TABLE 6.
Potentially useful tests included in the IDS system for identification of unusual gram-positive cocci
| Species | % Strains positivea with:
|
|||||
|---|---|---|---|---|---|---|
| Arg | GAL | PO4 | TYR | LYS | PYR | |
| D. pigrum | 79 (v) | 9 (–) | 6 (–) | 93 (+) | 97 (+) | 91 (+) |
| F. hominis | 100 (+) | 100 (+) | 100 (+) | 100 (+) | 100 (+) | — (−) |
| F. ignava | 60 (v) | 40 (v) | 40 (v) | 100 (+) | 100 (+) | 20 (v) |
| F. languida | — (−) | — (−) | 17 (v) | 100 (+) | 100 (+) | 67 (v) |
| F. sourekii | — (−) | — (−) | — (−) | 67 (v) | 67 (v) | 100 (+) |
| F. tabacinasalisb | — (−) | 100 (+) | — (−) | — (−) | — (−) | — (−) |
| I. ruoffiae | 67 (v) | — (−) | — (−) | — (−) | 100 (+) | 67 (v) |
a
The number is the percentage of strains found to be positive; the interpretation of the test result is indicated in parentheses as positive (+), negative (−), or variable (v). Abbreviations: Arg, arginine; GAL, p-nitrophenyl-α-galactoside; PO4, p-nitrophenyl phosphate; TYR, tyrosine β-naphthylamide; LYS, lysine β-naphthylamide. —, 0% positive.
b
Type strain only, no human isolates tested.