T-Cell Responses to Mycobacterium avium PPD Antigens in Gastro-intestinal Helminth Co-infected Chickens in Central Ethiopia. - Tadesse, S.; Woldemeskel, M.; Medhin, G.; Tibbo, M.; Molla, B.; Abate, G.; Britton, S. (Journal of Immunoassay & Immunochemistry, 2003)