Hi im late to the party.
Any bacteria in chicken poop is already in you... and your dog etc. So you would have gotten sick from handling eggs, poop on shoes, picking up the birds ... actually least likely to be from the veggies because you rarely fertilize at harvest time. Google fecal oral bacteria transmission... you will be disgusted what is in your butt, and dogs and chickens and kids butt, always ends up back in your mouth.
Ive used a lot of raw manure... actually i say fresher the better before the ammonia vapors off. Usually i grow extra whatever... and let the chickens free range and poop on the crops... great after your corn is knee high. They eat bugs first, and whatever crop they pick off becomes eggs and fertilizer again.
Cant say ive had burned crops... only burned grass from the neighbors dogs. Dogs have pinworm and they will infect you... so never use dog poop. I have had double and triple yield from hot chicken poop... it can be overdone, just spread it side dressing .