Majority of patients can be treated as an outpatient
Observe or admit patients with severe dehydration and evidence of end-organ complications, significant comorbidities/immunosuppression, or inability to adequately orally rehydrate at home
Clostridium perfringens
Viral 
Bacillus cereus
Bacterial
Bacteroides fragilis
Campylobacter
Clostridium sordellii
Shigella