| Genetic properties of R plasmids in Salmonella isolates of swine and bovine origin in Korea I. Distribution and drug resistance of Salmonella isolated from dairy cow |
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Won-pil Choi1, Hi-suk Lee1, San-geon Yeo2, Hun-jun Lee3, Tae-chul Chae1 |
1College of Veterinary Medicine, Kyungpook National University
2Department of Veterinary Medicine, College of Agriculture, Gyeonsang National University
3Department of Veterinary Medicine, College of Agriculture, Chungnam National University |
| 우(牛), 돈(豚)에서 분리(分離)한 Salmonella유래(由來) R plasmid의 유전학적(遺傳學的) 및 분자생물학적(分子生物學的) 성상(性狀)에 관한 연구(硏究) I. 유우(乳牛)에서 Salmonella속균(屬菌)의 분포상황(分布狀況) 및 약제내성(藥劑耐性) |
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최원필1, 이희석1, 여상건2, 이헌준3, 채태철1 |
1경북대학교 수의과대학 수의학과
2경상대학교 농과대학 수의학과
3충남대학교 농과대학 수의학과 |
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| Abstract |
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This paper dealt with the distribution of Salmonella (S) infection on 4 herds in Kyungju and Taegu during the period from May to October 1986. Isolated Salmonella were examined for serotypes, antimicrobial drug resistance and detection of R plasmid. The results obtained were summarised as followings: 1. Of total 4.622 samples from 4 herds, 67 Salmonella were isolated from 51 samples(1.1%), and their serovar strains were S typhimurium 6, S derby 5, S infantis 4, S bareilly 4, S dublin 3, S anatum 2, S montevideo 2 and untypable 41. 2. The isolation rate of Salmonella was higher in summer and autumn. 3. Of the 67 strains examined, 45 (67.2%) were resistant to one or more antibiotics, such as ampicillin (Am), cephalothin (Ce), chloramphenicol (Cm), rifampicin (Rf), sulfadimethoxine (Su), and tetracycline (Tc), and higher resistant to Sm (40.2%), Ce (31.3%), Am (23.9%). 4. Of the 45 resistant Salmonella strains, 44 (97.8%) harbored conjugative R plasmids and the transfer frequency of Sm (100%), Ce (95.2%), Tc (91.0%) and Su (80.0%) resistance was much higher than that of the other drug resistance. 5. The most common resistant patterns were Sm, Ce, AmCeCmSmSuTc, and AmCe. 6. In 4 herds, the incidience of drug resistance was 57.7%~100% and transfer frequency of conjugative R plasmid was 96.1%~100%. |
| Key Words:
cattle, Salmonella, serotype, drug resistance, R plasmid |
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