Salmonellosis is an illness caused by Salmonella bacteria. An infection with these bacteria usually affects the gastrointestinal system (the stomach and intestines) in humans. In more severe cases, Salmonella can spread to the blood, the bones, or even to the fluid around the brain, but these types of infection are less common.

  1. People who get salmonellosis may have these symptoms:
  2. nausea
  3. vomiting
  4. painful stomach cramps
  5. diarrhea, which could be bloody
  6. Salmonellosis also may cause a headache and fever.