Which of the following is NOT a responsibility of the principal investigator?

The principal investigator (PI) is primarily responsible for the overall conduct of research involving animals, including the welfare and ethical treatment of those animals. While the PI must ensure that all personnel are trained in their respective roles related to animal care and that hazards involving animals are recognized and mitigated, providing direct medical care to the animals is generally not one of their responsibilities. Medical care is typically the domain of veterinary staff or animal care personnel who have the proper training and qualifications to handle such tasks.

In this context, ensuring that staff understand health services, recognizing hazards involved with animals, and overseeing the usage of personal protective equipment are all critical components of the PI's role. These responsibilities help ensure a safe and compliant research environment, prioritizing both animal welfare and the safety of research personnel.