Mastitis in heifers has been the topic of numerous studies in the past few decades. Many studies have concluded that a large percentage of heifers began their first lactation with intramammary infections (IMI), usually with coagulase-negative Staphylococcus (CNS) species. These bacteria are ubiquitous on the skin and hair of heifers and then colonize the teat canal and gland. Several studies have examined the outcome of prepartum intramammary antibiotic therapy in heifers and have shown antibiotics are successful at reducing infections. However, results have varied on the benefit of reducing these infections. Oliver et al.2 found prepartum intramammary antibiotic therapy in heifers increased milk production (+1000 Ibs) and decreased SCC linear score(-0.6) significantly over untreated animals. Treatment was demonstrated to be profitable, as long as the increase in milk production is greater than 84 pounds. In the seven state study, prepartum antibiotics were effective in curing IMI in heifers, butthe differences in SCC and milk production between treatment and control groups were small. The goal of this study was to treat prepartum heifers with intramammary antibiotics and monitor SCC, cultures, and milk production during the first part of theirlactation to determine the efficacy and value of therapy.
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机译：乳房炎在后几十年来一直是众多研究的主题。许多研究得出结论，大百分比的小母牛首次与患有型内型感染（IMI）的哺乳，通常用凝固酶阴性葡萄球菌（CNS）物种。这些细菌在小母牛的皮肤和头发上普遍存在，然后定植乳头运河和腺体。几项研究已经研究了继承母牛中预备胎儿患者抗生素治疗的结果，并显示出抗生素在减少感染方面是成功的。然而，结果对减少这些感染的益处而变化。 Oliver et al.2发现预备胎儿的孕产胎儿抗生素治疗增加了牛奶产量（+1000 IBS）并减少了在未处理的动物上显着降低了SCC线性得分（-0.6）。随着牛奶产量的增加大于84磅，待遇是有利可图的。在七种国家研究中，预备抗生素在海外母牛中均有有效的硫化物，但治疗和对照组之间的SCC和牛奶生产的差异很小。本研究的目标是在第一部分术后治疗患有内衣抗生素和监测SCC，培养物和牛奶生产的预备患者，以确定治疗的疗效和价值。
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