61.氯化血紅素(hemin)為下列那類細菌生長時所必需? (A)鏈球菌屬(Streptococcus) (B)卟琳菌屬(Porphyromonas) (C)凝聚桿菌屬(Aggregatibacter) (D)細梭細菌屬(Fusobacteria)