Studies on Epidemiological Investigations of Bovine Mastitis in Jeonnam District 2. Comparisons of Mastitis Screening Tests

전남지역(全南地域) 유우유방염(乳牛乳房炎)의 역학적(疫學的) 조사연구(調査硏究) 2. 유방염(乳房炎)의 간접검사법(間接檢査法) 응용성적(應用成績)의 비교검토(比較檢討)

  • Na, Jin Soo (Department of Veterinary Medicine, College of Agriculture Jeonnam National University)
  • 나진수 (전남대학교 농과대학 수의학과)
  • Published : 1975.04.30


In order to compare the diagnostic value of Modified California Mastitis Test (MCMT), Modified Whiteside Test (MWT) and Resazurin Reduction Test (RRT) using the direct microscopic leucocyte count (DMLC) as standard, a total of 739 quarter milk samples were examined. The results obtained were as follows: 1. Of the 739 samples, 24.4% had positive DMLC value (over 500,000 leucocytes per mI.), 32.6% positive MCMT reaction, 34.9% positive RRT reaction and 39.9% positive MWT reaction. 2. The identical ratings of the three mastitis screening tests with DMLC values were 60.7% (MWT), 61. 8% (MCMT) and 72.1% (RRT). 3. The mean reaction values of the predicted mastitis screening tests were $1.09{\pm}0.01$ (MWT), $1.12{\pm}0.06$ (MCMT) and $1.25{\pm}0.40$ (RRT). The efficiency ratings of them were 34.8% (MWT), 49.3% (RRT) and 55.0% (MCMT) respectively.