Per Charles L:

> botulinum (botulism)	270 ppb
> tetanospasmin (tetanus)	75 ppb
> 
> How does one compare a bacteria that will multiply to this concept? Not sure how one applies that LD factor or a reproducing organism?

LD-50s describe concentrations of the protein (read toxin) only, not the bacteria producing it. C botulinum is an anaerobe, thus the danger in improperly sterilized canned foods--particularly if the contents are meant to be eaten cold.

Interesting as a side note, botulinum toxin is the active ingredient in Botox--paralyzing facial muscles on injection to get rid of those pesky wrinkles. Smile!

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