Everett R W
J Dairy Sci. 1982 Sep;65(9):1781-94. doi: 10.3168/jds.S0022-0302(82)82417-X.
Dursban 44, an insecticide for lice control, was applied to 185 Holstein bulls 9 to 52 mo of age. These sires were in various stages of progeny testing at an artificial insemination center. Application of this product killed 7 bulls, and the remaining bulls exhibited varying severity of illness with 6 classified as very sick. This study evaluated the effect of this illness on semen production. Semen output on 40,950 ejaculates from 583 Holstein bulls collected from July 1, 1975, through March 31, 1981, was analyzed to establish normal semen production and to estimate the effect of illness caused by Dursban 44 treatment. Ejaculate number, days between collections by previous number of ejaculates, calendar months, years, and ages of bulls affected the semen output characteristics, original volume, sperm concentration, percent motile sperm, total sperm per ejaculate, percent prefreeze discards, percent postthaw sperm motility, and percent postthaw discards. Ejaculate volume, motility, total percent prefreeze discards, and percent postthaw discards were influenced negatively on the 6 very sick bulls. Percent postthaw discards were higher on all bulls treated with Dursban 44 for up to 6 mo post-treatment.
敌敌涕44（一种用于防治虱子的杀虫剂）被应用于185头9至52月龄的荷斯坦公牛。这些种公牛处于人工授精中心不同阶段的后裔测定中。使用该产品导致7头公牛死亡，其余公牛呈现出不同程度的疾病，其中6头被归类为病重。本研究评估了这种疾病对精液生产的影响。分析了1975年7月1日至1981年3月31日期间从583头荷斯坦公牛采集的40950份射精样本的精液产量，以确定正常精液生产情况，并估计敌敌涕44处理导致的疾病影响。射精次数、按先前射精次数计算的采集间隔天数、日历月份、年份以及公牛年龄影响精液产量特征、原始体积、精子浓度、活动精子百分比、每次射精的总精子数、冻融前废弃率、冻融后精子活动率以及冻融后废弃率。射精体积、活动率、冻融前总废弃率以及冻融后废弃率在6头病重公牛中受到负面影响。在处理后长达6个月内，所有接受敌敌涕44处理的公牛的冻融后废弃率都更高。
