Brucella Abortus of Bovine, Porcine and Equine Origin

Abstract

By the dextrose utilization method of McAlpine and Slanetz and by Huddleson''s dye-plate method, 136 strains of Br. abortus of bovine, porcine and equine origin were classified. Of 60 strains of bovine origin isolated in the U. S. A., 8 were porcine, and 52 bovine, type. Of 50 strains of bovine origin isolated in Europe, 48 were bovine type, while 2 appeared to be intermediate. All 22 strains of porcine origin utilized an appreciable amount of dextrose, as determined by quantitative analysis of broth cultures originally containing 1% dextrose. These cultures also behaved like the porcine type on dye plates. 4 strains of equine origin were bovine type.