The latest update from the Centers for Disease Control and Prevention on the deadly multistate E. coli outbreak linked to romaine lettuce from the Yuma, Arizona, growing region brought a bit of positive news.

>> Read more trending news

While the CDC reported 23 more cases of illness from 13 states since the agency's May 9 update, the affected produce should no longer be available for sale.

The latest news release from the CDC posted on Wednesday said that the "last shipments of romaine lettuce from the Yuma growing region were harvested on April 16, 2018 and the harvest season is over. It is unlikely that any romaine lettuce from the Yuma growing region is still available in stores or restaurants due to its 21-day shelf life."

The CDC reports that, as of May 15, 172 people infected with the outbreak strain of E. coli O157:H7 have been reported from 32 states.