I think the term "ptomaine poisoning" was coined in the days before the germ theory of disease was accepted. When it could be shown that food poisonings were caused by toxins produced by Salmonella and similar bacteria, the idea that toxic protein breakdown products caused the symptoms was discared. About a hundred years ago.
The name Salmonella has been changed, I think. I'm not sure what the present name is. Vika, where are you?