전북지방 젖소의 유방염 검색

Survey of the Incidence of Mastitis in Dairy Cattle in Chonbuk Province

A total of 444 quarters milk samples of 111 dairy cattle in Chonbuk area were examined for infection rate and causative agents of mastitis by “the laboratory procedures used in the Connecticut Mastitis Control Program (CMCP) and California Mastitis Test (CMT)”. The results obtained were as follows: 1. Of 444 samples, 39.2% had positive CMCP value and 24.4% positive CMT reaction. 2. One hundred and seventy four (39.2%) from 82 cattle (73.9%) were found to infected with mastitis. It was found that 8(1.8%) of the infected quarters were clinical mastitis and all of the rest were subclinical mastitis. 3. The main causative agents were found to Staphylococcus aureus (63 quarters), Streptococcus agalactiae (56 quarters), non-Str. agalactiae streptococci (54 querters), Escherichia coli (19 quaters), the actual total number of quarters detected as mastitis would be 174, as 18 of these quarters showed multiple infection with two different organisms. 4. Having examined the number of infection quarter per head of mastitis in dairy cattle sampling, major finding were that the average number of infection quarters to total dairy cattle exemined was 1.57 quarters, and that of the infected cattle was 2.1 quarters. Infected quarters in cattle with 1, 2, 3 and 4 were noted 27(32.9%), 28(34.1%), 17(20.7%), and 10(12.3%), respectively.