Hosie B D, Low J C, Bradley H K, Robb J
St Boswells Veterinary Investigation Centre, Greycrook, Roxburghshire.
Vet Rec. 1991 Mar 2;128(9):204-8. doi: 10.1136/vr.128.9.204.
Serum calcium, magnesium and phosphate values of ewes recently affected by vaginal prolapse were compared with unaffected ewes in four flocks. Subclinical hypocalcaemia was demonstrated in some affected and unaffected ewes in three flocks. Magnesium and phosphate values were normal. In two flocks the body condition of ewes recently affected by vaginal prolapse was variable and reflected the variation in condition found in the flock. In a third flock affected ewes had significantly lower body condition scores than unaffected ewes (P less than 0.001). Analysis of the fourth flock was not possible. Oestrogenic mycotoxins were not detected in any of the feed samples taken from these flocks. The following year the management, nutrition and energy, and the protein and calcium status of ewes in 12 flocks of greyface/mule ewes with a history of a regular high (greater than 3 per cent) or low (less than 1 per cent) prevalence of vaginal prolapse were compared. A high prevalence was not associated with any particular feedstuff. A high or intermediate (1 to 3 per cent) prevalence of vaginal prolapse was found in three of the four flocks managed as a single group and these three flocks were fed on an unrestricted basis. Body condition scoring and beta-hydroxybutyrate estimation confirmed that ewes in these flocks were overfed. The prevalence of vaginal prolapse in the flocks was not related to the serum albumin, calcium or urea of the ewes. Therefore subclinical hypocalcaemia was probably a consequence of vaginal prolapse rather than a cause.
将近期发生阴道脱垂的母羊的血清钙、镁和磷酸盐值与四个羊群中未受影响的母羊进行了比较。在三个羊群中，一些受影响和未受影响的母羊都出现了亚临床低钙血症。镁和磷酸盐值正常。在两个羊群中，近期发生阴道脱垂的母羊的体况各不相同，反映了该羊群中体况的差异。在第三个羊群中，受影响的母羊的体况评分明显低于未受影响的母羊（P小于0.001）。无法对第四个羊群进行分析。在从这些羊群采集的任何饲料样本中均未检测到雌激素性霉菌毒素。次年，对12个有阴道脱垂高（大于3%）或低（小于1%）发生率记录的灰脸/骡子母羊的羊群进行了管理、营养和能量以及蛋白质和钙状况的比较。高发生率与任何特定饲料无关。在作为一个单一群体管理的四个羊群中的三个羊群中发现了高或中等（1%至3%）的阴道脱垂发生率，并且这三个羊群是自由采食的。体况评分和β-羟基丁酸估计证实这些羊群中的母羊喂食过量。羊群中阴道脱垂的发生率与母羊的血清白蛋白、钙或尿素无关。因此，亚临床低钙血症可能是阴道脱垂的结果而非原因。
