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Influence of Aspiration Biopsy of Liver on Cattle Gains and Liver Vitamin A Values

Illinois Agricultural Experiment Station, Urbana

Abstract

Data from two studies were used to evaluate the influence of aspiration biopsy of the liver on cattle gains and liver vitamin A concentration. The liver biopsy procedure used did not significantly influence either gains or liver vitamin A status of beef cattle. Cattle consuming ad libitumalfalfa hay did not maintain liver vitamin A concentrations. Rate of gain of cattle did not significantly alter levels of liver vitamin A.

¹ Assistant Professor of Animal Science and Professor of Veterinary Medicine, Dixon Springs Agricultural Center, Simpson, Illinois, respectively.

² Present address: Ralston Purina Company, St. Louis, Missouri.

³ Injectable vitamin A contained 500,000 I. U. of vitamin A per ml., with 4% polysorbate 80, 2% benzyl alcohol, 0.75% butylated hydroxytoluene and 0.75% butylated hydroxanisole in a modified vegetable oil base.