No abstract

The prevalences of antimicrobial residues were determined in cows * bulk raw milk from 16 collection centers, in pasteurized milk obtained from sale outlets, and in raw, pasteurized and sterilized milk in the processing line of a plant in Trinidad. The Delvotest SP 5 Pack test kits were used to detect the antimicrobial residues in milk. Thirty-one (10.3%) of 300 bulk milk samples contained antimicrobial residues with penicillin responsible for 90.3 % of all the positive samples which originated from 8 (50.0%) of the 16 collection centers.The prevalence of residues in pasteurized milk was 21.3% compared to 8.3% detected in sterilized milk. The difference was not statistically significant (P 2 0.05; X2). Pasteurized milk obtained from sale outlets but originating from two other processing plants had antimicrobial residue prevalence of 0% and 8.3 %, respectively. It is concluded that the presence of antimicrobial residues in raw and processed milk in Trinidad could be of public health and economic significance.A. ADESIYUN, L. WEBB and V . BALBIRSINGH All antimicrobial residues detected were penicillin Made up of 2 condensed milk samples and 22 liquid sterile milk Positive samples were detected in all UHT-F, UHT-M and UHT-L samples on sampling days that positive samples were observed also in R, BT and CP samples day