We usually receive confirmed cases of illness from Lanarkshire Health Board.

A diagnosis is made from a stool sample provided to a GP by the person affected.

Each time we receive a confirmed diagnosis, the individual is contacted as soon as possible and asked to complete a questionnaire to help identify the source of the infection.

If a likely source is identified, we carry out a follow-up investigation and take any appropriate action.

We send the completed questionnaire, without delay, to Lanarkshire Health Board who use the information to identify any wider problems in the community. It's also used as part of the general surveillance of food or water-related infections within North Lanarkshire.