Centers for Disease Control and Prevention
Centers for Disease Control: Travelers' Health: Disease Directory
The Centers for Disease Control and Prevention provides information on over 40 diseases that travelers might need to be prepared for. Information includes description of disease, risk for travelers, preventive measures and treatment.
Other
Utah Department of Health: Amebiasis (Amebic Dysentery) [Pdf]
Frequently asked questions about amebiasis, an intestinal illness caused by a parasite, "What is Amebiasis?", "Who gets Amebiasis?", symptoms and many other details of the illness are explained in detail.