Table 2. Differential characteristics of Bacteroides species [57–67]†.
From: Genome sequence and description of Bacteroides timonensis sp. nov.
Properties | B. timonensis | B. cellulosyticus | B. intestinalis | B. fragilis | B. vulgatus | B. thetaiotaomicron | B. salanitronis | B. helcogenes | B. finegoldii | B. uniformis |
|---|---|---|---|---|---|---|---|---|---|---|
Cell diameter (µm) | 0.88 | 2–5 | 1–3 | 1.3 | 0.5–0.8 | 0.7–2 | 2–3 | 1–2 | 1–2 | 0.5–2 |
Oxygen requirement | anaerobic | anaerobic | anaerobic | anaerobic | anaerobic | anaerobic | anaerobic | anaerobic | anaerobic | anaerobic |
Gram stain | − | − | − | − | + | − | − | − | − | − |
Salt requirement | + | + | + | + | na | na | na | na | + | + |
Motility | − | − | − | − | − | − | − | − | − | − |
Endospore formation | − | − | − | + | na | − | − | − | − | − |
Indole | + | + | + | − | − | + | − | − | − | + |
Production of | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
Alkaline phosphatase | + | + | + | Na | + | + | + | na | + | na |
Catalase | + | − | + | + | na | + | − | − | na | − |
Oxidase | − | + | na | + | na | na | na | na | na | na |
Nitrate reductase | + | na | − | na | − | + | − | − | − | − |
Urease | − | na | − | na | na | − | na | − | − | na |
β-galactosidase | + | − | + | na | − | + | + | + | + | + |
N-acetyl-glucosamine | + | + | + | na | na | + | na | na | + | + |
Acid from | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
L-Arabinose | − | w | + | − | − | + | + | − | − | + |
Ribose | − | + | na | − | + | na | na | − | na | na |
Mannose | − | + | + | + | + | + | + | + | + | + |
Mannitol | − | − | − | − | − | − | − | − | − | − |
Sucrose | − | + | + | + | + | + | + | + | + | + |
D-glucose | − | + | + | + | + | + | + | + | + | + |
D-fructose | − | + | + | + | + | + |  | + | na | na |
D-maltose | − | + | + | + | + | + | + | + | + | + |
D-lactose | − | w | + | + | + | + | + | + | + | + |
Habitat | human gut | human gut | human gut | human gut | human gut | human gut | human gut | pig gut | human gut | human gut |