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Aureomycin Concentration in Milk Following Intramammary Infusion and its Effect on Starter Activity¹

Virginia Polytechnic Institute, Agricultural Experiment Station, Blacksburg

ABSTRACT

The aureomycin content in the samples collected up to 48 hr. after infusion seriously interfered with the starter activity when the inoculated milk was held at 21° C. for 16 hr., even though the milk was autoclaved. The antibiotic level in the samples collected up to 24 hr. after infusion suppressed the starter when the inoculated sample was held for 3.5 hr. at 37.5° C, although the sample had been autoclaved prior to inoculation. Marked inhibitory effect was obtained up to 72 hr. after infusion when the raw milk was inoculated directly and held for 3.5 hr. at 37.5° C.

¹ The technical assistance of Miss H. Jordan, Mrs. G. W. DeHaven, and E. A. Sandy is hereby acknowledged.

² Department of Biology.

³ Department of Dairy Husbandry.

This article has been cited by other articles:

				M. O. Haq, L. L. Rusoff, and A. J. Gelpi Jr. Antibiotic Feed and Vitamin B12 Supplements for Lactating Dairy Cows Science, February 22, 1952; 115(2982): 215 - 216. [PDF]