Strains that trigger no symptoms in animals will make men and women sick, and vice versa. If current in food, it does not ordinarily have an impact on the taste, scent, or look with the foods. The microbes live in the intestinal tracts of infected animals and humans. FSIS https://socialbraintech.com/story4750718/the-2-minute-rule-for-comparison-of-botulinum-toxins