Ciliate protozoa in the rumen of the lactating cow.
D000821:Animal Feed / Q000032:analysis*; D000818:Animals; D002417:Cattle / Q000502:physiology*; D016798:Ciliophora / Q000302:isolation & purification*; D005260:Female; D007774:Lactation; D011247:Pregnancy; D012417:Rumen / Q000382:microbiology*