• actinomycete
• aerobacter
• agrobacterium
• Archaebacteria
• bacilli
• bacillus
• bacteria
• bacteriophage
• blue-green algae
• chlorobacteria
• cocci
• coccus
• cyanobacteria
• diplobacteria
• diplococcus
• endospore-forming bacteria
• enteric bacteria
• enterobacteria
• eubacteria
• flesh-eating bacteria
• gliding bacteria
• gram-negative bacteria
• gram-positive bacteria
• green nonsulfur bacteria
• green sulfur bacteria
• halobacteria
• halophiles
• lactic acid bacteria
• lactobacillus
• methanobacteria
• methanogens
• micrococcus
• Monera
• mycobacteria
• mycoplasma
• myxobacteria
• nanobacteria
• nitric bacteria
• nitrobacter
• nitrobacteria
• nitrosobacteria
• nitrosomonas
• nitrous bacteria
• photobacteria
• phototrophic bacteria
• phototropic bacteria
• pseudomonad
• purple bacteria
• purple nonsulfur bacteria
• purple sulfur bacteria
• rickettsia
• salmonella
• slime bacteria
• spherobacteria
• spirilla
• spirillum
• spirobacteria
• spirochete or spirochaete
• streptococcus
• streptomyces
• thermoacidophiles
• thiobacillus
• trichobacteria
• true bacteria
• vibrio
• vibrion
• vibros
• xanthomonas