韓国の乳牛の繁殖成績における卵巣嚢腫の発症関連因子と経済的影響

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概要

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• The objectives of this study were to determine the risk factors for development of postpartum ovarian cysts by evaluating several reproductive factors in individual cows, and to determine the economic impact of ovarian cysts on subsequent reproductive performance in dairy herds in Korea. The data, including cow parity, abnormal puerperium, endometritis, body condition score (BCS), and breeding status were collected from 634 cows in nine dairy herds. We used logistic regression to evaluate the effects of these factors on ovarian cysts. A stepwise procedure, used to obtain the appropriate model with α=0.05, revealed that cow parity was the most important risk factor for ovarian cyst development within 8 weeks postpartum, while development of endometritis and BCS loss ≥1 from the dry period to 8 weeks postpartum were the most important risk factors for ovarian cyst development beyond 8 weeks postpartum. The occurrence of ovarian cysts beyond 8 weeks postpartum prolonged (P<0.01) the mean intervals from calving to first service (27 days) and conception (77 days), and increased (P<0.05) the culling rate (7.8%), while ovarian cyst development within 8 weeks postpartum did not affect (P>0.05) the mean intervals from calving to first service and conception or the culling rate. The economic loss resulting from the occurrence of ovarian cysts was estimated at approximately 823,996 won ($687) due to effects on the cost of nutrition, average growth of calves, labor and medical costs, and culling. These results suggest that cow parity is correlated with the development of ovarian cysts within 8 weeks postpartum, and endometritis and BCS loss ≥1 from the dry period to 8 weeks postpartum are correlated with the development of ovarian cysts after 8 weeks postpartum, which decreases reproductive performance and results in economic loss in dairy herds in Korea.

• 日本繁殖生物学会の論文

著者

• Kim Ill-Hwa

  College of Veterinary Medicine, Chungbuk National University

• Kim Ill-hwa

  College Of Veterinary Medicine Chungbuk National University

• Kang Hyun-gu

  College Of Veterinary Medicine Chungbuk National University

• Kang Hyun-gu

  College Of Veterinary Medicine Chonnam National University

• KIM Ki-Doek

  College of Veterinary Medicine, Chungbuk National University

• KI Kwang-Sook

  National Livestock Research Institute, RDA

• Kim Ki-doek

  College Of Veterinary Medicine Chungbuk National University

• Ki Kwang-sook

  National Livestock Research Institute Rda

関連論文

• 分娩後子宮内膜炎発症牛の分娩前後における免疫反応
• 韓国在来種の性成熟期における年齢と体重, ならびに分娩後無発情期の血漿プロゲステロン値の変動(臨床繁殖学)
• 韓国における乳牛の分娩後子宮内膜炎のリスクファクターと子宮内膜炎がその後の繁殖成績に及ぼす影響
• Risk Factors and the Economic Impact of Ovarian Cysts on Reproductive Performance of Dairy Cows in Korea
• 韓国の乳牛の繁殖成績における卵巣嚢腫の発症関連因子と経済的影響
• Immune Responses during the Peripartum Period in Dairy Cows with Postpartum Endometritis

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