Health officials have identified two further cases of E.coli 0157 linked to an outbreak in Dunfermline, Fife.
The adult cases are linked to the Dunfermline outbreak
The two adults bring to 13 the number of confirmed cases linked to the Careshare nursery at Lauder College.
Four children remain in hospital in Glasgow - two are improving and two remain stable. The two adults were both said to be feeling well.
Investigations into the source of the outbreak, which was first reported on 9 May, are continuing.
The nursery at Lauder College looks after about 100 children.
The incubation period for E.coli 0157 is usually between one and 14 days.
Symptoms can include diarrhoea, feeling sick, vomiting, stomach pain and fever.