Bloody diarrhea

• Differential Diagnosis:
  Infective etiology
  
  Shigella
  Salmonella
  Campylobacter
  Enterohemorrhagic E. coli (EHEC, undercooked beef)
  Enteroinvasive E. coli
  Entamoeba histolytica
  Yersinia enterocolitica (pet feces, pseudoappendicitis)
  
  Inflammatory bowel disease
  
  Chron's disease
  Ulcerative colitis