E. coli: Inside Alberta's 2014 outbreak

Alberta Health Services declared an outbreak of the bacteria E. coli 0157:H7on July 29, 2014.

• Alberta's largest E. coli outbreak in 15 years linked to raw pork products
• IN DEPTH |Understanding E. coli: symptoms, spread, prevention

This is not uncommon in Alberta as the provincehasthe highest rates of E. coli infection in the country.

But what issurprising ishow long it took health officials to find the source of the outbreak and the unusual culprit.

Followthe path of this pathogen in the interactive timeline below.