書誌事項
- タイトル別名
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- Aspects of Subclinical Mastitis in a Dairy Herd Observed by the Quarter Difference Value of Electrical Conductivity
- デンキ デンドウドブン ボウカンサチ ニ ヨッテ カンサツシタ イチギュウグン
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抄録
To probe the subclinical mastitis in a herd of cows in our institute, the conductivity of foremilk samples were measured fortnightly throughout a few lactational periods for 2.5 years. The difference in the conductivity at 25°C between samples obtained from different quarters of an udder was used as a parameter (quarter difference, Qd). Using 53 cows at 91 lactational periods, 362 quarters were examined and the following results were observed. 1) The percentages of quarters defined as normal, slightly abnormal or abnormal were 75, 10 and 15%, respectively. 2) The ratio of the normal quarter de-creased as the number of lactation progressed. 3) The mean Qd of the front quarters were significantly greater than those of the rear quarters. 4) The Qd values either fluctuated frequently or increased steadily in abnormal quarters. 5) In only less than one third of the quarters, the mean Qd of each quarter increased from one lactation to the next one. 6) The high Qd values were frequently observed in quarters which received a mastitis treatment previously.
収録刊行物
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- 日本獸醫學雜誌(The Japanese Journal of Veterinary Science)
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日本獸醫學雜誌(The Japanese Journal of Veterinary Science) 44 (6), 1007-1019, 1982
公益社団法人 日本獣医学会
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詳細情報 詳細情報について
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- CRID
- 1390282681398951168
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- NII論文ID
- 110003917054
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- NII書誌ID
- AN00191788
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- COI
- 1:STN:280:DyaL3s3hs12rtw%3D%3D
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- ISSN
- 18811442
- 00215295
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- NDL書誌ID
- 2573340
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- PubMed
- 7182626
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
- Crossref
- PubMed
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可