The HSE has launched a probe after the mid-west region saw an increase in the presence of E.Coli.
The Mid-West region, which covers Limerick, Clare and North Tipperary, issued the alert on Monday afternoon, warning people of the severe symptoms associated with the virus.
A spokesperson said: "We would like to emphasise the importance of the effective treatment of private well water and washing hands, following a noticeable increase in Verotoxigenic E. Coli (VTEC) cases and outbreaks in the region in recent weeks."
The exact stats make for concerning reading, with more than 20 VTEC cases notified in the region between week 31 and week 34 of the year so far, including a number of hospitalisations.
They also explained just how you can avoid contracting it.
The spokesperson added: "If your private well water is not treated, the water you are drinking could be contaminated and cause illness. There are a number of ways you can treat your well, and you may able to avail of local authority grants
"Wash your hands properly, particularly when on or near farm settings/petting zoos, before and after preparing food, always before eating, after using the toilet or changing nappies, thoroughly wash raw vegetables before eating, always cook meat fully."
VTEC (E.Coli) symptoms
VTEC are bacteria that can cause stomach pains and diarrhoea sometimes streaked with blood., and they occur more frequently during spring and late summer.
In addition to causing severe stomach pains and diarrhoea, VTEC can cause a serious condition known as Haemolytic Uremic Syndrome (HUS), which results in the breakdown of red blood cells and kidney failure.
A small number of HUS cases have been confirmed.
Between 5-10% of VTEC cases, particularly children under five and the elderly, will suffer from HUS, with some requiring dialysis. Five percent of people who develop this serious condition may die.
What causes VTEC (E.Coli)?
Farm animals, especially cattle, carry VTEC in their bowels. Infection can be acquired through contact with farm animals or their environment, from eating unwashed or undercooked contaminated food.
It can also occur from drinking water from contaminated wells, and from contact with people infected with VTEC such as in household or childcare settings where there is nappy changing or shared toilet facilities.
The Mid-West region has one of the highest rates of VTEC in Ireland, and Ireland has one of the highest rates in Europe.
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