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RAPD Analysis and Antimicrobial Susceptibility of Streptococcus equi subsp. zooepidemicus Isolated from Thoroughbred Horses

더러브렛 말에서 분리한 Streptococcus equi subsp. zooepidemicus의 RAPD 분석 및 약제 감수성

  • Received : 2010.02.04
  • Accepted : 2010.04.27
  • Published : 2010.05.31

Abstract

A total of 68 samples were collected including vaginal mucosa (n=66) from Jangsu stud farm, an equine aborted fetus (n=1), and uterine contents (n=1) from Jeju island. Seventeen Streptococcus equi subsp. zooepidemicus (S. zooepidemicus) strains isolated from horses in Korea were identified as S. zooepidemicus by biochemical tests and sodA.seeI specific multiplex PCR. All isolated strains were divided into 4 clusters: group 1 (No. 2, 3, 5, 6, 7, 11, 12, 13, 14, 15), group 2 (No. 4, 9), group 3 (No. 10, 16, 17), and group 4 (No. 1, 8) by RAPD typing. In group 3, No. 10 isolate that was isolated from vaginal mucosa was indistinguishable from No. 16 and 17 isolates, which were isolated from the equine uterine contents and the equine aborted fetus, respectively. The results of this study suggest that a limited epidemiological relationship exists between the strains from Jangsu (No. 10) and Jeju (No. 16 and No. 17). All isolates showed a high susceptibility to ampicillin, cefoxitin, ceftiofur, cephalothin, florofenicol, gentamicin, nalidixic acid, oxacillin, penicillin, tiamulin, tylosin and vancomycin in antimicrobial susceptibility tests. These results may provide the basic information needed to establish strategies for the treatment and prevention of reproductive diseases in mares in Korea.

Streptococcus equi subsp. zooepidemicus는 말의 생식기 질환을 유발하는 중요한 병원체 중 하나로서 국내 말의 생산성 향상을 도모할 목적으로 제주도에서 사육중인 더러브렛 암말의 유산태아 및 그 말의 자궁내용물과 장수목장에서 암말의 교배전 생식기 질환이 의심되는 말의 질 내용물로부터 시료를 채취하여 Streptococcus equi subsp. zooepidemicus을 분리하여 그 분리균의 특성 및 항균제 감수성 검사를 실시한 결과, RAPD typing에서는 크게 4개의 cluster로 구분되었다. 특히 제주도에서 분리한 균주와 장수목장에서 분리한 하나의 균주가 동일한 pattern을 나타내었다. 항균제 감수성 검사에서는 대부분의 균주가 ampicillin 등의 약제에 감수성이 있음을 확인하였다. 본 연구의 결과는 국내에서 사육중인 암말의 생식기 질병의 예방 및 치료에 유용할 것으로 생각된다.

Keywords

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