Microbiological | | | | | | |
Gram smear | Gram negative rod | Gram positive rod | Gram positive rod | Gram negative rod | Gram positive rod | Gram positive rod |
Cell width ≥10 μm | – | – | – | – | V | – |
Motility | Non–motile | Motile | Motile | Motile | Motile | Motile |
Anaerobic growth | – | + | + | + | + | + |
Growth at 50°C | +* | V | – | – | – | – |
Growth at 65°C | – | – | – | – | – | – |
Growth in 7% NaCl | – | – | – | – | – | – |
Catalase production | +† | + | + | + | + | + |
Nitrate reduction | + | + | + | – | – | + |
Acid from glucose | – | + | + | + | + | + |
Casein hydrolysis | – | – | +† | + | + | + |
Voges-Proskauer reaction | – | – | – | – | + | + |
Clinical | | | | | | |
Cause of pseudobacteraemia | Yes | Yes | No | No | No | No |
Isolation from clinical specimens | No | Yes | No | No | Yes | Yes |