title: Production of reference PPD tuberculins for veterinary use in the United States.
mesh_terms: D009161:Mycobacterium / Q000276:immunology*; D009162:Mycobacterium avium / Q000276:immunology*; D009163:Mycobacterium bovis / Q000276:immunology*; D014373:Tuberculin / Q000302:isolation & purification*; D014730:Veterinary Medicine
chemical_list: D014373:Tuberculin