The Comparative Biology Unit (CBU) is a 25,000-square-foot animal research facility that is fully accredited by the American Association for Accreditation of Laboratory Animal Care. The CBU has an all-inclusive clean-dirty corridor system, with anteroom extensions in some rooms. The unit offers a wide range of services, including: comprehensive animal care, transgenic rodent breeding services, veterinary surveillance, diet preparation and individualized animal dietary services, animal monitoring, surgery and necropsy. The CBU adheres to strict environmental control guidelines and complies with the Animal Welfare Act provisions; and animal welfare guidelines such as the NIH Guide of the Care and Use of Laboratory Animals standa