Temperature (°C) | Growth (CFU/ml) |
---|---|
4 | 0 |
30 | 4.2 × 103 |
37 | 34 × 104 |
40 | 18 × 104 |
55 | 0 |
Characteristic | HN31(22) | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
---|---|---|---|---|---|---|---|---|---|---|---|
Morphology | Short roads | Short roads | Short roads | Short roads | Short roads | Cocci | Short roads | Cocci | Cocci | Cocci | Cocci |
Tincion | HN31(22) | Gram + | Gram + | Gram + | Gram + | Gram + | Gram + | Gram + | Gram + | Gram + | Gram + |
Colony pigmentation | Yellow | Yellow | Yellow | Yellow | Yellow | Orange/Yellow | Yellow | Orange/Yellow | Yellow | Yellow | White ivory |
Temperature (°C) | 30–40 | 40–42 | 8.5–42 | 35–37 | 20–40 | 4–40 | 25–40 | 4–36 | 4–36 | 4–36 | NR |
pH | 5–11 | 8–12 | 7.5–9.5 | 7–11 | 7–12 | 7–9 | 7–11 | 5–12 | 6.5–10 | 6–8.5 | 6–10.5 |
NaCl (%) | 0–20 | 0–10 | 0–15 | 0–18 | 0–25 | 0–25 | 3–12 | 1–15 | 0–20 | 0–16 | 0.5–30 |
Catalase | + | + | NR | + | NR | NR | + | NR | NR | NR | NR |
Oxidase | – | – | – | – | – | – | + | – | – | – | – |
Urease | – | NR | NR | NR | + | + | – | – | – | – | NR |
Nitrate reduction | – | – | – | + | – | – | NR | – | + | – | + |
Citrate test | + | – | W | – | NR | NR | – | NR | NR | NR | NR |
Voges-Proskauer | – | – | – | – | NR | NR | – | – | – | + | NR |
Acid produced from: | |||||||||||
Galactose | – | – | – | – | – | – | – | + | + | + | NR |
Trehalose | + | – | + | – | – | – | – | W | + | W | – |
Mannitol | + | – | – | – | – | – | – | + | + | + | NR |
Sucrose | + | NR | NR | – | – | – | – | NR | NR | NR | – |
Fructose | + | NR | NR | + | – | – | + | NR | NR | NR | NR |
Utilization of: | |||||||||||
Glucose | + | + | NR | + | + | + | + | + | W | + | + |
Trehalose | + | – | + | – | – | – | – | + | – | + | NR |
Fructose | – | + | + | + | + | + | + | + | + | + | + |
Mannose | + | + | + | + | + | + | – | + | + | W | + |
Sucrose | + | + | NR | + | + | + | W | + | + | + | NR |
Maltose | + | + | NR | – | + | + | NR | + | + | + | NR |
Hydrolysis of: | |||||||||||
Starch | + | + | – | + | – | – | + | – | + | – | – |
Gelatin | + | + | – | NR | + | + | + | + | – | – | NR |
Tween 80 | + | + | – | + | NR | NR | NR | – | – | – | – |
Casein | + | NR | NR | – | + | – | + | – | + | NR | – |