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

Abstract

Summary 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.