The purpose of this study was to observe the natural progression of untreated syphilis in rural African-American men in Alabama under the guise of receiving free health care from the United States government.
1 Diarrhea is caused by increased secretion of fluid into the intestine, reduced absorption of fluid from the intestine or rapid passage of stool through the intestine.  Symptoms associated with diarrhea include abdominal pain, especially cramping. Other symptoms depend on the cause of the diarrhea.
WebMD Symptom Checker helps you find the most common medical conditions indicated by the symptoms diarrhea and fatigue including Medication reaction or side-effect, Food poisoning, and Traveler's diarrhea. There are 104 conditions associated with diarrhea and fatigue. The links below will provide you with more detailed information on these medical conditions from the WebMD Symptom Checker and help provide a better understanding of causes and treatment of these related conditions.