On chocolate agar, colonies are small raised, glistening, andgray-white. The bacterial cells are gram-negative and spherical,tending to occur in pairs with adjacent sides flattened. In gramstain preparations made from smears of purulent material, the cellstend to be located intracellularly. Biochemical results are oxidasepositive, catalase positive, glucose positive, maltose positive,sucrose negative, lactose negative and beta lactamase positive.
