Key points
- This outbreak investigation now includes 10 cases that occurred from December 2023 through July 2025.
- Infant botulism happens when a baby swallows Clostridium botulinum spores that grow in the gut and make toxin.
- Infant botulism often starts with constipation but is usually first noticed as difficulty feeding (sucking and swallowing), a weak and altered cry, and lack of head control.
