title: Radiommunoassay for antibodies against Mycobacterium paratuberculosis using 125I-labeled PPD.
mesh_terms: D000818:Animals; D000907:Antibodies, Bacterial / Q000032:analysis*; D001426:Bacterial Proteins / Q000302:isolation & purification; D002417:Cattle; D002418:Cattle Diseases / Q000175:diagnosis*; D007457:Iodine Radioisotopes; D009161:Mycobacterium / Q000276:immunology*; D010283:Paratuberculosis / Q000175:diagnosis*; D011863:Radioimmunoassay / Q000379:methods*
chemical_list: D000907:Antibodies, Bacterial; D001426:Bacterial Proteins; D007457:Iodine Radioisotopes