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The use of brilliant blue F.C.F and penicillin in udders of cows to be dried-off

Authors: J. T Feaghan and D. J. Dawson


It has already been shown (Dawson and Feaghan, 1960) that intramammary penicillin preparations dyed with Brilliant Blue F.C.F. can be successfully used in the lactating cow. Penicillin preparations are sometimes used to treat the udder of a cow when it is dried off. A experiment was therefore conducted to determine whether dyed penicillin preparations cause any damage to udder tissue under these conditions. It was considered that if damage occurred it would be reflected by lower milk yields in the following lactation. Milk yields were therefore used to measure any possible udder damage resulting from such treatment.

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