63.一位養豬場獸醫師手指浮腫且出現紫斑，反覆發燒，經血液培養為革蘭氏陽性桿菌，Columbia blood agar plate(BAP)上呈現α-溶血，catalase (－)，oxidase (－)，具 gelatinase，最可能為下列何種病原菌？ (A)Erysipelothrix rhusiopathiae (B)Listeria monocytogenes (C)Bacillus anthracis (D)Corynebacterium diphtheriae