TABLE 1.
Characteristics of contaminant bacteria in stored blood samples
| Test or characteristic | Result |
|---|---|
| Gram staining | + |
| Morphology | Spherical (tetrads or pairs) |
| Catalase reaction | + |
| Pyrolidonyl allylamidase reaction | + |
| Leucine allylamidase reaction | − |
| Growth under anaerobic conditions | + |
| Growth in air or reduced oxygen tension | + |
| Growth in 6.5% NaCl at 10°C | + |
| Growth in 6.5% NaCl at 45°C | − |
| Growth on blood agar | Green colonies |
| Growth on nutrient agar | Flat, white colonies |
| Gas production during growth | − |
| Voges-Proskauer test in culture for 7 days | − |