Earticle

초록

영어

The occurrence of mastitis in diary cattle has been caused by genetic, physiological, managemental and environment factors accounted for the highest percentage of worldwide disease in dairy cattle. The purpose of this study was to analyze the occurrences and causative bacteria of subclinical mastitis in milking cows and also examine the distribution of bacteria in milk by isolating and identifying bacteria both in whole milk and quarter milk. 31.4% of the milking cows suffered subclinical mastitis, and 9.5% had it in terms of quarter milk. According to the results of analyzing bacteria in quarter milk of which somatic cell count (SCC) was over 500 thousand, 15 kinds of bacteria were isolated, and among them, Pantoea spp. formed the biggest part as 15.8%. From whole milk, 37 kinds of bacteria were identified, and among them, Klebsiella oxytoca showed the highest identification rate as 30.1%. According to the results of bacteria analyzed from the quarter milk of entire milking cows, 52 kinds of bacteria were identified. Among them, 17 kinds of Staphylococci were isolated, and CNS (Coagulase-Negative Staphylococci) formed a large part as 44.9%. The findings of this study showed that various kinds of bacteria were isolated from cows having subclinical mastitis; therefore, when managing specifications about milking or such, dairy farm will have to take proper action like performing sanitary control or counting somatic cells regularly in order to do their best for reducing mastitis.

목차

ABSTRACT
 Ⅰ. 서론
 Ⅱ. 재료 및 방법
  1. 공시축 및 공시재료
  2. 원유의 세균 검사
 Ⅲ. 결과
  1. 준임상형 유방염의 분방별 분포
  2. 집합유의 세균 분석
  3. 분방별 세균 분석
 Ⅳ. 고찰
 Ⅴ. 요약
 사사
 Ⅵ. REFERENCES

저자

• 최창용 [ Changyong Choe | 농촌진흥청 국립축산과학원 ] Corresponding author
• 허태영 [ Tai-Young Hur | 농촌진흥청 국립축산과학원 ]
• 정영훈 [ Young-Hoon Jung | 농촌진흥청 국립축산과학원 ]
• 조용일 [ Yong-Il Cho | 농촌진흥청 국립축산과학원 ]
• 류재규 [ Jae-Gyu Yoo | 농촌진흥청 국립축산과학원 ]
• 허윤희 [ Yoon-Hee Hur | 농촌진흥청 국립축산과학원 ]
• 박소정 [ So-Jeong Park | 농촌진흥청 국립축산과학원 ]
• 이재식 [ Jae-Sik Lee | 농촌진흥청 국립축산과학원 ]
• 강다원 [ Dawon Kang | 경상대학교 의학전문대학원 ]
• 권응기 [ Eung-Gi Kwon | 농촌진흥청 국립축산과학원 ]

참고문헌