Dr. El-Zaatari's areas of expertise include Molecular-microbiology, Molecular-immunology, and Molecular-genetics; Diagnostics and Research. He is currently researching molecular characterization of Mycobacterium paratuberculosis and its role in pathogenesis of Crohn's disease and sarcoidosis in humans and Johne's disease in animals.
Dr. El-Zaatari has published many papers dealing with the relationship between MAP and human disease, specifically Crohn's Disease and Sarcoidosis.
Published works include "Screening of a M. paratuberculosis expression library with polyclonal antiserum and amplified DNA probes to identify species-specific immunodominant antigens." and "Recombinant clone expressing Mycobacterium paratuberculosis antigen recognized by antibodies from Crohn's disease patients."