TABLE 2.

Color of colonies on CHR medium in the DipStreak device and on US3 medium plates in study A

OrganismNo. of isolates (total, 574)Dipstreak device with CHR mediumUS3 medium plates
No. (%) of isolates with described colorDescription of pigment and/or morphology of coloniesNo. (%) of isolates with described colorDescription of pigment and/or morphology of colonies
Candida spp.1010 (100)White, creamy, convex10 (100)White, creamy, convex
Citrobacter spp.98 (88.9)Metallic blue with or without pink halo9 (100)Light green
1 (11.1)Colorless
Escherichia coli269258 (96.3)Pink to red247 (91.8)Pink to red
10 (3.7)Colorless to beige22 (8.2)Colorless to beige
Enterobacter spp.66 (100)Metallic blue with or without pink halo6 (100)Light green
Enterococcus spp.9594 (98.9)Blue to turquoise, small93 (98.9)Blue to turquoise, small
1 (1.1)Light blue1 (1.1)Light blue
Klebsiella spp.5353 (100)Metallic blue with or without pink halo48 (92.3)Light green
4 (7.7)Blue
Proteus mirabilis4848 (100)Colorless to beige with brown halo45 (93.8)Orange to brown with brown halo
3 (6.2)Colorless to beige
Proteus, indole positive1413 (92.8)Colorless to beige with brown halo9 (64.3)Orange to brown with brown halo
1 (1.6)Blue-green with brown halo2 (14.3)Colorless to beige
3 (21.4)Light green
Pseudomonas spp.3026 (89.7)Transparent, yellow to green, serrated edge, diffuse27 (90)Transparent, yellow to green, serrated edge, diffuse
3 (10.3)Beige3 (10)Beige
Serratia marcescens44 (100)Blue-green4 (100)Light green
Staphylococcus aureus1212 (100)Golden opaque, white, pink12 (100)White to beige
Staphylococcus saprophyticus22 (100)Pink opaque2 (100)White
Staphylococcus spp.1010 (100)White to pink10 (100)White to pink
Streptococcus agalactiae126 (50)Light blue, pinpoint6 (50)Light blue, pinpoint
3 (25)Blue6 (50)Colorless to white
3 (25)Colorless to white