PA reveals a Perthshire school was involved in an E.coli scare last week.
The nursery will undergo three days of deep cleaning as a “precautionary measure”.
Parents at the school were issued with letters from the health board with information on the infection.
The child was being tested for a non-O157 strain.
Speaking on Friday a spokesperson at NHS Tayside confirmed: “NHS Tayside’s health protection team is aware of and currently investigating a single suspected case of E. coli non O157 infection in a child who attends a nursery in Perthshire.
“As a precaution, a letter has been issued to parents of children at the nursery for information and reassurance.
“The risk to the wider public is very low.”