| Description | Bacteria |
| Gram-positive bacillus, strict anaerobe, haemolysis, leaf-like colonies | |
| Gram-negative coccus, usually diplococci or tetrads, oxidase positive, small colourless colonies, causes meningitis | |
| Gram-positive bacillus, curved, polymerized polyphosphate granules on Albert's stain, obligate aerobe | |
| Gram-positive bacillus, strict anaerobe, highly proteolytic, foul-smelling, off-white colonies with irregular edge, some haemolysis | |
| Gram-positive coccus, chains/diplococci, alpha-haemolysis, tiny 0.5mm diameter colonies | |
| Gram-negative coccus, usually diplococci or tetrads, oxidase positive, small colourless colonies, causes gonorrhoea | |
| Gram-positive coccus, grape-like clusters, coagulase negative, off-white | |
| Gram-positive coccus, grape-like clusters, coagulase positive, orange-yellow | |
| Gram-positive coccus, chains/diplococci, alpha-haemolysis, 2.0mm diameter colonies with sunken centres | |
| | Description | Bacteria |
| Gram-negative bacillus, watery off-white flat colonies | |
| Gram-positive coccus, chains/diplococci, beta-haemlysis, Lancefield test A | |
| Gram-negative bacillus, lactose-fermenting, big white colonies with diffuse edge | |
| Gram-negative coccus, usually diplococci or tetrads, oxidase positive, small colourless colonies, commensal | |
| Gram-negative bacillus, strict anaerobe, smell of faeces | |
| Gram-positive coccus, chains/diplococci, usually no haemolysis, usually oval, Lancefield D, lactose-fermenting | |
| Gram-positive ellipsoid cells, strongly staining, may show budding | |
| Gram-positive bacillus, strict anaerobe, wispy colonies or swarms over plate, haemolytic | |
| Gram-negative bacillus, very large colonies with green diffusible pigment, dense centre with paler, more diffuse surround, obligate aerobe | |
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