title: Effect of increased levels of urea in the diet on ruminal protozoal counts in four ruminant species.
mesh_terms: D000284:Administration, Oral; D000818:Animals; D002020:Buffaloes / Q000382:microbiology*; D002417:Cattle / Q000382:microbiology*; D016798:Ciliophora / Q000254:growth & development; D004032:Diet; D056890:Eukaryota / Q000254:growth & development*; D006041:Goats / Q000382:microbiology*; D012417:Rumen / Q000382:microbiology*; D012756:Sheep / Q000382:microbiology*; D014508:Urea / Q000008:administration & dosage / Q000378:metabolism*
chemical_list: D014508:Urea