Table 1.

Comparison of biochemical markers which differentiate E. ruysiae sp. nov. from other Escherichia species

Data for E. albertii, E. coli, E. fergusonii and E. marmotae summarised from literature [2–5, 26]. + and – indicate that ≥85 % of tested strains is positive or negative for that biochemical marker, respectively.

	E. ruysiae	E. albertii	E. coli	E. fergusonii	E. hermannii	E. marmotae
ONPG	+	+	+	+	+	−
Lysine decarboxylase	−	+	+	+	−	+
Ornithine decarboxylase	+	+	+*	+	+	−
Fermentation of:
Adonitol	−	−	−	+	−	−
d-Xylose	−	−	+	+	+	+
Cellobiose	−	−	−	+	+	−
d-Sorbitol	+	−	+	−	−	+

*50–85 % of E. coli possess this biochemical property.