“…For the first category, SCT, SPI, CAP, SDO, LEU-A3, SM, CTM, SMM, SPD, SMZ, SMX, ASMZ, ERY, ROX and TC are commonly used to treat eye, urinary tract, lung and intestinal tract infections caused by bacteria or viruses [ 45 , 46 ] and thus likely have a human source [ 47 , 48 ]. SAL, SMR, MAR, OTC, SD, LIN, MON, FF and SCP are known or have been reported as antibiotics typical used in veterinary applications in previous studies [ 13 , 19 , 49 , 50 ]. Wetland Caohai is located on the southeast estuary of Caohai, with villages and farmlands concentrated nearby and about 109,000 people in surrounding Weining County.…”