Table. Identification of organism isolated from cerebrospinal fluid of 59-year-old woman with meningitis, Manitoba, Canada*.
| Test | Streptococcus suis (3) | Patient isolate |
|---|---|---|
| α-hemolysis on sheep blood agar | + | + |
| Motility | – | – |
| Catalase | – | – |
| Oxidase |
ND |
– |
| Fermented | ||
| l-arabinose | – | – |
| d-glucose | + | + |
| Glycerol | – | – |
| Inulin | + | + |
| Lactose | + | + |
| Maltose | + | + |
| Mannitol | – | – |
| Melezitose | – | – |
| Melibiose | Variable | + |
| Raffinose | Variable | + |
| Ribose | – | – |
| Salicin | + | + |
| Sorbitol | – | – |
| Sucrose | + | + |
| Trehalose |
+ |
+ |
| Hydrolyzed | ||
| l-arginine | + | – |
| Esculin/bile esculin | +/ND | ± |
| Starch | + | + |
| Glycogen | + | + |
| Hippurate |
– |
– |
| Acetoin | – | – |
| Optochin disk |
Resistant |
ND |
| Enzymes | ||
| α-galactosidase | + | + |
| β-galactosidase | Variable | + |
| β-glucuronidase | + | + |
| Leucine arylamidase | + | + |
| N-acetylglucosaminidase | + | + |
| Acid phosphatase | – | – |
| Alkaline phosphatase | – | – |
| Pyrrolidonylarylamidase |
– |
– |
| API Strep code | 4640473 high degree (97%) confidence S. suis |
*+, positive; –, negative; ND, not done; API Strep code, API 20 Strep, API System (bioMérieux, St.-Laurent, Quebec City, Canada).