A selection of 5 bacterial tube cultures representing the cell wall makeup determined by the Gram-stain method, which is used as the first step in identifying a bacterium.
- Bacillus cereus (Gram-positive rod)
- Branhamella catarrhalis (Gram-negative coccus)
- Micrococcus luteus (Gram-positive coccus)
- Rhodospirillum rubrum (Gram-negative spiral)
- Serratia marcescens (Gram-negative rod)
