Prevalence and Antimicrobial Resistance ofandin Fattening Pigs in Hubei Province, China.

Abstract

Pig is usually the carrier ofand, and can transmit the bacteria along the pork production chain to cause severe public health problems. In this study, we investigated the prevalence ofandin fattening pigs in Hubei Province, China. The overall prevalence ofin rectal swab among 896 samples from 22 farms was 17.30%, and that ofin nasal swab among 814 samples from 20 farms was 28.26%. Antimicrobial resistance (AMR) analysis showed that 95.33% of thestrains exhibited resistance to more than three classes of antimicrobial agents tested. The highest resistance proportions were for chloramphenicol (100%), sulfamethoxazole/trimethoprim (SXT) (100%), and tetracycline (TET) (93.46%), while the lowest proportions were for cefotaxime (37.38%), gentamicin (GEN) (34.58%), and ciprofloxacin (24.30%). On the other hand, 98.42% of thestrains were resistant to more than three classes of antimicrobial agents tested. The most common resistance among thestrains was against SXT (100.00%), followed by TET (98.43%), erythromycin (91.34%), and clindamycin (91.34%), while the lowest frequent resistances were against GEN (34.65%) and oxacillin (16.54%). The prevalence and AMR ofandexhibited an obvious diversity among different pig farms. Our results provided the epidemiological data for risk analysis of foodborne bacteria and AMR in pig farms.