The Centers for Disease Control reported 23 confirmed cases and 7 probable cases of illness from a strain of E. coli bacteria found in wholesale romaine lettuce.
Most of these cases were from Michigan, Ohio, Tennessee and New York State, but the distributor said the allegedly tainted batch of lettuce was sold to customers in 23 states and the District of Columbia.
NPR reports that the strain of E. coli in this recall is different than the more common 0157:H7 that is typically involved in food contamination. This strain, 0145, is tougher to detect and not often tested for.
Read More: How This Widening Lettuce Recall Is Different (NPR)