A study on the drug residues in the raw milk collected over the withdrawal period after mastitis treatment using TTC-II test and delvotest SP
1999
Kang, J.H. | Kim, J.S. | Lee, W.C. (KonKuk University, Seoul (Korea Republic). School of Veterinary Medicine)
From July of 1997 to June of 1998, total 279 raw milk samples over wkthdarwal period after mastitis treatment from dairy farms located in the provinces of Kyonggi and Choongchung were collected to test drug residues. Each sample was tested by TTC-II test and Delvotest SP. Among the total 152 raw milk samples of cow treated by beta-lactams, 32 samples(21.2%) were positive on the Delvotest and 15 samples(9.9%) showed positive on the TTC-II test. Also, from the total 37 samples treated by sulfonamides, 5 samples(13.5%) were positive on the Delvotest and 3 samples(8.1%) showed positive on the TTC-II test. For the total 55 raw milk samples of cow treated by tetracyclines, 9 samples(16.4%) were positive on the Delvotest and 5 samples(9.1%) showed positive on the TTC-II test. In addition, from the total 35 samples treated by aminoglycosides, 7 samples(20.0%) were positive on the Delvotest and 5 samples(14.3%) showed positive on the TTC-II test. Our study shows that it is possible that drugs are to be detected by the drug residues test of and individual raw milk even over the withdrawal period after mastitis treatment and the raw milk of bulk tank.
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