Surveillance of Antibiotic Resistance among Escherichia coli Isolated from Swine in Different Areas of Sichuan Province

[Objective] To get messages of antibiotic resistance in swine E.coli isolates from different areas in Sichuan province.[Method] Antibiotic resistance of 232 E.coli isolates from different pig farms in Sichuan province to 32 antimicrobial agents was surveyed.Broth microdilution method according to the recommendation of the CLSI was used.[Result] Lower antibiotic resistance rate(≤15.52%) against ceftiofur,cefazolin,amikacin,and higher antibiotic resistance rate(42%-97%) against the other 28 agents were observed in 232 E.coli isolates,respectively.98.7% of all isolates possessed multi-drug resistance.To some antibiotics,the antibiotic resistance of E.coli isolates from large scale farms was more serious than isolates from individual farms.[Conclusion] Antibiotic resistance among the E.coli isolates to most of the antimicrobial agents is existed.