ACUTE AND CHRONIC DIARRHEA - HOW TO KEEP LABORATORY TESTING TO A MINIMUM

Diagnosing a cause of diarrhea is a challenging undertaking but can be accomplished if a systematic approach is used for evaluation. Pathoph ysiologic mechanisms of acute diarrhea (eg, Giardia Lamblia infection, antibiotic use) are different from those of chronic diarrhea (eg, sec retory dysfunction from thyrotoxicosis, lactose or fructose intoleranc e), so adequate history taking and physical examination are essential in narrowing the diagnosis. Laboratory investigation can then be direc ted using the information obtained, and the cause of the diarrhea can be established without subjecting the patient to extensive and expensi ve testing. Undoubtedly, some functional entities that contribute to d iarrhea await discovery.