Approach to Chronic Diarrhea

  • Entamoebainfection is a rare cause of travelers diarrhea, however it can cause a more chronic diarrhea compared to most travelers diarrhea which is acute.  90% of Entamoeba infections are asymptomatic.  If the patient has a high pretest probability for Entamoeba infection then you should get three O&P samples as only 73% are positive on the fist sample. (Am. J. Trop. Med; 53:36-39)