Table 1

Comparison of colony colour by organism type and media

		Oxoid UTI medium								Bio-Merieux CPS ID2							BBL CHROMagar								LabM Harlequin CLED
Organism	Total	B/P	Br	C	G	P	T	W	Y	Br	C	G	P	T	W	Y	B/P	B	C	G	P	T	W	Y	Bl	Br	C/D	C	G	Gy	P	T	W
Bl, black; B/P, blue/purple; Br, brown; C, cream/colourless; C/D, cream with a dark centre; Coag neg, coagulase negative; G, green; Gy, grey; P, pink; T, turquoise; W, white; Y, yellow.
Acinetobacter baumanii	2							2			1				1								2					2
β Haemolytic strep group B	10						10						3	6	1							10						5				2	3
Citrobacter spp	18	4				11	3				15	2	1				18								6		5	1	1	5
Coag neg staphylococcus	4					3		1			1		1		2				1		3							1	1				2
Enterobacter spp	19	19											1	18			19								18				1
Enteroccocus faecalis	18						18							18								18			18
Escherichia coli	531			8		523					22		509						6		525				3		38	18	414	50		8
Hafnia alvei	1					1					1										1							1
Klebsiella spp	59	59												59			59								59
Morganella morganii	8		8							8								8								7		1
Proteus mirabilis	56		56							56								56								53		3
Proteus spp	3		3							3								3								3					1
Providencia stuartii	2		2							2								2								2
Pseudomonas aeruginosa	24			1	23						13	10	1						3	21						21		2	1
Serratia spp	7	1					6							7			1					6			4				1	2
Staphylococcus aureus	10			1		1			8		3				2	5						1	1	8				8					2
Staphylococcus aprophyticus	5					3			2		1				2	2			1		3			1				3					2
Yeast	10			5				5			5				5				5				5										10
Total	787	83	69	15	23	542	37	8	10	69	62	12	516	108	13	7	97	69	16	21	532	35	8	9	108	85	43	45	419	57	1	10	19