Studies on Incidence and Causative Agents of Abnormal Milk among Dairy Cattle in Jeonbug Area

Kim, Jong Myeon; Kwak, Taik Hoon

Korean Journal of Veterinary Research 1975;15(2):315-320.

Jong Myeon Kim, Taik Hoon Kwak

Department of Veterinary Medicine, College of Agriculture, Jeonbug National University

전북지방(全北地方) 젖소의 이상유(異常乳) 발생상황(發生狀況)과 원인균(原因菌)에 관한 연구(硏究)

김종면, 곽택훈

전북대학교 농과대학 수의학과

Abstract

A total of 364 quarter milk samples of 91 dairy cattle from 4 area around Jeonju in Jeonbug area were examined for infection rate and causative abets of mastitis by the Laboratory Procedures used in the Connecticut Mastitis-Control Program. The results obtained were as follows: 1. One hundred and thirty quarters (35.7%) from 67 cows (73.6%) were found to be infected with mastitis. It was found that 5 (1.37%) of the infected quarters were clinical mastitis and all of the rest were subclinical mastitis (125 quarters). 2. The main causative agents were found to be Staphylococcus aureus (46 quarters), Streptococcus agalactiae (49 quarters), streptococcus disgalactiae (18 quarters), Steptococcus uberis (13 quarters). Corynebacteria, Coliform organisms, Pseudomonas were also occasionally found to be causative organisms. 3. Having examined the number of infection Quarter per head of mastitis dairy cattle samplings, major findings were that the average number of infection quarter to total dairy cattle examined was 1.4 quarters, and that average number of infection quarter to the infected cattle was 1.9 quarters.