Authors : Yu-Na Jang, Byeong-Yeal Jung, Suk-Chan Jung, Sook-Kyung Lim, Ji-Yong Hwang, Chul-Song Park and Gil-Jae Cho
Abstract: This study was analyzed and explained about antimicrobial resistance distribution and those mechanisms for 81 Escherichia E. coli isolates from diseased porcine feces and boar semen. In the study of 41 E. coli isolates from boar semen they showed high resistance to some antibiotics such as sulfamethoxazole (100%), tetracyclin (100%), streptomycin (92.7%), trimethoprim (80.5%). However, they showed high susceptibilities to others antibiotics such as colistin (97.6%), amikacin (100%), ceftiofur (100%). On the other hand, 40 E. coli isolates from feces of diseased pigs resisted strongly to various antibiotics such as sulfamethoxazole (100%), chloramphenicol (100%), tetracyclin (97.5%), ampicillin (97.5%), spectinomycin (95%), streptomycin (95%), nalidixic acid (95%), kanamycin (92.5%), kanamycin (92.5%), trimethoprim (92.5%), apramycin (90%), florfenicol (82.5%), enrofloxacin (82.5%) and gentamicin (80%) but they showed high susceptibilities to some antibiotics such as ceftiofur (90%), amikacin (100%), colistin (100%). E. coli isolates from diseased porcine feces showed higher antimicrobial resistance with most of antibiotics than E. coli isolated from boar semen. In this study, 6 types of aminoglycoside resistance genes, between 8 types aminoglycoside resistance genes are detected from boar semen isolates and diseased porcine feces isolates (n = 42/81, 51.9%). Those types of genes are detected in diseased porcine feces isolates (95%) 9.5 times higher than boar semen isolates (9.8%). In this study, even if E. coli isolates from boar semen showed lower antimicrobial resistance than E. coli isolates from feces of diseased pigs. E.coli isolates from boar semen showed high antimicrobial resistance with most of antibiotics. In conclusion, the detection rates for antibiotics resistance genes has been increased internationally for several decades. Therefore, many livestock industries and associates are needed to start monitoring antimicrobial resistance changes consistently for proper selection of antibiotics and managing them efficiently.
Yu-Na Jang, Byeong-Yeal Jung, Suk-Chan Jung, Sook-Kyung Lim, Ji-Yong Hwang, Chul-Song Park and Gil-Jae Cho, 2017. Characteristics of Antimicrobial Resistance in Escherichia Coli Isolated from Fecal and Semen of Pigs. Journal of Animal and Veterinary Advances, 16: 78-86.