TABLE 2.
Differential biochemical and phenotypic characteristics of Campylobacter insulaenigrae isolates from seals in California
| Pattern no. or speciesa | No. of isolates with pattern | Presence of:
|
Growth at/in:
|
Presence of:
|
Hippurate hydrolysis | Sensitivity tod:
|
|||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Catalase | Oxidase | 25°C | 42°C | 3.5% NaCl | 1.0% Glycine | Nitrate | H2S in TSI | Urease | Cephalothin | Nalidixic Acid | |||
| 1 | 22 | + | + | − | + | − | + | − | − | R | R | ||
| 2 | 6 | + | + | − | − | − | + | + | − | − | − | R | R |
| 3 | 13 | + | + | − | + | − | − | + | − | − | − | R | R |
| 4 | 2 | + | + | − | − | − | − | + | − | − | − | R | R |
| 5 | 11 | + | + | − | + | − | + | + | − | − | − | S | R |
| 6 | 3 | + | + | − | − | − | + | + | − | − | − | S | R |
| 7 | 12 | + | + | − | + | − | − | + | − | − | − | S | R |
| 8 | 2 | + | + | − | − | − | − | + | − | − | − | S | R |
| 9 | 1 | − | + | − | − | − | + | + | − | − | − | S | S |
| C. insulaenigrae | 4 | + | + | − | − | − | + | + | − | − | − | R | R |
| C. lari | + | + | −b | + | − | + | + | − | +/− | − | R | Rc | |
| C. upsaliensis | − | + | − | +c | − | + | + | − | − | − | S | S | |
| C. helveticus | − | + | − | + | − | +/− | + | − | − | − | S | S | |
a
Patterns 1 to 8 represent C. insulaenigrae, and pattern 9 represents a C. upsaliensis/C. helveticus-like strain. Biochemical and phenotypic characteristics of the related Campylobacter species C. lari, C. upsaliensis, and C. helveticus are provided for comparison. C. lari, C. upsaliensis, and C. helveticus characteristics are taken from the work of Lastovica and Skirrow (11a) and On (20). C. insulaenigrae characteristics are taken from the work of Foster et al. (3).
b
Some strains positive/resistant.
c
Some strains negative/sensitive.
d
S, sensitive; R, resistant.