That school in the U.K. that closed a couple of classrooms in response to an apparent outbreak of E. coli O157:H7 has now been completely closed until further notice.

Two four-year-olds and one five-year-old have so far been taken to hospital but were said to be recovering yesterday. One was treated and discharged, with the other two still in hospital.

This Is Bristol reports that in the past week, parents of 28 other children reported they had mostly milder symptoms, typically stomach ache and diarrhea, with some children experiencing more severe symptoms such as bloody diarrhea.

The HPA said all affected children were being tested for E. coli O157 and initial test results indicated there were probably three with the infection.

Dr David Hunt, consultant with the HPA’s South West (North) Health Protection Unit, said: "We are working closely with Redfield Edge School and have now advised full closure of the school.

This is due to fact that the infection seems to have started to spread among older children, having started among year one and reception classes.”