Key points
- No new cases have been added to the investigation since the last update on December 10, 2025.
- Going forward, we will provide new information when available, instead of updating the notice weekly.
- 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.
