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KMID : 1023520110340040361
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Korean Journal of Veterinary Service
2011 Volume.34 No. 4 p.361 ~ p.368
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Isolation and antimicrobial susceptibility of microorganisms from milk samples of healthy postpartum sows
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Kim Seong-Tae
Shin Sung-Shik
Son Chang-Ho
Ok Ki-Seok
Suh Guk-Hyun
Kim Seon-Deuk
Park Jun-Young
Cho In-Young
Jung Ji-Young
Choi Jong-Song
Lee Ju-Dan
Hur Tai-Young
Choi Chang-Yong
Jung Young-Hun
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Abstract
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The growth rate of piglets will be decreased and the mortality of piglets will be increased in the postpartum sow with mastitis. The aim of this study was to isolate microorganisms from milk samples found in postpartum sows with suckling piglets and to further investigate antimicrobial susceptibility against isolated bacteria. Milk samples were collected from 567 udders of 42 lactating sows and the isolated bacteria was then identified. Isolated bacteria were tested with 12 antimicrobial agents. Bacteria were isolated from 260 milk samples (64.5%). Staphylococcus spp. were the most common microorganisms (74.5%) isolated from sow milk, followed by Streptococcus hyicus (53.9%), Staphylococcus epidermis (11.8%), Staphylococcus aureus (9.8%), and Staphylococcus haemolyticus (53.9%). In the Staphylococcus spp., Streptococcus pneumoniae (5.1%) was isolated as was Streptococcus sanguinis (3.8%) and Streptococcus ovis (2.9%). Results indicated that bacteria isolated from healthy sow milk were mostly susceptible to cephalothin (88.0%), amikacin (85.3%) and cefoxitin (82.4%), but were resistant to streptomycin (10.0%), kanamycin (33.1%) and tetracycline (19.6%).
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KEYWORD
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Swine mastitis, Milk, Antimicrobial susceptibility, Microorganism
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