Oravainen J, Heinonen M, Seppä-Lassila L, Orro T, Tast A, Virolainen Jv, Peltoniemi Oat
Faculty of Veterinary Medicine, University of Helsinki, Saarentaus, Finland.
Reprod Domest Anim. 2006 Dec;41(6):549-54. doi: 10.1111/j.1439-0531.2006.00713.x.
The effect of vulvar discharge syndrome (VDS) on sow and gilt fertility was studied on 26 farms. Of 824 animals inspected in 21 randomly selected and five VDS problem farms, 19 (2.3%) were afflicted with VDS. Altogether 542/799 of the examined animals (67.8%) farrowed thereafter. Nine of the 19 VDS animals (47.4%) and 533/780 non-VDS animals (68.3%) farrowed at the first chance after the examination (p = 0.05). None of the unmated gilts in this study had VDS. Environmental and individual factors likely to be associated with fertility and VDS were tested. In multivariate analysis, factors associated with farrowing were VDS, reproductive status, availability of roughage and confinement to individual stalls. None of the variables tested was associated with VDS. However, all of the VDS problem farms were overcrowded and had concrete, partly slatted floors with little or no bedding. The median value of haptoglobin (Hp) was 2.5 (range 1.3-3.1) g/l in VDS animals and 2.3 (0.5-4.3) g/l in controls (p = 0.6). The median C-reactive protein (CRP) in VDS animals was 30.3 (3.3-171.3) mg/l and in controls 25.9 (3.3-361.1) mg/l (p = 0.7). In conclusion, VDS decreased fertility of gilts and sows in the absence of a systemic acute-phase response, as indicated by stable concentrations of Hp and CRP.
在26个农场研究了外阴排出物综合征（VDS）对母猪和后备母猪繁殖力的影响。在随机选择的21个农场和5个存在VDS问题的农场中检查的824头动物中，19头（2.3%）患有VDS。此后，共799头受检动物中的542头（67.8%）产仔。19头VDS动物中有9头（47.4%）和780头非VDS动物中的533头（68.3%）在检查后的第一次机会时产仔（p = 0.05）。本研究中未交配的后备母猪均未患VDS。对可能与繁殖力和VDS相关的环境和个体因素进行了检测。在多变量分析中，与产仔相关的因素有VDS、繁殖状态、粗饲料供应情况以及单栏饲养。所检测的变量均与VDS无关。然而，所有存在VDS问题的农场都过度拥挤，地面为混凝土材质，部分为板条地板，几乎没有或根本没有垫料。VDS动物中触珠蛋白（Hp）的中位数为2.5（范围1.3 - 3.1）g/l，对照组为2.3（0.5 - 4.3）g/l（p = 0.6）。VDS动物中C反应蛋白（CRP）的中位数为30.3（3.3 - 171.3）mg/l，对照组为25.9（3.3 - 361.1）mg/l（p = 0.7）。总之，如Hp和CRP浓度稳定所示，在没有全身性急性期反应的情况下，VDS会降低后备母猪和母猪的繁殖力。
