Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8501942 | Livestock Science | 2018 | 5 Pages |
Abstract
We determined the associations between serum haptoglobin concentration and peri- and postpartum disorders, milk yield, and reproductive performance in dairy cows. Furthermore, associations between haptoglobin and some blood metabolites were also investigated. We collected blood from 112 Holstein cows 1 week postpartum to measure serum haptoglobin and metabolite/enzyme (aspartate aminotransferase [AST], total bilirubin [T-bilirubin], total cholesterol [TCH], non-esterified fatty acids [NEFA], and β-hydroxybutyrate [BHBA]) concentrations. Cows were divided into two groups based on their haptoglobin concentrations: a low-HP group (<100â¯Âµg/mL, nâ¯=â¯72) and a high-HP group (>100â¯Âµg/mL, nâ¯=â¯40). The incidence of peri- and postpartum disorders (dystocia, retained placenta, metritis, and endometritis) was higher (Pâ¯<â¯0.05-0.01) in the high-HP group than in the low-HP group, whereas milk yield during the first 2 months postpartum was lower (Pâ¯<â¯0.05-0.01) in the high-HP group than in the low-HP group. Moreover, the probability of conception by 210 days postpartum was also lower (hazard ratio: 0.55; Pâ¯<â¯0.05) in the high-HP group than in the low-HP group. Serum AST, T-bilirubin, NEFA, and BHBA concentrations were higher in the high-HP group than in the low-HP group (Pâ¯<â¯0.05-0.01), whereas TCH concentration was lower (Pâ¯<â¯0.01) in the high-HP group than in the low-HP group. In conclusion, our results indicate that high serum haptoglobin concentration 1 week postpartum was associated with a greater incidence of peri- and postpartum disorders, and reductions in milk yield and reproductive performance, in dairy cows. It was also associated with high serum AST, T-bilirubin, NEFA, and BHBA concentrations, but low TCH concentration.
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Authors
D.H. Shin, J.K. Jeong, I.S. Choi, S.H. Moon, S.C. Lee, H.G. Kang, S.B. Park, I.H. Kim,