@TF,
Hello TF,
there are some long term effects of salmonella poisoning like bowl inflammation, gastrointestinal sensitivities to certain food and abdominal pains, cramping, weight loss and so on. There is really nothing you can do as the salmonella has weakened your gastrointestinal system, and these symptoms can be chronic, or if you're lucky, can subside in time.
As with food, it's really a trial and error situation where you have to find out yourself which food groups give you gastrointestinal problems and which ones do not.