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Occurrence of 10 antibiotics in the Yuen Long (YLR), Kam Tin (KTR), and Shing Mun (SMR) rivers of Hong Kong and possible influence of livestock activities on the concentrations of antibiotics were investigated. Tetracycline (30–497 ng/L), sulfadiazine (2–80 ng/L), sulfamethoxazole (2–152 ng/L), ofloxacin (5–227 ng/L), and erythromycin (1–315 ng/L) were detected in all the three rivers; chlortetracycline...
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