References
- Bunyan , J. , Jeffries , L. , Sayers , J.R. , Gulliver , A.L. and Coleman , K. 1977 . Antimicrobial substances and chick growth promotion: the growth‐promoting activity of antimicrobial substances including fifty‐two used either in therapy or as dietary additives . British Poultry Science , 18 : 283 – 294 .
- Dafwang , I.I. , Cook , M.E. and Sunde , M.L. 1987 . Interaction of dietary antibiotic supplementation and stocking density on broiler chick performance and immune response . British Poultry Science , 28 : 47 – 55 .
- Dafwang , L.L. , Cook , M.E. , Sunde , M.L. and Bird , H.R. 1985 . Bursal, intestinal and spleen weights and antibody response of chicks fed subtherapeutic levels of dietary antibiotics . Poultry Science , 64 : 634 – 639 .
- Gast , R.K. and Stephens , J.F. 1988 . Effects of Kanamycin administration to poultry on the proliferation of drug‐resistant Salmonella . Poultry Science , 67 : 689 – 698 .
- Gast , R.K. , Stephens , J.F. and Foster , D.N. 1988 . Effects of Kanamycin administration to poultry on the interspecies transmission of drug resistant Salmonella . Poultry Science , 67 : 699 – 706 .
- Glick , B. 1979 . The avian immune system . Avian Disease , 23 : 282 – 289 .
- Jukes , T.H. 1977 . The history of the antibiotic growth effect . Federation Proceedings American Society of Experimental Biology , 36 : 2514 – 2518 .
- Lukert , P.D. , Leonard , J. and Davis , R.B. 1975 . Infectious bursal disease virus:antigen production and immunity . American Journal of Veterinary Research , 36 : 539 – 540 .
- Marusich , W.L. , Ogrinz , E.F. , Brown , P.R. and Mitrovic , M. 1973 . Comparative efficacy of intermittent and continous feeding of four antibiotics at low levels in broilers . Poultry Science , 52 : 1774 – 1779 .
- Marusich , W.L. , Ogrinz , E.F. , Camerlengo , N. and Mitrovic , M. 1978 . Use of rye‐soybean ration to evaluate growth promotants in chickens . Poultry Science , 57 : 1297 – 1304 .
- Salisbury , C.D.C. , Rigby , C.E. and Chan , W. 1989 . Determination of antibiotic residues in Canadian slaughter animals by thin‐layer chromatography‐bioautography . Journal of Agricultural and Food Chemistry , 37 : 105 – 108 .
- Smith , H.W. 1975 . Clinical problems of preventative medicine—antibiotic‐resistant bacteria in animals: The dangers to human health . World's Poultry Science Journal , 31 : 104 – 115 .
- Stutz , M.W. and Lawton , G.C. 1984 . Effects of diet and antimicrobials on growth, feed efficiency, intestinal Clostridium perfringens and ileal weight of broiler chickens . Poultry Science , 63 : 2036 – 2042 .
- Present address: Memorial University of Newfoundland, St. Johns, Newfoundland, Canada.