TABLE 5.
Phenotypic characteristics, including API rapid ID 32 Strep-based tests, potentially useful in the identification of H. ovis and its discrimination from other Helcococcus species and the pyridoxal-dependent species A. defectiva, G. adiacens, and G. elegans
| Phenotypic characteristic | Result for speciesa (source)
|
|||||
|---|---|---|---|---|---|---|
| H. ovis (animal) | H. kunzii (human) | H. sueciensis (human) | A. defectiva (human) | G. adiacens (human) | G. elegans (human) | |
| Satellitism/pyridoxal dependency | + | − | − | + | + | + |
| Hemolysis on sheep blood agar | γ | γ | γ | α | α | α |
| Arginine dihydrolase | − | − | − | − | − | + |
| α-Galactosidase | − | − | − | + | − | − |
| β-Galactosidaseb | + | + | + | + | − | − |
| β-Galactosidasec | − | − | + | + | − | − |
| β-Glucuronidase | V | − | − | − | + | − |
| Hippurate hydrolysis | − | − | − | − | − | + |
| Pyroglutamic acid arylamidase | − | + | − | + | + | + |
| Sucrose | − | − | − | + | + | + |
a
+, V, and −, ≥85%, 16 to 84%, and ≤15% of strains were positive, respectively.
b
With resorufin-β-d-galactopyranoside as the substrate.
c
With 2-naphtyl-β-d-galactopyranoside as the substrate.