| Achromobacter xylosoxidans |
| Acinetobacter baumannii |
| Acinetobacter lwoffii |
| Actinomyces israelii |
| Actinomyces odontolyticus |
| Aerococcus viridans |
| Aeromonas hydrophila |
| Alcaligenes faecalis |
| Bacillus species |
| Bacteroides distasonis |
| Bacteroides fragilis |
| Bacteroides ovatus |
| Bacteroides thetaiotaomicron |
| Bacteroides ureolyticus |
| Bacteroides vulgatus |
| Bordetella - Gram stain |
| Bordetella bronchiseptica |
| Bordetella parapertussis |
| Bordetella pertussis |
| Burkholderia cepacia |
| Campylobacter - Gram stains |
| Campylobacter species |
| Capnocytophaga species |
| Citrobacter freundii |
| Citrobacter koseri |
| Clostridium butyricum |
| Clostridium clostridioforme |
| Clostridium difficile |
| Clostridium innocuum |
| Clostridium perfringens |
| Clostridium ramosum |
| Clostridium septicum |
 | Microscopic morphology |
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| Colonial morphology |
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| Clostridium sordellii |
| Clostridium sporogenes |
| Corynebacterium diphtheriae |
| Corynebacterium species |
| Edwardsiella tarda |
| Eggerthella lenta |
| Eikenella corrodens |
| Elizabethkingia meningosepticum |
| Enterobacter aerogenes |
| Enterobacter cloacae |
| Enterobacter sakazakii |
| Enterobacteriaceae - Gram stains |
| Enterococcus - Gram stain |
| Enterococcus faecalis |
| Enterococcus faecium |
| Erysipelothrix rhusiopathiae |
| Escherichia coli |
| Escherichia coli O157:H7 |
| Finegoldia magna |
| Fusobacterium mortiferum |
| Fusobacterium necrophorum |
| Fusobacterium nucleatum |
| Fusobacterium varium |
| Gardnerella vaginalis |
| Haemophilus - Gram stain |
| Haemophilus haemolyticus |
| Haemophilus influenzae |
| Haemophilus parahaemolyticus |
| Haemophilus parainfluenzae |
| Hafnia alvei |
| Klebsiella oxytoca |
| Klebsiella pneumoniae |
| Lactobacillus species |
| Legionella - Gram stains |
| Legionella species |
| Listeria monocytogenes |
| Micrococcus - Gram stain |
| Micrococcus species |
| Micromonas micros |
| Moraxella catarrhalis |
| Morganella morganii |
| Mycobacterium - stains |
| Mycobacterium abscessus |
| Mycobacterium avium complex |
| Mycobacterium bovis |
| Mycobacterium chelonae |
| Mycobacterium fortuitum |
| Mycobacterium gastri |
| Mycobacterium gordonae |
| Mycobacterium haemophilum |
| Mycobacterium kansasii |
| Mycobacterium marinum |
| Mycobacterium mucogenicum |
| Mycobacterium phlei |
| Mycobacterium scrofulaceum |
| Mycobacterium simiae |
| Mycobacterium szulgai |
| Mycobacterium tuberculosis |
| Mycobacterium xenopi |
| Neisseria - Gram stain |
| Neisseria gonorrhoeae |
| Neisseria lactamica |
| Neisseria meningitidis |
| Neisseria species |
| Pasteurella multocida |
| Peptoniphilus asaccharolyticus |
| Peptostreptococcus anaerobius |
| Plesiomonas shigelloides |
| Prevotella melaninogenica |
| Propionibacterium acnes |
| Proteus mirabilis |
| Proteus vulgaris |
| Providencia alcalifaciens |
| Providencia rettgeri |
| Providencia stuartii |
| Pseudomonas - Gram stain |
| Pseudomonas aeruginosa |
| Pseudomonas fluorescens |
| Rothia mucilaginosa |
| Salmonella species |
| Serratia marcescens |
| Shigella species |
| Staphylococcus - Gram stain |
| Staphylococcus aureus |
| Staphylococcus saprophyticus |
| Staphylococcus, coagulase negative |
| Stenotrophomonas maltophilia |
| Streptococcus - Gram stains |
| Streptococcus agalactiae |
| Streptococcus bovis |
| Streptococcus pneumoniae |
| Streptococcus pyogenes |
| Streptococcus sanguis |
| Veillonella species |
| Vibrio - Gram stains |
| Vibrio alginolyticus |
| Vibrio cholerae |
| Vibrio parahaemolyticus |
| Vibrio vulnificus |
| Yersinia enterocolitica |