1. Jean-Paul Chretien, MD, PhD, MHS, was, at the time this article was written, a Resident, Division of Preventive Medicine, Walter Reed Army Institute of Research, Silver Spring, Maryland. He is currently the Preventive Medicine Officer, Commanding General, II Marine Expeditionary Force, Camp Lejeune, North Carolina. Samuel L. Yingst, DVM, PhD, is the Officer in Charge of Infectious Disease Diagnostics, 1st Area Medical Laboratory (Theater Reference Laboratory) Task Force, 62d Medical, Kandahar Airfield,...