Health officials confirmed yesterday that they are investigating how a 6-year-old Millbury boy contracted E. coli O157:H7, but said his death appears to be an isolated case and is not linked to a recall of contaminated food.

“There are not any other reported cases at this time. We don’t consider this to be an active outbreak,” said Worcester Public Health Director Derek Brindisi, noting a public health nurse will retrace what foods the boy consumed, where he traveled and to what animals and water sources he had been exposed. “We will try to get a clear picture of how he became ill.”

The state Department of Public Health confirmed yesterday that little Owen Carrignan was exposed to E. coli. He died Saturday from complications of hemolytic-uremic syndrome, or kidney failure, a disease associated with E. coli infection.

The family, who buried Owen yesterday, said memorial contributions can be made to the Owen E. Carrignan Sports Scholarship for a deserving Millbury High School student, c/o Millbury Federal Credit Union, 50 Main St., Millbury, MA 0152