title: Absence of immunogenicity of an oral vaccine against Mycobacterium johnei in sheep.
mesh_terms: D000284:Administration, Oral; D000818:Animals; D000917:Antibody Formation; D010283:Paratuberculosis / Q000276:immunology* / Q000382:microbiology; D012756:Sheep; D012757:Sheep Diseases / Q000276:immunology* / Q000382:microbiology; D014374:Tuberculin Test; D014611:Vaccination; D014613:Vaccines, Attenuated / Q000008:administration & dosage*
chemical_list: D014613:Vaccines, Attenuated