TABLE 2.

Species and subspecies of the clinical staphylococcal isolates (n = 55) as determined by the RIDOM database

Species or subspecies tested (no. of isolates)Species or subspecies indistinguishable (no. of isolates)
S. arlettae (1)
S. aureus subsp. aureus (7)S. aureus subsp. anaerobius (7)a
S. capitis subsp. capitis (2)S. capitis subsp. urealyticus (2)b
S. caprae (2)
S. chromogenes (1)
S. cohnii subsp. cohnii (2)
S. epidermidis (10)
S. equorum subsp. equorum (2)S. equorum subsp. linens (2)c
S. felis (3)
S. haemolyticus (3)
S. hominis subsp. novobiosepticus (1)
S. hyicus (1)
S. intermedius (3)S. delphini (3)d
S. lugdunensis (2)
S. saprophyticus subsp. bovis (2)
S. schleiferi subsp. schleiferi (2)
S. sciuri subsp. sciuri (3)
S. simulans (1)
S. warneri (3)
S. xylosus (4)S. saprophyticus subsp. saprophyticus (1)e
  • a Since the isolates tested were collected from human specimens, showing a positive catalase reaction and growing aerobically without exception, the presence of isolates of the sheep-adapted, catalase-negative, anaerobic subspecies S. aureus subsp. anaerobius could be excluded.

  • b Since isolates tested showed negative urease activity and were unable to produce acid aerobically from maltose, the presence of S. capitis subsp. urealyticus isolates is improbable.

  • c Since isolates tested produced acid aerobically from maltose, d-lactose, d-trehalose, and d-ribose, the presence of S. equorum subsp. linens isolates is improbable.

  • d Since isolates tested were collected from human and canine specimens, the presence of isolates of the strictly dolphin-adapted subspecies S. delphini is most improbable.

  • e One isolate (M55), which gave the same similarity (99.35%) for S. xylosus and S. saprophyticus subsp. saprophyticus, was chemotaxonomically and by riboprinting confirmed as S. xylosus.