Toronto Public Health is investigating three cases of Listeria infection in people who consumed deli sandwiches at the Druxy’s restaurant at Princess Margaret Cancer Centre.

(Toronto Star File Photo)

The restaurant’s closed while authorities investigate.

Hospitals, long-term care facilities and doctors’ offices have been made aware of the situation.

Anyone who ate deli meats at the location between January 1 to March 12, 2018 is asked to seek medical attention if they develop symptoms of Listeria infection, including fever, diarrhea, vomiting, nausea and cramps.

Severe symptoms include headaches, stiff neck, confusion, loss of balance and convulsions, and those with weakened immune systems, the elderly and pregnant women are at most risk.

Symptoms usually occur within three weeks of eating foods contaminated with Listeria.

Infections can be treated with antibiotics.