Table 1.

Biochemical characteristics used for identification of E. coli and Klebsiella spp.

Isolate	KIA	H2S	Indole	Motility	Citrate test
E. coli	A/A	−	+	+	−
Klebsiella spp.	A/A	−	−	−	+

KIA: Kligler's iron agar; H₂S: hydrogen sulfide; A/A: acid/acid; (−): negative reaction; (+): positive reaction.