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Table 2

Ability of MI agar, Colilert®, Chromocult coliform® agar, and DC agar with BCIG culture-based methods to detect E. coli strains

Test methods
Strains (origin; n = 19)No. ReferenceMI agarColilert®Chromocult coliform® agarDC agar with BCIG
Escherichia coli (clinical) ATCC 11775 Fluorescent Yellow Blue Blue 
Escherichia coli (clinical) ATCC 23511 Fluorescent Yellow Blue Blue 
Escherichia coli (clinical) ATCC 35401 Fluorescent Yellow Blue Blue 
Escherichia coli (clinical) ATCC 43886 Fluorescent Yellow Blue/purple Pink 
Escherichia coli (clinical) ATCC 43890 Fluorescent Yellow Transparent Transparent 
Escherichia coli (clinical) ATCC 43894 Fluorescent Yellow Purple Pink 
Escherichia coli (clinical) ATCC 43895 Fluorescent Yellow Purple Pink 
Escherichia coli (clinical) ATCC 43896 Fluorescent Yellow Blue/purple Blue 
Escherichia coli (clinical) LSPQ 2086 Fluorescent Yellow Blue/purple Blue 
Escherichia coli (clinical) LSPQ 2092 Fluorescent Yellow Blue Purple 
Escherichia coli (clinical) LSPQ 2113 Fluorescent Transparent Grey – 
Escherichia coli (clinical) LSPQ 2115 Fluorescent Yellow Blue Blue 
Escherichia coli (clinical) LSPQ 2117 – Yellow Blue Blue 
Escherichia coli (clinical) LSPQ 2118 Fluorescent Yellow Blue/purple Pink 
Escherichia coli (clinical) LSPQ 2125 Fluorescent Yellow Blue/purple Pink 
Escherichia coli (clinical) LSPQ 2127 Fluorescent Yellow Blue/purple Pink 
Escherichia coli (clinical) LSPQ 3760 Fluorescent Yellow Blue/purple Pink 
Escherichia coli (clinical) LSPQ 3761 Fluorescent Yellow Blue/purple Pink 
Escherichia coli (clinical) LSPQ 3762 Fluorescent Yellow Blue/purple Pink 
 Total positives: 18/19 (94.7%) 18/19 (94.7%) 17/19 (89.5%) 17/19 (89.5%) 
Test methods
Strains (origin; n = 19)No. ReferenceMI agarColilert®Chromocult coliform® agarDC agar with BCIG
Escherichia coli (clinical) ATCC 11775 Fluorescent Yellow Blue Blue 
Escherichia coli (clinical) ATCC 23511 Fluorescent Yellow Blue Blue 
Escherichia coli (clinical) ATCC 35401 Fluorescent Yellow Blue Blue 
Escherichia coli (clinical) ATCC 43886 Fluorescent Yellow Blue/purple Pink 
Escherichia coli (clinical) ATCC 43890 Fluorescent Yellow Transparent Transparent 
Escherichia coli (clinical) ATCC 43894 Fluorescent Yellow Purple Pink 
Escherichia coli (clinical) ATCC 43895 Fluorescent Yellow Purple Pink 
Escherichia coli (clinical) ATCC 43896 Fluorescent Yellow Blue/purple Blue 
Escherichia coli (clinical) LSPQ 2086 Fluorescent Yellow Blue/purple Blue 
Escherichia coli (clinical) LSPQ 2092 Fluorescent Yellow Blue Purple 
Escherichia coli (clinical) LSPQ 2113 Fluorescent Transparent Grey – 
Escherichia coli (clinical) LSPQ 2115 Fluorescent Yellow Blue Blue 
Escherichia coli (clinical) LSPQ 2117 – Yellow Blue Blue 
Escherichia coli (clinical) LSPQ 2118 Fluorescent Yellow Blue/purple Pink 
Escherichia coli (clinical) LSPQ 2125 Fluorescent Yellow Blue/purple Pink 
Escherichia coli (clinical) LSPQ 2127 Fluorescent Yellow Blue/purple Pink 
Escherichia coli (clinical) LSPQ 3760 Fluorescent Yellow Blue/purple Pink 
Escherichia coli (clinical) LSPQ 3761 Fluorescent Yellow Blue/purple Pink 
Escherichia coli (clinical) LSPQ 3762 Fluorescent Yellow Blue/purple Pink 
 Total positives: 18/19 (94.7%) 18/19 (94.7%) 17/19 (89.5%) 17/19 (89.5%) 

Shading = Positive results.

‘–’: no growth.

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