This aim of this document is to provide guidance on the public health and clinical management of cases of IID. Its aim is to guide the practice of Consultants in Public Health Medicine and General Practitioners as well as Consultants in Clinical Microbiology, Infectious Diseases, Emergency Medicine, Paediatrics, General Medicine and Occupational Medicine. It is intended as an informative and useful resource for Environmental Health Officers, Infection Control Nurses, Non‐consultant Hospital Doctors and other Specialist Medical staff whose work does not normally involve management of these pathogens and diseases described here. The advice in this document is the most current in relation to exclusion and other guidance issues regarding Infectious Intestinal Disease (IID) and supersedes advice in other Irish national guidance.