M0nica
LtEve Working on the 'eating a peck of dirt before you die' assumption will have no effect on your likeliness to go down with food poisoning.
Food poisoning is almost always caused by bacteria in animal based foods, illnesses like salmonella, listeria, campylobacter and clostridium and are the result of mishandling of foodstuffs, almost always in catering establishments. Now hygiene rules in catering establishments are so strict there are far fewer cases and they are mainly in institutional settings.
It is over 50 years since I last had food poisoning, mainly because I am fussy where I eat out and, despite the fashion for serving meat 'pink' (raw red in most cases). I do not eat meat or fish anywhere that hasn't been fully cooked.
I am well aware of the causes of food poisoning but good gut health does help to support a healthy immune system and not being ‘too sterile’ has been shown to help with this.