From Washington: A total of 20 states are now affected by a parasitic illness outbreak. The number of people sickened has risen to 11,458. This outbreak is the largest of its kind in the US.

Further investigation has identified additional cases in several states. Government scientists are working to inspect and test produce.

The source of the outbreak is being investigated, with a focus on a specific farm. For more information on the outbreak and the investigation, further details are available.