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Microb Drug Resist. 2009 Jun;15(2):139-42. doi: 10.1089/mdr.2009.0901.

CTX-M-type beta-lactamase in Escherichia coli isolated from sick animals in Korea.

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National Veterinary Research and Quarantine Service, Ministry of Agriculture and Forestry, Anyang, Kyonggido, Republic of Korea.


About 408 Escherichia coli were isolated from sick farm animals and pets during 2003-2006. Of these isolates, four strains showed resistance to third-generation cephalosporins. The bla(CTX-M-14) gene was encountered in three E. coli strains, each of which were isolated from two cows and a dog, respectively, and bla(CTX-M-15) was identified in an E. coli isolated from a pig. All bla(CTX-M) genes were found to be transferred. The pulsed-field gel electrophoresis pattern indicated that the CTX-M-type beta-lactamase-producing E. coli isolates were genetically diverse. This study shows the emergence of CTX-M-type beta-lactamase-producing E. coli in animals for the first time in Korea. Study results suggest the need for awareness and comprehensive monitoring of extended-spectrum beta-lactamases in animals because gene transfer can occur between animals as well as humans.

[Indexed for MEDLINE]

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