Table 1 Phenotypic characterization of Streptococcus iniae isolates from European eel (Anguilla anguilla) (wild strain) compared with two reference strains
From: Mortality in farmed European eel (Anguilla anguilla) in Italy due to Streptococcus iniae
ATCC 29178 [12] | CIP 102508 [13] | Wild strain | |
|---|---|---|---|
Gram stain | + | + | + |
Cell morphology | Cocci | Cocci | Cocci |
Motility | − | − | − |
Catalase test | − | − | − |
Oxidase | − | − | − |
Growth on MacConkey agar | − | − | − |
Growth on (TSAa 6.5% NaCl) | − | nd | − |
Growth at 42 °C | − | nd | − |
Growth at 37 °C | nd | nd | + |
Pyrrolidonyl arylamidase | nd | + | − |
Voges–Proskauer test | nd | − | − |
Hippurate hydrolysis | nd | − | − |
Esculin hydrolysis | + | + | + |
α-Galactosidase | − | − | − |
β-Glucuronidase | − | + | − |
β-Galactosidase | + | − | − |
Alkaline phosphatase | nd | + | + |
Leucine aminopeptidase | nd | + | + |
Arginine dihydrolase | nd | + | − |
Acid from amidon | nd | + | + |
Acid from arabinose | nd | − | − |
Acid from galactose | + | nd | + |
Acid from glycogen | nd | + | + |
Acid from inulin | nd | − | − |
Acid from lactose | nd | − | − |
Acid from mannitol | nd | + | + |
Acid from raffinose | − | − | − |
Acid from ribose | nd | + | − |
Acid from sorbitol | nd | − | − |
Acid from sucrose | + | nd | + |
Acid from trehalose | nd | + | + |
Arginine decarboxylation | nd | + | + |
Esculin degradation | nd | + | − |
Indole production | nd | − | − |
Urease | nd | − | − |