Review Article
Behavior of Yersinia enterocolitica in Foods
Table 1
Biochemical tests used to biogroup Y. enterocolitica strains.
| Test | Reaction for biotypea | 1A | 1B | 2 | 3 | 4 | 5 |
| Lipase activity | + | + | − | − | − | − | Salicin (acid production in 24 h) | + | − | − | − | − | − | Esculin hydrolysis (24 h) | +/− | − | − | − | − | − | Xylose (acid production) | + | + | + | + | − | V | Trehalose (acid production) | + | + | + | + | + | − | Indole production | + | + | V | − | − | − | Ornithine decarboxylase | + | + | + | + | + | + | Voges-Proskauer Test | + | + | + | + | + | + | Pyrazinamidase activity | + | − | − | − | − | − | Sorbose (acid production) | + | + | + | + | + | − | Inositol (acid production) | + | + | + | + | + | + | Nitrate reduction | + | + | + | + | + | − |
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aPositive, negative; /: delayed positive; V: variable.
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