As Boar's Head recall-linked death toll climbs, here's what to know

As the tally of those stricken in a nationwide listeria outbreak tied to recalled Boar's Head deli meat rises, federal health officials are urging Americans to check their refrigerators for the products, some with sell-by dates into October.

The largest such outbreak since one linked to cantaloupes more than a decade ago has killed at least nine people and hospitalized 57 in 18 states, the Centers for Disease Control and Prevention said in an update on Wednesday. 

The Sarasota, Florida-based deli meat and cheese company last month expanded its recall to include more than 3,600 tons of ready-to-eat meat and poultry products sold under the Boar's Head and Old Country brands.