题目内容
Housing of animals is best conducted behind __________ barriers. The term "barrier" rather describes a program aiming at the prevention of pathogen introduction than just a certain design of a facility.
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A greater risk arises from animals which have been bred or housed in experimental units where less attention may be paid to ____________ hygienic measures compared with breeding units.
On Aug 24 1966, the Laboratory Animal Welfare Act (P.L. 89-544) was signed into law. The Act sets minimum standards of care and housing for dogs, cats, primates, rabbits, hamsters and _________________ in the premises of animal dealers and laboratories, and it requires identification of dogs and cats to prevent theft.
The 3R principles in animal research refer to ______________, ______________, and _______________.
The use of dogs and cats in research in the U.S. decreased from 1973 to 2016 from 195,157 to 60,979, and from 66,165 to 18,898, respectively.
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