In Practice 4: 100-109 (1982)
© 1982 British Veterinary Association

Antibiotic residues in milk

Emphasis on the production of milk free from antibiotic contamination is likely to increase, with pressure coming from consumers, public health authorities and milk manufacturers. The interest of the EEC in the subject, and the progress made by some other European countries in this field, which can give added commercial advantages, will further reinforce the trend.

The practising arm of the veterinary profession has a very important role in advising farmers on the avoidance of contamination of milk with the antibiotic preparations which are prescribed. Apart from emphasising strict adherence to the recommendations of the data sheet, veterinary surgeons can assist their clients in avoiding antibiotic test failures and,therefore, substantial financial penalties, by advice which may include:

(1) Keep permanent records of all cows treated with antibiotics, especially those receiving intramammary treatment, both during lactation and in the dry period. Record charts are available from a number of manufacturers and from the Milk Marketing Board.

(2) Identify all treated cows, preferably by the use of tail tapes or colour marking the quarter treated.

(3) Take precautions to avoid contamination by residues from treated cows by either milking these last, using a separate bucket unit, or flushing the jar with cold water after rejecting the milk.

(4) Daily testing of the milk from any cow which is dry for a shorter period than that stated on the data sheet, or which has been treated with a dry cow preparation during lactation.

(5) If antibiotic contaminated milk does accidentally get into the bulk tank, telephone the local office of the Milk Marketing Board immediately. Compensation is available from the Board's insurance for a first claim in any one year.

Note:

The advice and assistance of colleagues within the Milk Marketing Board of England and Wales, and especially of R. J. Chamings, J. Davies, N. G. Chandler and F. Harding, have been greatly appreciated.