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Detection of Coxiella burnetii in Cattle

소에서 Coxiella burnetii의 검출

  • Kim, Yo-Han (Laboratory of Veterinary Internal Medicine, College of Veterinary Medicine, Kangwon National University) ;
  • Kim, Doo (Laboratory of Veterinary Internal Medicine, College of Veterinary Medicine, Kangwon National University)
  • 김요한 (강원대학교 수의과대학 수의내과학교실) ;
  • 김두 (강원대학교 수의과대학 수의내과학교실)
  • Accepted : 2015.10.23
  • Published : 2015.12.31

Abstract

Coxiella burnetii is an obligate intracellular rickettsial organism and the causative agent of Query fever, a zoonosis that occurs worldwide. In Korea, C. burnetii infection had occurred in humans and animals. However, the studies were only conducted in geographically limited area for detection of C. burnetii. The objective of this study was to detect C. burnetii in Korean native cattle and dairy cattle nationwide by real-time PCR. The total of 807 blood samples from 622 Korean native cattle and 185 dairy cows, 170 individual milk samples of dairy cows, and 348 bulk tank milk samples of dairy herds were collected nationwide. From blood samples, C. burnetii was detected in 17 (2.7%) out of 622 Korean native cattle and 2 (1.1%) of 185 dairy cows. From milk samples, C. burnetii was detected in 27 (15.9%) out of 170 individual milk samples of dairy cows. And C. burnetii was detected in 84 (24.1%) of 348 bulk tank milk samples. In conclusion, this study revealed that the detection rates are considerably high in cattle and the infection of C. burnetii has been continuously occurring in cattle of Korea. In order to prevent the hazards of a zoonosis Q-fever that occur both humans and domestic animals, further studies are needed to clarify the epidemiology of Q-fever of domestic animals and humans in Korea.

Coxiella burnetii는 세포 내 기생하는 리케치아의 한 종류로 전세계에서 발병하는 인수공통 전염병인 큐열의 원인체이다. 국내에서 C. burnetii의 감염이 사람과 동물에서 보고되고 있지만 제한적인 지역에서만 실시되었다. 본 연구의 목적은 real-time PCR을 이용하여 소의 혈액과 유즙 시료에서 C. burnetii의 전국적인 검출률을 조사하는 것이다. 총 1,325 개 시료(한우 혈액 622 개, 젖소 혈액 185 개, 젖소 개체 유즙 170 개 및 젖소 집합유 348 개)를 전국적으로 채취하였다. 채취한 시료에서 Genomic DNA를 추출하였으며 C. burnetii 검출을 위한 real-time PCR을 실시하였다. 한우 혈액 622 개 중 17(2.7%) 개에서 C. burnetii가 검출되었고 젖소 혈액 185 개 중 2 (1.1%) 개에서 C. burnetii가 검출되었다. 젖소의 개체별 유즙 170 개 중 27(15.9%) 개에서 C. burnetii가 검출되었으며 집합유 348 개 중 84(24.1%) 개에서 C. burnetii가 검출되었다. 본 연구는 국내의 소가 C. burnetii에 높게 감염되어 있는 것을 확인하였으며, 인수공통질병인 큐열에 의한 가축과 사람의 피해를 예방하기 위하여, 가축과 사람의 큐열에 대한 추가적인 역학적 연구가 필요하다고 생각된다.

Keywords

References

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