Five cases of E. coli O157 linked to a food premises in Tenby are been investigated by Pembrokeshire County Council's public protection department and the National Public Health Service for Wales (NPHS).

Two children from the same family in West Yorkshire have been confirmed as having E. coli O157, as have two adult males from Newport in South East Wales and Pembrokeshire and an adult female from Carmarthenshire.

All five people ate at the same food premises between July 31 and August 15. 

The patients are all recovering at home and none has required hospital treatment.

The food premises closed voluntarily, but has now reopened in agreement with Pembrokeshire County Council's public protection department.

E. coli O157 is a potentially serious bacterial infection that causes abdominal pain and diarrhoea. The symptoms of E. coli O157 range from mild diarrhoea, stomach cramps and fever to bloody diarrhoea. Most people recover without complications, but the most severe cases can develop kidney failure. 

Dr. Jörg Hoffmann, consultant in communicable disease control for the NPHS, said: "People can become infected with E. coli O157 by contact with an infected person or from eating contaminated food. The illness can also be associated with direct or indirect contact with animal faeces, particularly on farms and sites used for camping, and swimming in or drinking unchlorinated water.

"Anyone who has symptoms associated with E.coli infection should seek urgent medical advice. They should also observe strict personal hygiene to prevent further spread of the illness within the family.

"People should wash and dry their hands thoroughly after going to the toilet and before preparing or eating food. Parents of small children should supervise young children whilst washing their hands. Disinfecting all areas of the bathroom regularly, including hard surfaces and toilet and door handles, can also help limit the risk of further infection."

The incubation period for E. coli O157 can range from one to 14 days, but is characteristically three to four days. The length of the illness can vary but people with E. coli O157 are usually ill for up to two weeks.

Footnote: Tenby Chamber of Trade and Tourism discussed the matter on Wednesday, but when contacted by the Observer, said it was inappropriate to make a comment.