Journal of Environmental Health Sciences (한국환경보건학회지)
- Volume 11 Issue 2
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- Pages.41-54
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- 1985
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- 1738-4087(pISSN)
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- 2233-8616(eISSN)
A Study on Mastitis Infection Rate and Investigation of Milk Contamination Level by Measuring the Bacteria and Somatic Cell Counts in Gyunggi Area
京畿一圓 乳牛의 乳房炎 感染率과 原乳의 細菌 및 體細胞數 測定에 따른 乳質 汚染度에 관한 연구
Abstract
This study was conducted for the improvement of milk quality and milk hygiene in public health point of view. Investigation of mastiris infection rate, isolation and identification of causative microorganisms in CMT positive milk, investigation of milk contamination level by measuring the bacteria and soma tic cell counts and investigation of dairy management in farms were performed on 1.605 quarters milk of 434 cows of 20 dairy farms in Gyunggi-area from September 1983 to March 1984. The results were summarized as follows 1. Sixteen (3.7%) of 434 cows were found to be infected with clinical mastiris. 234 (53.9%) of 434 cows and 608(37.9%) of 1, 605 quarters were found to be infected with subclinical mastiris. 2. The causative microorganisms isolated were Staphylococcus aureus (38.3%), Staphylococcus epidermidis(21.0%), Micrococci(13.6%), Streptococcus spp. (12.3%), E. coli (7.4%), Fungus & Yeast (1.6%) and others (5.8%). 3. Total numbers of bacteria were
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