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.
a young woman looks anxious as she stares out of the window photo credit marjan apostolovic istock getty images diarrhea is characterized by frequent watery or loose stools diarrhea can be caused from a wide variety of factors physical or otherwise the most basic cause of diarrhea is the insufficient absorption of water in the large intestine