English Porphyromonas gingivalis Cited by user 2603:7080:A3F0:88D0:75C1:ECB9:5512:6534 on 15 May 2024 Porphyromonas gingivalis belongs to the phylum Bacteroidota and is a nonmotile, Gram-negative, rod-shaped, anaerobic, pathogenic bacterium.