An investigation is under way into an outbreak of gastroenteritis among players from four county camogie teams after a series of matches at a Co Limerick GAA club.
The Health Service Executive's Public Health and Environmental Health Departments and Limerick City and County Council are probing the outbreak, which affected players on the senior camogie teams of Limerick and Wexford, as well as junior teams from Limerick and Kerry.
The teams all played at Croagh-Kilfinny GAA grounds last Saturday.
The HSE began its own inquiries after being informed by Limerick City and County Council that a number of players felt sick after their matches. They are trying to assess how many people were affected - it is understood to be fewer than ten.
It is understood the source of the outbreak may be a private water well in the locality.
The HSE is asking any player who was ill after the matches, who has not already been in contact with it, to make contact with their local departments of public health.
The HSE has also reiterated that the best way to avoid the spread of gastroenteritis is to wash hands with soap under warm water.
"If anyone in the house is suffering from vomiting or diarrhoea, the toilet and other areas should be cleaned and disinfected after use," it said in a statement.
"Any family member who is ill with diarrhoea or vomiting should use his or her own towel and should never prepare food for others until 48 hours after their diarrhoea and vomiting has stopped.
"In the same way, anyone who is ill with diarrhoea or vomiting should stay off work/school until they have been symptom free for 48 hours."
If any of the affected players or mentors are food workers, they have been warned that they have to stay at home or go home straight away if they develop symptoms.
The contact numbers for affected players are below:
Limerick: Department of Public Health, Limerick on 061-483338
Kerry: Department of Public Health, Cork on 021-4927601
Wexford: Department of Public Health, Kilkenny on 056-778414