Effect of virginiamycin on carbohydrate and protein metabolism in the rumen in vitro.
The effect of virginiamycin in incubations of rumen fluid with carbohydrate or protein substrate was investigated. In carbohydrate incubations, methane production was partially inhibited while propionate proportions increased. Total microbial growth was slightly decreased, but net microbial growth was considerably lower. Protein degradation was slightly lowered after addition of virginiamycin. These effects were compared with results obtained with other rumen manipulating additives.
D000818:Animals; D050260:Carbohydrate Metabolism; D004305:Dose-Response Relationship, Drug; D005285:Fermentation / Q000187:drug effects; D008297:Male; D011506:Proteins / Q000378:metabolism*; D012417:Rumen / Q000378:metabolism* / Q000382:microbiology; D012756:Sheep; D014769:Virginiamycin / Q000008:administration & dosage*
D011506:Proteins; D014769:Virginiamycin