Table 9.

Differentiation of Morganella morganiisubspecies and biogroupsa

Test% of hybridized strains positive at 48 h forb:
M. morganiisubsp. morganii biogroupM. morganii subsp. sibonii biogroup
AcBdCDEFG
Indole production1001001001001007556
Methyl red100951001001007589
Voges-Proskauer0000000
Citrate, Simmons'0000000
Hydrogen sulfide (on TSIeagar)0152500022
Urea, Christensen10096100100100100100
Phenylalanine deaminase10096100100100100100
Lysine decarboxylase01000100100750
Arginine dihydrolase0000000
Ornithine decarboxylase1008000100089
Motility (36°C)005001007589
Gelatin hydrolysis (22°C)0000000
Growth in KCN1008010010010010067
Malonate utilization0500000
d-Glucose
 Acid production10010010010010010089
 Gas production100881001001007578
Acid production from:
d-Adonitol0000000
l-Arabinose0000000
d-Arabitol0000000
 Cellobiose0000000
 Dulcitol0000000
 Erythritol0000000
 Glycerol5010050100000
i(myo)-Inositol0000000
 Lactose0000000
 Maltose0000000
d-Mannitol0000000
d-Mannose1009210010010010089
 Melibiose0000000
 α-Methyl-d-glucoside0000000
 Raffinose0000000
l-Rhamnose0000000
 Salicin0000000
d-Sorbitol0000000
 Sucrose00000011
 Rehalose0000100100100
d-Xylose0000000
Mucate, acid production0000000
Tartrate, Jordan's5096100100100100100
Esculin hydrolysis0000000
Acetate utilization0000000
Lipase (corn oil)0000000
DNase (25°C)0000000
NO3→NO21008410033100100100
ONPGf50157533000
Tyrosine clearing1008910010010010088
  • a Modified from reference50.

  • b Key reactions for the differentiation of subspecies and biogroups are shown in bold.

  • c Includes type strain ATCC 25380.

  • d Formerly biogroup 1.

  • e TSI, triple sugar iron.

  • f δ-Nitrophenyl-d-galactopyranoside.