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KMID : 0359320110510030233
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Korean Journal of Veterinary Research
2011 Volume.51 No. 3 p.233 ~ p.237
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The impact of the duration of retained placenta on postpartum diseases and culling rates in dairy cows
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Hur Tai-Young
Jung Young-Hun
Kang Seog-Jin
Choe Chang-Yong
Kim Ui-Hyung
Ryu Il-Sun
Son Dong-Soo
Park Sung-Jai
Kim Ill-Hwa
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Abstract
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The objective of this study was to evaluate the duration of retained placenta (RP) on postpartum diseases and culling in dairy cows. Data were collected from 456 Holstein cows between 2008 and 2010. RP (≥ 24 h after parturition) and postpartum diseases were diagnosed by farm managers and a veterinarian according to standardized definitions. The overall incidence rate of RP was 14.0%, and the incidence rate of RP with fourth and higher parity was two times that of cows having offspring for the first time. The duration of RP was 2 to 15 days with a mean of 6.8 days, except for cases of fourth and higher parity which had a mean of 10.5 days. A total of 63% of cows with RP had postpartum diseases. Among the cows diagnosed with RP, 23.4% developed metritis, and of those, 35.3% developed endometritis or pyometra. A total of 25% (n = 16) cows with RP were culled within 60 days in milk (DIM) and of those culled, 75% (n = 12) had postpartum diseases. These results suggest that RP increases the risk of postpartum diseases such as metritis and mastitis and is a culling hazard up to 60 DIM. Keywords : culling rates, dairy cows, postpartum diseases, retained placenta
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KEYWORD
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culling rates, dairy cows, postpartum diseases, retained placenta
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