Two people are being treated in hospital after a suspected E coli O157 outbreak in north Wales.
One woman is on a life-support machine, according to her family. Health officials say a total of four people have been taken ill.
The Llay Fish Bar in Llay, Wrexham has been closed.
The BBC has named one of the patients as Karen Morrisroe-Clutton, who has an 11-week-old baby being cared for by its grandparents. Her husband, Paul, is at her bedside at Wrexham Maelor hospital.
Rose Morrisroe, her mother, told the BBC her daughter had bought a veggie burger at the premises being investigated. She had been in intensive care since last week and was being kept in a medically induced coma. She was on a dialysis machine and had shown slight improvement.
A three-year-old girl is also being treated for renal failure in Alder Hey hospital in Liverpool.