Group Listing Aerobes: GNC Aerobes: GNR - Enterobacteriaceae Aerobes: GNR - Haemophilus, HACEK and others Aerobes: GNR - Nonfermenters Aerobes: GPC Aerobes: GPR Bacillus species Corynebacterium diphtheriae Corynebacterium species Erysipelothrix rhusiopathiae Gardnerella vaginalis Microscopic morphology 1000x Gram stain, plate 1000x Gram stain, plate Colonial morphology Choc | Close-up Lactobacillus species Listeria monocytogenes Anaerobes: GNC Anaerobes: GNR Anaerobes: GPC Anaerobes: GPR Anaerobes: GPR, Spore-forming Mycobacteria