Concern about the spread of infections in the hospital setting has prompted regulatory agencies to mandate infection control standards. Each hospital department is required to have written policies and procedures which describe measures to prevent and control the spread of nosocomial infections (hospital acquired infections), along with quality assurance programs to assure that procedures are followed. The Department of Nuclear Medicine, as other departments, should have procedures which address special precautions for the prevention of nosocomial infections. This article will focus on a new approach to prevent nosocomial infections, guidelines for handling patients and contaminated equipment, and the importance of quality assurance activities to monitor compliance to established standards. An opening discussion on the routes of transmission, and factors necessary for transmission of infection, will serve as a review to assist with understanding the concept for handling the hospitalized patient in a Nuclear Medicine setting.