In other cases, the organism invades macrophages and can become septicemic. Occasionally, the bug hides in the gall bladder and becomes latent. Here the patient has no symptoms but sheds infectious organisms for years. This is cause by S. typhimurium. The organism resides in a variety of animals, especially fowl.
Most cases arise due to improperly prepared chicken, turkey, and eggs.
Incubation time is about 24 hours, and the bacteria invade gut mucosal cells. Causes severe diarrhea, nausea, and cramps and generally resolves itself quickly. This is a severe disease with a 1-3 day incubation period. Inflammation of the gut causes the bleeding and a massive PMN infiltration. An exotoixin is also released that can penetrate into the central nervous system and may cause death.