Health officials have narrowed their search for the source of an E. coli outbreak in Nova Scotia and New Brunswick to about a dozen possible sources.

The Global Dispatch reports, that health officials in New Brunswick, Canada are investigating an E. coli O157 outbreak, which has sickened at least five individuals. The five confirmed cases, two from the Saint John region and three from the Fredericton region required emergency room visits for their illnesses. One person required hospitalization and was admitted for treatment.

In Nova Scotia, the Chronicle Herald reports that three cases were confirmed today, bringing the number across the province to 10 since the first was reported a week ago. Five have been in the Capital health district, two in Guysborough Antigonish Strait, and one each in the Pictou, Cumberland and Colchester-East Hants districts.

“When you look at the geographic spread, the time frame of exposure and the food histories, from the outset, our hypothesis — and its a fairly solid one — is that we’re looking at some kind of manufactured food product or a food that’s been processed in some way that’s been widely distributed,” said Dr. Robert Strang, Nova Scotia’s chief public health officer. “Right now we’re looking at exposures more through restaurants rather than a food that’s been distributed through groceries.”