Kiernan Milling, Veterinary Clinic, Granard, Co, Longford, Ireland.
Ir Vet J. 2008 Dec 1;61(12):818-26. doi: 10.1186/2046-0481-61-12-818.
Sow performance is a key component of the productivity of commercial pig farms. Reproductive failure in the sow is common in pig production. For every 100 sows served, 89 should farrow. In absence of specific diseases such as porcine parvovirus, pseudo-rabies, swine fever, leptospirosis and brucellosis, management failures are the most important causes of loss. A syndrome associated with reproductive inefficiency, and post-service vaginal discharge and high sow mortality in a commercial pig farm is described. Pregnancy failures exceeded 20% and sow mortality exceeded 12% for two consecutive years. The abnormal post-service vaginal discharge rate was 1.7% during the period of investigation.An investigation involving an analysis of farm records, a review of breeding management practices, clinical examinations, laboratory analysis and examination of urogenital organs was conducted.The main contributing factors found were a sub-optimal gilt breeding management, an inadequate culling policy in combination with a sub-optimal culling rate and the presence of cystitis in more than 1% of the urogenital organs examined. The high sow mortality rate was related to an aged breeding herd.A control programme was recommended based on management changes involving oestrus detection, movement of gilts post-service, hygiene in the service area, boar exposure post-service and urinary acidification. This programme failed to increase the farrowing rate due to incomplete implementation of the recommendations made. The farrowing rate increased to 86.5% subsequent to a farm manager change in January 2005, which resulted in complete implementation of the control programme.
母猪的生产性能是商业养猪场生产力的关键组成部分。母猪繁殖失败在养猪生产中很常见。每 100 头母猪应产仔 89 头。在没有特定疾病（如猪细小病毒、伪狂犬病、猪瘟、钩端螺旋体病和布鲁氏菌病）的情况下，管理不善是造成损失的最重要原因。描述了一种与繁殖效率低下、配种后阴道分泌物增多和母猪死亡率高有关的综合征。在连续两年中，妊娠失败率超过 20%，母猪死亡率超过 12%。在调查期间，异常配种后阴道分泌物率为 1.7%。
进行了一项涉及农场记录分析、繁殖管理实践审查、临床检查、实验室分析和泌尿生殖器官检查的调查。发现的主要因素是后备母猪繁殖管理不善、淘汰政策不充分与淘汰率低以及 1%以上检查的泌尿生殖器官存在膀胱炎有关。高母猪死亡率与老龄化繁殖群有关。
根据涉及发情检测、配种后后备母猪的移动、配种区的卫生、配种后公猪暴露和尿液酸化的管理变化，推荐了一个控制方案。由于没有完全实施所提出的建议，该方案未能提高产仔率。2005 年 1 月农场经理变更后，产仔率提高到 86.5%，这导致了控制方案的完全实施。
