Antimicrobial susceptibility and prevalence of gram-negative bacteria isolated from bovine mastitis
2007
Lee, E.S. (Konkuk University, Seoul, Republic of Korea) | Kang, H.M. (National Veterinary Research and Quarantine Service, Anyang, Republic of Korea) | Chung, C.I. (Konkuk University, Seoul, Republic of Korea) | Moon, J.S. (National Veterinary Research and Quarantine Service, Anyang, Republic of Korea), E-mail: moonjs@nvrqs.go.kr
Environmental mastitis has increased particularly in well-managed or low somatic cell count herds that have successfully controlled contagious pathogens. Major pathogens of environmental mastitis are Escherichia coli (E. coli) and Streptococcus uberis. The present study was conducted to investigate the isolation and antibiotic susceptibility of 406 (21.8%) gram-negative bacteria isolated mastitis milk from 1,865 quaters of 241 Korean dairy farms from 2001 to 2004. Prevalence of major gram-negative bacteria isolated from mastitis milk were E. coli (22.7%) and Enterobacter spp. (16.3%) in coliforms and Pseudomoas spp. (10.3%) and Serratia spp. (7.9%) in non-coliforms.
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