Background: Chemical contamination in food has been a concern in public health both national and global levels. Contamination from pollution included air, water and soil, in meat from veterinary drugs used in animals, pesticides, food additives. Chemical residues in food are dangerous for health both short and long term. Commercial farming has grown, there are potential of using more drugs, especially antibiotics in farms. Objective: to study on antibiotic residues in fresh beef, fresh pork, fresh chicken and ready-to-drink dairy cow sold for consumers. Methods: A total of 36 samples which were 12 each of fresh meat, fresh pork and fresh chicken were tested by antibiotic residue detection kits from the Department of Medical Sciences, Thailand. These detection kits have 93% accuracy, 78.9% sensitivity, and 96.7% specificity. 72 samples of raw pork and chicken, which were advertised as organic, were tested for Tetracyclines, Macrolide, Aminoglycoside, Sulfonamide and Penicillins. Results: Tetracyclines, Macrolide, Aminoglycoside, Sulfonamide, Penicillins were detected in 12 samples of fresh beef, 12 samples of fresh pork, and 12 samples of fresh chicken. Tetracyclines were detected in 6 samples of dairy cow out of 43 samples. Conclusions: From 79 samples of fresh beef, fresh pork, fresh chicken and dairy cow, Tetracyclines, Macrolide, Aminoglycoside, Sulfonamide and Penicillin had been found in 100% of fresh beef samples, 100% of fresh pork, 100% of fresh chicken and 13.95 of dairy cow samples.

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