The first article I had on this subject came from the Jrnl of
Food Protection, Vol. 45 Sept., 1982 by Kautter DA., et.al -
Clostribium botulinum spores in infant foods: A survey.  C
botulinum spores were detected in 5 of 961 bottles sampled.
Then in the same journal in 1991, Vol 54 by Lilly T, et. al
(FDA study) - Clostridium botulinum spores in corn syrup
and other syrups, the results showed that corn syrup and
other syrups currently on the market are not food sources of
botulinum spores for infants.