Influence of clinical mastitis during early lactation on reproductive performance of Jersey cows
Influence of clinical mastitis during early lactation on reproductive performance of Jersey cows
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DOI：
10.3168/jds.s0022-0302(98)75690-5
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发表时间：
1998-05-01
影响因子：
3.5
通讯作者：
Oliver, SP
中科院分区：
文献类型：
--
作者：
Barker, AR;Schrick, FN;Oliver, SP
本研究的目的是确定临床型乳房炎对高产泽西奶牛繁殖性能的影响。奶牛（n = 102）与临床乳房炎在第一个150天的哺乳期进行了评估。根据泌乳次数和泌乳天数对各组进行平衡，并细分如下：第1组，首次人工授精（AI）前的临床乳腺炎（n = 48）;第2组，首次AI和妊娠之间的临床乳腺炎（n = 14）;第3组，确认妊娠后的临床乳腺炎（n = 40）;第4组，无临床乳腺炎的对照奶牛（n = 103）。由于产奶量或由革兰氏阳性或革兰氏阴性病原体引起的乳腺炎，未检测到生殖性能的差异。首次AT前患有临床型乳房炎的奶牛的首次AT天数（93.6天）显著大于所有其他组（71.0天）。首次人工授精后患临床型乳房炎的奶牛（2.9）每次受孕的人工授精次数显著高于首次人工授精前患临床型乳房炎的奶牛（1.6）、无临床型乳房炎的奶牛或确认妊娠后患临床型乳房炎的奶牛（1.7）。第一次人工授精后患临床型乳房炎的奶牛受孕天数（136.6 d）显著高于对照奶牛和确认妊娠后患临床型乳房炎的奶牛（92.1 d）。泌乳早期临床型乳房炎显著影响泽西奶牛的繁殖性能。
The purpose of this study was to determine the influence of clinical mastitis on reproductive performance of high producing Jersey cows. Cows (n = 102) with clinical mastitis during the first 150 d of lactation were evaluated. Groups were balanced according to lactation number and days of lactation and subdivided as follows: group 1, clinical mastitis before first artificial insemination (AI) (n = 48); group 2, clinical mastitis between first Al and pregnancy (n 14); group 3, clinical mastitis after confirmed pregnancy (n = 40); and group 4, control cows (n = 103) with no clinical mastitis. No differences in reproductive performance were detected because of milk production or mastitis caused by Gram-positive or Gram-negative pathogens. The number of days to first AT was significantly greater for cows with clinical mastitis before first AT: (93.6 d) than for all other groups (71.0 d). Artificial inseminations per conception were significantly greater for cows with clinical mastitis after first Al (2.9) than for cows with clinical mastitis before first Al (1.6), cows with no clinical mastitis, or cows with clinical mastitis after confirmed pregnancy (1.7). The number of days to conception for cows with clinical mastitis after first Al (136.6 d) was significantly greater than that for control cows and that for cows that developed clinical mastitis after confirmed pregnancy (92.1 d). Clinical mastitis during early lactation markedly influenced reproductive performance of Jersey cows.