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  • Title: Effects of supplemental tallow on rumen ciliated protozoa in feedlot cattle.
    Author: Towne G, Nagaraja TG, Brandt RT, Gramlich SM.
    Journal: Arch Tierernahr; 1991 Feb; 41(2):203-7. PubMed ID: 2053841.
    Abstract:
    Ruminal samples were collected at slaughter from 98 steers consuming a high-grain diet and receiving either no fat, or 2, 4, 6, or 8% supplemental tallow. Tallow supplementation tended (P = 0.11) to increase average ciliated protozoan numbers, however, the occurrence of defaunated animals was higher in the 8% fat treatment than in the control group. Entodinium spp. were the only protozoans that survived in all treatments, and total numbers ranged up to 3.2 x 10(6)/g of ruminal contents. Although increasing tallow supplementation induced a defaunating effect in many animals, the response was unpredictable and protozoa occasionally proliferated irrespective of fat level.
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