厭氧菌之菌落形態的敘述，下列何者錯誤？
Fusobacterium nucleatum 呈麵包屑狀
Bacteroides ureolyticus 可形成凹陷（pitting）菌落
Actinomyces israelii 呈臼齒狀菌落
Clostridium difficile以紫外光照射不產螢光
