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Kansas Agricultural Experiment Station Research Reports
1989; Kansas Agricultural Experiment Station contribution; no. 89-567-S; Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 567; Beef; Fecal thiaminase; Cattle; Feedlot
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Fecal Thiaminase In Feedlot Cattle, T.D. Hays, B.E. Brent
Fecal Thiaminase In Feedlot Cattle, T.D. Hays, B.E. Brent
Kansas Agricultural Experiment Station Research Reports
Fecal thiaminase was measured on 152 feedlot cattle at three locations and on a variety of rations. No animals showed signs of polioencephalomalacia. Thiaminase activities ranged from 0.6 to 430 µmol thiamin destroyed per minute per liter of feces (µmol/min/l). Eighty-two percent of the thiaminase activities were below 20 µmol/min/l, and only 3 percent were less than 2 µmol/min/l. High levels of fecal thiaminase were apparently not related to ration. Thiaminase was detected in all animals studied, but one location had only minimal levels. When high levels of thiaminase were found, the samples were re-assayedt and the enzyme was confirmed …