TABLE 1.
Principles of the chromogenic plates evaluated in this study for detection and presumptive identification of Salmonella species and colony colors of Salmonella and other Enterobacteriaceae
| Medium (manufacturer) | Explanation of colony colors (enzyme detected [substrate used]) | References |
|---|---|---|
| ABC (Lab M. Ltd.) | Salmonella yield blue colonies (α-galactosidase [5-bromo-4-chloro-3-indolyl-α-d-galactopyranoside]); other Enterobacteriaceae yield black colonies (β-d-galactosidase [3,4-cyclohexeno esculetin-β-d-galactoside]). | 19, 23, 24 |
| COMPASS Salmonella agar (Biokar Diagnostics) | Salmonella yield magenta colonies (esterase [5-bromo-6-chloro-3-indolyl-caprylate]); other Enterobacteriaceae yield blue colonies (β-glucosidase [5-bromo-4-chloro-3-indolyl-glucopyranoside]). | 22, Roure et al.a |
| CHROMagar Salmonella agar (CHROMagar Microbiology) | Salmonella yield mauve colonies (esterase [patented substrate]); other Enterobacteriaceae yield blue or white colonies (β-d-galactosidase [patented substrate]). | 6, 10, 15 |
| SM ID agar (bioMerieux) | Salmonella yield pink colonies (d-glucuronic acid metabolization [neutral red acidification]); other Enterobacteriaceae yield blue or green colonies (β-d-galactosidase [5-bromo-4-chloro-3-indolyl-β-d-galactopyranoside]). | 5, 17, 28 |
a
101st Gen. Meet. Am. Soc. Microbiol.