About these resources
The list on this page primarily represents multistate investigations involving Clostridium botulinum or botulism where CDC was the lead public health agency.
Public health officials investigate outbreaks to control them, so more people do not get sick, and to learn how to prevent similar outbreaks from happening in the future.
Active outbreaks and investigations
Details on an outbreak of infant botulism linked to infant formula, November 2025.