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Korean J. Vet. Serv. 2012; 35(4): 295-305
Published online December 30, 2012
https://doi.org/10.7853/kjvs.2012.35.4.295
© The Korean Socitety of Veterinary Service
김혜라;정지영;김선득;박준영;조인영;신성식;손창호;오기석;허태영;정영훈;최창용;서국현;
전남축산위생사업소;전남축산위생사업소;전남대학교 수의과대학;전남대학교 수의과대학;전남대학교 수의과대학;전남대학교 수의과대학;전남대학교 수의과대학;전남대학교 수의과대학;농촌진흥청 축산과학원;농촌진흥청 축산과학원;농촌진흥청 축산과학원;전남대학교 수의과대학;
Correspondence to : 전남대학교 수의과대학(College of Veterinary Medicine, Chonnam National University)
The aim of this study was to isolate microorganisms from half milk samples of dairy goats by California mastitis test (CMT) during the lactation period and to further investigate the susceptibility of isolated organisms to antimicrobial drugs. From a total of 235 half milk samples with CMT scores of 2 or above from 366 dairy goats distributed throughout Jeonnam province, microorganisms were isolated from 198 (83.5%) samples either singly (99.0%) or in combination (1.0%). The most prevalent microorganism was the coagulase-negative Staphylococcus spp., (44.4%, n=88) followed by Staphylococcus aureus (24.2%, n=48), Escherichia coli (11.1%, n=22) and Streptococcus spp. (7.6%, n=15). Isolated bacteria also included Bacillus spp. (2.5%, n=5), Pseudomonas spp. (2.5%, n=5), Micrococcus spp. (1.5%, n=3), Corynebacterium spp. (1.5%, n=3), Enterococcus facium (1.0%, n=2), Morganella morganii (0.5%, n=1) and Streptococcus agalactiae (0.5%, n=1). During the summer season, a high prevalence of all microorganisms were observed in which Staphylococcus spp. (30.8%), Escherichia coli (8.6%), and Streptococcus spp. (5.6%) were among the most prevalent bacteria isolated. Staphylococcus spp. was also shown to be high in the winter (21.7%). In most samples, the presence of bacterial pathogens in goat milk led to the increase in the total somatic cell count (SCC). Most of the half milk samples of dairy goats with bacterial contamination showed SCC of
Keywords Dairy goat,Mastitis,SCC,Bacteria,Antimicrobial susceptibility,
Korean J. Vet. Serv. 2012; 35(4): 295-305
Published online December 30, 2012 https://doi.org/10.7853/kjvs.2012.35.4.295
Copyright © The Korean Socitety of Veterinary Service.
김혜라;정지영;김선득;박준영;조인영;신성식;손창호;오기석;허태영;정영훈;최창용;서국현;
전남축산위생사업소;전남축산위생사업소;전남대학교 수의과대학;전남대학교 수의과대학;전남대학교 수의과대학;전남대학교 수의과대학;전남대학교 수의과대학;전남대학교 수의과대학;농촌진흥청 축산과학원;농촌진흥청 축산과학원;농촌진흥청 축산과학원;전남대학교 수의과대학;
Kim, Hye-Ra;Jung, Ji-Young;Kim, Seon-Deuk;Park, Jun-Young;Cho, In-Young;Shin, Sung-Shik;Son, Chang-Ho;Ok, Ki-Seok;Hur, Tai-Young;Jung, Young-Hun;Choi, Chang-Yong;Suh, Guk-Hyun;
Jeollanamdo Livestock Sanitation Office;Jeollanamdo Livestock Sanitation Office;College of Veterinary Medicine, Chonnam National University;College of Veterinary Medicine, Chonnam National University;College of Veterinary Medicine, Chonnam National University;College of Veterinary Medicine, Chonnam National University;College of Veterinary Medicine, Chonnam National University;College of Veterinary Medicine, Chonnam National University;National Institute of Animal Science, RDA;National Institute of Animal Science, RDA;National Institute of Animal Science, RDA;College of Veterinary Medicine, Chonnam National University;
Correspondence to:전남대학교 수의과대학(College of Veterinary Medicine, Chonnam National University)
The aim of this study was to isolate microorganisms from half milk samples of dairy goats by California mastitis test (CMT) during the lactation period and to further investigate the susceptibility of isolated organisms to antimicrobial drugs. From a total of 235 half milk samples with CMT scores of 2 or above from 366 dairy goats distributed throughout Jeonnam province, microorganisms were isolated from 198 (83.5%) samples either singly (99.0%) or in combination (1.0%). The most prevalent microorganism was the coagulase-negative Staphylococcus spp., (44.4%, n=88) followed by Staphylococcus aureus (24.2%, n=48), Escherichia coli (11.1%, n=22) and Streptococcus spp. (7.6%, n=15). Isolated bacteria also included Bacillus spp. (2.5%, n=5), Pseudomonas spp. (2.5%, n=5), Micrococcus spp. (1.5%, n=3), Corynebacterium spp. (1.5%, n=3), Enterococcus facium (1.0%, n=2), Morganella morganii (0.5%, n=1) and Streptococcus agalactiae (0.5%, n=1). During the summer season, a high prevalence of all microorganisms were observed in which Staphylococcus spp. (30.8%), Escherichia coli (8.6%), and Streptococcus spp. (5.6%) were among the most prevalent bacteria isolated. Staphylococcus spp. was also shown to be high in the winter (21.7%). In most samples, the presence of bacterial pathogens in goat milk led to the increase in the total somatic cell count (SCC). Most of the half milk samples of dairy goats with bacterial contamination showed SCC of
Keywords: Dairy goat,Mastitis,SCC,Bacteria,Antimicrobial susceptibility,