| Presumptive Organism | Frequency | Gram Staining | IMViC | Catalase | Oxidase | KIA | ||||||
| Indole | MR | VP | Citrate | Slant | Butt | H2S | Gas | |||||
| Staphylococcus sp. | 11 | + | − | + | − | − | − | + | Yellow | Yellow | − | − |
| Micrococcus sp. | 4 | + | − | − | − | − | + | + | Red | Red | − | − |
| Bacillus sp. | 11 | + | − | + | − | − | − | + | Red | Red | − | − |
| Shigella sp. | 7 | − | − | − | − | − | − | + | Red | Red | − | − |
| Escherichia sp. | 9 | + | − | − | − | − | − | + | Red | Red | − | − |