Basurto-Kuba V M, Heath E, Wagner W A
Department of Veterinary Biosciences, University of Illinois, Urbana, IL 61801, USA.
Am J Vet Res. 1984 Jul;45(7):1328-32.
Testicular tissue and sperm from the cauda epididymidis of 300 boars were obtained in 6 collections during 1 year at a Chicago abattoir. Seventy-five boars (25%) had - 1 sperm abnormality present at rates that could result in infertility. These abnormalities and their frequency criteria were: proximal droplets > or = 15%, loose heads > or = 10%, abnormal middle pieces > or = 10%, abnormal acrosomes > or = 10%, bent tails > or = 15%, coiled tails > or = 15%, and abnormal head shapes > 5%. These 75 abnormal boars were then compared with a control group of 75 boars selected at random from the remaining 225 boars. Frequency of sperm abnormalities, testicular and epididymal weights, relative seminiferous epithelial areas (SEA), and the degree of testicular lesions were used in making comparisons. Testicular lesions were scored on a scale of 1 (normal) to 5. The SEA was measured and was expressed as the mean area of 50 tubules. The SEA was negatively correlated with proximal droplets and abnormal middle pieces in abnormal boars and abnormal head shapes in control boars. The mean SEA was 8.71 and 5.60 cm2 for control and abnormal boars, respectively. The overall mean score for testicular lesions was 1.72 and 3.17 for control and abnormal boars, respectively.
在一年中的6次采集过程中，从芝加哥一家屠宰场的300头公猪的睾丸组织和附睾尾部精子中获取样本。75头公猪（25%）存在精子异常，其发生率可能导致不育。这些异常及其频率标准为：近端液滴≥15%、头部松散≥10%、中段异常≥10%、顶体异常≥10%、尾部弯曲≥15%、尾部卷曲≥15%以及头部形状异常>5%。然后将这75头异常公猪与从其余225头公猪中随机选取的75头公猪组成的对照组进行比较。比较时采用了精子异常频率、睾丸和附睾重量、相对生精上皮面积（SEA）以及睾丸病变程度等指标。睾丸病变按1（正常）至5的等级评分。测量SEA并表示为50个曲细精管的平均面积。在异常公猪中，SEA与近端液滴和中段异常呈负相关，在对照公猪中与头部形状异常呈负相关。对照公猪和异常公猪的平均SEA分别为8.71平方厘米和5.60平方厘米。对照公猪和异常公猪的睾丸病变总体平均评分分别为1.72和3.17。
