TABLE 2.
Biochemical and phenotypic characteristics of the novel Helicobacter species from dolphins and other gastric Helicobacter speciesa
| Taxon | Catalase production | Nitrate reduction | Alkaline phosphatase hydrolysis | Urease activity | Indoxyl acetate hydrolysis | Gamma-glutamyl transpeptidase activity | Growth at 42°C | Growth with 1% glycine | Susceptibility to:
|
Periplasmic fibers | No. of flagella | Distribution of flagella | G+C content (mol%) | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Nalidixic acid (30-μg disc) | Cephalothin (30-μg disc) | |||||||||||||
| Helicobacter sp. from dolphin | + (3/3) | − (3/3) | − (3/3) | + (3/3) | − (3/3) | + (3/3) | + (3/3) | + (3/3) | S (3/3) | S (3/3) | ||||
| H. pylori | + | − | + | + | − | + | − | − | R | S | − | 4–8 | Bipolar | 35–37 |
| H. nemestrinae | + | − | + | + | − | ND | + | − | R | S | − | 4–8 | Bipolar | 24 |
| H. acinonychis | + | − | + | + | − | + | − | − | R | S | − | 2–5 | Bipolar | 30 |
| H. felis | + | + | + | + | − | + | + | − | R | S | + | 14–20 | Bipolar | 42 |
| H. mustelae | + | + | + | + | + | + | + | − | S | R | − | 4–8 | Peritrichous | 36 |
a
Symbols and abbreviations: +, positive reaction; −, negative reaction; S, susceptible; R, resistant; I, intermediate; ND, not determined. Numbers in parentheses are numbers of strains with the indicated result or number of strains tested.