Cucumbers potentially contaminated with salmonella and linked to infections are being recalled in 15 states including Michigan.

A salmonella outbreak linked to cucumber items has reached 18 states, according to a Friday update from the Centers for Disease Control and Prevention, which identified the outbreak last week and said recalled cucumbers should no longer be on sale.

Salmonella causes symptoms from diarrhea and fever to severe, sometimes life-threatening infections in vulnerable groups. U.S. consumers are being urged to thoroughly inspect their deli, salad, and produce purchases, as healthy individuals are at risk.