A primary bacterial infectious disease that results_in infection, has_material_basis_in Mycobacterium avium complex (MAC), which is transmitted_by inhalation or transmitted_by ingestion of via the respiratory or gastrointestinal tract respectively. The bacteria cause disseminated infection in HIV infected people, while pulmonary disease in immunocompetent persons. [ http://purl.obolibrary.org/obo/ECO_0007637 ]