My clinical work includes gastroenterology, general internal medicine, intestinal infectious diseases, HIV infection and AIDS, travel medicine and medical effects of military occupational environmental exposures, especially in Persian Gulf, Afghanistan, Vietnam (Agent Orange) and Ionizing Radiation exposed veterans. I am also a Compensation & Pension examiner for the Department of Veterans Affairs.
My work has involved delineation of the structure and function of Peyer's patches and other mucosal
lymphoid organs, using ultrastructure, immunohistology, morphometric analysis, and FACS analysis in
immunocompetent and immunodeficient animal models. Clinical research interests include diarrhea and
intestinal infections, identifying the role of opportunistic pathogens including Giardia, Cryptosporidia,
Microsporidia and Mycobacterium avium.