题目内容
_______________ animals are generally housed without special precautions to prevent entry of infectious agents. The risk to get infected is higher than for barrier-housed animals, but they are not necessarily infected with many pathogens.
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It is frequently considered less important to monitor for the presence of ___________ agents in conventional animals than in their rederived, barrier-maintained counterparts.
Animal euthanasia is the act of putting an animal to death or allowing it to die by withholding extreme _____________ measures.
TheUSAnimalWelfareActwaspassinAug 24_______.
The US Guide for the Care and Use of Laboratory Animals (8th Edition) was published in _______.
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