Figure 2. Alberta pork supplier network, pork-associated E. Coli 0157:H7 outbreak — Alberta, Canada, July-October 2014^1,2,3,4.

¹ Underlined facility = E. coli O157:H7–positive sample collected from the facility directly or indirectly (i.e., at home of outbreak case)
² Numbers in brackets = outbreak cases with exposure to facility
³ Some cases had multiple facility exposures
⁴ Four secondary cases are excluded