TABLE 2.
Interpretation and percent positive reactions in conventional tests for identification of pyrrolidonylarylamidase-positive beta-hemolytic streptococci
| Species (n)a | Group carbohydrate antigen | Interpretation/% positive byb:
|
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Bac | CM | VP | Hip | Arg | Esc | Str | Sbl | Tre | Rib | ||
| S. pyogenes (20) | A | +/100 | −/0 | −/0 | −/0 | +/95 | V/20 | −/10 | −/0 | +/100 | NDc |
| S. porcinus (26) | E, P, U, V, new | −/0 | +/92 | +/85 | V/40 | +/98 | +/100 | −/0 | +/98 | +/100 | +/98 |
| S. iniae (14) | None | V/50 | +/93 | −/7 | −/0 | v/42 | +/100 | +/100 | −/0 | +/100 | +/100 |
a
All strains were gram-positive cocci in chains, beta-hemolytic on Frypticase soy-5% sheep blood agar, susceptible to vancomycin in a screen test, failed to produce gas in MRS broth, and yielded positive reactions for PYR and leucine amino peptidase.
b
Abbreviations: Bac, susceptibility to bacitracin; CM, CAMP reaction; VP, Voges-Proskauer reaction; Hip, hydrolysis of hippurate; Arg, deamination of arginine; Esc, hydrolysis of esculin; Str, hydrolysis of starch; Sbl, Tre, and Rib, production of acid in sorbitol, trehalose, and ribose broth, respectively.
c
ND, not determined.