08/23/2013 03:17 EDT | Updated 10/23/2013 05:12 EDT

Toronto Public Health updates on cronut burger probe

Was it the cronut burger?

Toronto Public Health has called a news conference for later this afternoon to provide an update on the ongoing investigation into what caused food poisoning at the Canadian National Exhibition. The cronut burger, a beef patty with maple-bacon jam between a donut-croissant pastry, has thus far been the suspected source.

Up to 100 people have reported illness after eating at the CNE.

Epic Burgers and Waffles, the creator of the cronut burger, was closed by the CNE for most the week.

On Tuesday, 12 people reported feeling ill after eating at the Food Building at the CNE, with five being treated in hospital. Then 34 people reported feeling sick after eating at the annual fair with dozens more reports being received afterwards.

The following day Epic Burgers was subject to a three-hour inspection although health officials have yet to confirm the source of the illnesses.

Toronto Public Health had said those tests on food samples wouldn't be available until Friday at the earliest.

Epic Burgers posted a message on its Facebook page on Thursday saying it would cooperate fully with the investigation and the company stood by its staff and products.

"In the time that we've been operating at the CNE, we have had a clean bill of health and all our staff have been fully trained in food safety," the statement said.