Public Health England has issued advice following cases of E.coli on the Isle of Wight.
There have been 10 cases of E.coli infections since September.
Health specialists are reminding people to make sure their hands are washed before eating or preparing food, or after contact with animals.
The illness causes diarrhoea and stomach pains and in rare cases can result in hospitalisation.
PHE is working with environmental health officers from Isle of Wight Council, and is waiting for results on a number of unconfirmed cases.
E.coli is a relatively common bug which can be easily picked up from touching animals or eating contaminated food. E.coli O157 is a particular strain of the bug and can cause a range of symptoms, from mild diarrhoea to severe abdominal pain and bloody diarrhoea and, on rare occasions, it can also cause more serious conditions.