Mum-of-two Nina McLaren and her best friend Jodie Davies, both from Flint, became seriously ill after spending four days in the Spanish resort of Benidorm last month.
In total, 14 holidaymakers contracted E.coli O157 after stays in Benidorm during November.
Now travel lawyers at Irwin Mitchell, along with the Health Protection Agency, have launched an investigation into the source of the bacteria.
27-year-old Jodie told the Daily Post:
“The whole ordeal has been so distressing and painful that I really do wish we had never gone on holiday at all, it feels like we haven’t had one. … To learn that there were so many other people that fell ill with the same thing is a real worry. I wouldn’t wish it on anyone so it’s a relief to hear that there is an investigation into where the source was.”