The knowledge of food poisoning can absolutely stop food poisoning by several factors:
Food handlers do so in a way to ensure the cleanest of conditions and eliminate the possibilities of cross contamination.
Food preparers do so in a way as to prevent cross contamination.
Food purchasers do so in a way as to ensure their suppliers follow strict, pre-established guidelines ensuring the best possible products.
Consumers use "fresh food wash" type cleaners to ensure the foods are salmonella, e.coli, bacteria, insecticide and food borne pathogen free before preparing and cooking the foods.
The CitroBio Fresh Food Wash has been shown in independent testing to stop food poisoning, salmonella, e.coli and other food borne pathogens.
If there is anything further I can assist you with or if you feel I did not answer your question thoroughly, please let me know ASAP and I will elaborate.