date:Dec 04, 2012
D.C. Public Health Laboratory (PHL). Through query of PulseNet, the national molecular subtyping network for foodborne disease surveillance, six additional cases were identified in three states (Maryland, Michigan, and Virginia) during the prior 60 days. All nine patients had eaten at restaurants in D.C. or northern Virginia less than 2 weeks before illness onset.
PulseNet was used throughout the investigation to monitor the outbreak PFGE pattern. Cases were defined as laboratory-confirmed Salm