Salmonella infections are very common, and may cause up to one-third of all the cases of diarrhea produced by contaminated food. The most commonly infected foods are: meats, chicken, milk, unpasteurized cheese, eggs and cocoa beans. The disease most commonly affects the gastrointestinal tract and resolves without treatment. Some strains of salmonella can cause the condition "typhoid" which causes bloodstream infection, abdominal pain, fever and a rash.