " Master's Thesis, University of Tennessee, 1990.
https://trace.tennessee.edu/utk_gradthes/7103