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英文文献：Sub-therapeutic Antibiotics and Productivity in U.S. Hog Production-亚治疗性抗生素和美国生猪产量
英文文献作者：McBride, William D.,Key, Nigel D.,Mathews, Kenneth H., Jr.
英文文献摘要：
Antimicrobial drugs are fed to hogs at sub-therapeutic levels to prevent disease and promote growth. However, there is concern that the presence of antimicrobial drugs in hog feed is a factor promoting the development of antimicrobial drug-resistant bacteria. This study uses a sample-selection model to examine the impact that use has on the productivity of U.S. hog operations. The analysis did not find a relationship between productivity and sub-therapeutic antibiotics fed during finishing, but productivity was significantly improved when fed to nursery pigs. Restrictions on feeding antimicrobial drugs during the nursery phase would likely impose significant economic costs on U.S. hog producers.
以亚治疗水平向猪饲喂抗菌药物，以预防疾病和促进生长。然而，人们担心，猪饲料中抗菌药物的存在是促进耐药菌发展的一个因素。本研究使用样本选择模型来检验使用对美国生猪生产效率的影响。分析没有发现生产能力与饲养期间使用的亚治疗性抗生素之间的关系，但生产能力在喂养仔猪时显著提高。在苗圃阶段限制饲养抗菌药物可能会给美国养猪户带来巨大的经济损失。
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