What is the basis for the pain/distress classification system used by most institutions?

The basis for the pain/distress classification system used by most institutions is primarily derived from the USDA pain/distress categories. These categories serve as a standardized framework for classifying the level of pain and distress that animals may experience in research settings. The USDA guidelines are important as they help institutions comply with federal regulations and ensure that the welfare of animals is taken into account.

By utilizing these categories, institutions can evaluate the potential impact of research procedures on animal subjects, allowing for more informed decisions regarding animal care and use. This classification system also aids in determining the appropriate measures needed to alleviate or minimize pain and distress, thus supporting ethical research practices consistent with humane treatment.

While other methods and policies, such as institutional guidelines, international pain scales, or veterinary assessment methods, may also play a role in assessing animal welfare, the USDA categories are widely recognized as the fundamental basis for these classifications in the context of IACUC regulations and oversight.