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No.30 (1983/11) >

 
Title :ウシの潜在性乳房炎に関する研究 : II. 潜在性乳房炎乳汁の細菌検査成績(畜産学科)
Title alternative :A study of latent mastitis of cattle : II. Results of bacreriological examination of latent mastitis milk (Department of Animal Science)
Authors :日越, 博信
八幡, 辰正
Authors alternative :Higoshi, Hironobu
Hachiman, Tatsumasa
Issue Date :19-Nov-1983
Abstract :沖縄県における乳牛の潜在性乳房炎に関する調査の一環として, 本島北部地区のAおよびB地域で本乳房炎と判定された93頭の162分房について, 好気性細菌の検査を行ない, 次のような成績を得た。培養に供した162試料のうち159試料(98.1%)で細菌が検出され, これらの試料から合計1,003株の細菌が分離された。分離された菌株ではSta.epidermidis(52.6%)が最も多く, 次いでStrep.(14.1%), Coryne.(10.0%), Sta.aureus(8.0%)の順であり, これら4種類の細菌で全菌株の84.7%を占めた。また, 地域別にみたこれら4種類の細菌の出現順位は, A地域では上記と全く同じであったが, B地域ではCoryne.がほとんど分離されず, Sta.aureusが3位であった。Sta.aureusはCMTによる凝集程度の強い試料ほど分離される頻度が高く, Sta.epidermidisは逆に凝集程度の弱い試料ほど高かった。また, Strep.は凝集程度++++の試料で, Coryne.は+++の試料で, それぞれ分離頻度が最も高かった。
Aerobic bacteria were tested in the milk samples obtained from 162 quarters of 93 cows as a part of the survey for latent mastitis of milk cows in Okinawa Prefecture. A diagnosis of latent mastitis was made in cows in A and B areas of the northern part of this Prefecture. Studies were conducted on quarters milk with a degree of agglutination of +∿++++ by California mastitis test and the following results were obtained : Among the 162 samples cultured, bacteria were detected in 159,or 98.1% and a total of 1,003 strains were isolated. Staphylococcus (Sta.) epidermidis was found most frequently, 52.6%; followed by Streptococcus (Strep.), 14.1%; Corynebacterium (Coryne.), 10.0%; and Sta. aureus, 8.0%. These 4 kinds of bacteria constituted 84.7% of the total bacterial strains tested. As to each area, the order of frequency of appearance of these 4 kinds of bacteria was indentical with the A area described above (862 strains), while scarcely and Coryne. was isolated in B area (141 strains) where Sta. aureus occupied the third position. The frequency of isolation of Sta. aureus was higher as the degree of agglutination by CMT was more pronounced. Frequency of isolation of Sta. epidermidis, on the other hand, was higher as the degree of agglutination declined. The frequency of isolation of Strep. was the highest in samples with degree of agglutination of ++++, and that of Coryne. was the highest in those with degree of agglutination of +++.
Type Local :紀要論文
ISSN :0370-4246
Publisher :琉球大学農学部
URI :http://hdl.handle.net/20.500.12000/4010
Citation :琉球大学農学部学術報告 = The Science Bulletin of the Faculty of Agriculture. University of the Ryukyus no.30 p.533 -539
Appears in Collections:No.30 (1983/11)

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