Gastroenteritis (viral, bacterial, parasitic)
Posted by dkwinter

See also:
     Abdominal pain Ddx
     Constipation/diarrhea Ddx
     Pediatric fever Ddx
Hx
     Watery diarrhea
     Vomiting
     Lethargy (esp. in pediatric patients)
     Diffuse crampy abdominal pain
     Abdominal cramps
     Duration of about 24 hours
     Low-grade fever
     Coworkers/family members may have similar sx
     Recent travel
     Child who attends day care with other sick children
Sx (viral gastroenteritis)
     Vomiting
     Watery diarrhea
Sx (bacterial gastroenteritis)
     Fever
     Tenesmus
     Bloody diarrhea
     Severe abdominal pain
Workup
     Physical exam
          Note: rebound tenderness suggests more severe etiology
     Rectal exam, stool for occult blood
     Stool
          Leukocytes
          Culture
          Giardia antigen (if recent travel)
          Entamoeba histolytica antigen (if recent travel)
     CBC
     Electrolytes
     AST/ALT/bilirubin/ALP
     Viral hepatitis serology
     CT-abdomen/pelvis
Ddx
     Enterotoxigenic E. coli