TABLE 2.

Differentiation of Klebsiella and Raoultella species obtained from human clinical specimens according to results of the present study and references 13, 23, and 32

Bacterial speciesaTest resultb
IndoleGrowth at 10°CHistamined-melezitoseOrnithine
K. pneumoniae/K. variicola
K. oxytoca+++/−
R. planticola+/−++
R. terrigena+++
R. ornithinolytica+++
  • a K. granulomatis and K. singaporensis are not included because isolates of these species cannot be cultured on conventional media (8) or are not obtained from human clinical specimens (25).

  • b −, negative reaction; +, positive reaction; +/−, either positive or negative reaction.