Acute Gastroenteritis

Predisposing Factors

Etiology by Organism

General Comments

  • Most Cases of Infectious Diarrhea are Viral
    • Overall, Only 1.5-5.6% of Stool Cultures are Positive (Clin Infect Dis, 2001) [MEDLINE]
  • However, in Cases of Severe Diarrhea, Bacterial Etiologies are Responsible for Most Cases
    • In Health Adults with Severe Community-Acquired Diarrhea (Defined as ≥4 Liquid Stools Per Day for >3 Days), 87% of Cases Had an Identified Bacterial Etiology (Clin Infect Dis, 1996) [MEDLINE]




Eiology by Location

Clinical Manifestations

Gastrointestinal Manifestations

Diarrhea (see Diarrhea, Diarrhea)

  • Epidemiology
  • Clinical
    • Bloody Diarrhea: presence suggests Enterotoxigenic Escherichia Coli or Entamoeba


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  • Empirical treatment of severe acute community-acquired gastroenteritis with ciprofloxacin. Clin Infect Dis. 1996;22(6):1019 [MEDLINE]
  • Practice guidelines for the management of infectious diarrhea. Clin Infect Dis. 2001;32(3):331 [MEDLINE]