Evaluation of Diarrhea

Evidence for Malabsorption
Inflammatory Bowel Disease
Medications
Travel History
HIV Risk Factors
Raraly Infectious except Giardia
Irritable Bowel Syndrome

Infectious vs. Non-Infectious

Culture for Infectious

Non-Infectious

Secretory Diarrhea (Osm gap < 50)

Laxatives
Infections
Inflammatory Bowel
Short Bowel Syndrome
Hormone Secreting Tumors:

VIP,gastrin,5-HIAA

Lactose Intolerence
Magnesium Salts
Lactulose

Celiac Sprue
Whipple's Disease
Bacterial Overgrowth
Lymphoma
Pancreatic Insuffeciency

Infectious

Acute(< 1 month) vs. Chronic(> 1 month)

Acute

Chronic

Stool Leukocytes

Positive

Negative

Osm gap < 50

Ingestion

Malabsorption