Honey is the food most commonly found to contain the bacteria causing botulism.
The American Academy of Pediatrics advises that honey should not be added to the food, water, or formula that is fed to infants younger than 12 months of age. This recommendation includes foods processed with honey. Honey is a known source of bacterial spores called Clostridium botulinum that produce a toxin which can cause infant botulism. These spores can also be found in soil, water, uncooked food, and even household dust. Infant botulism can occur from breathing in vacuum cleaner dust, but eating honey is the number one preventable cause.