TABLE 4.
Distribution of non-Salmonella genera yielding Salmonella-like colonies on different media before and after enrichment and after 48 h incubationa
| Species | No. of strains detected before and after enrichment and incubation for 48 h
|
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| ABC medium
|
COMPASS agar
|
CHROMagar-Salmonella agar
|
SM ID agar
|
Hektoen agar
|
||||||
| BE | AE | BE | AE | BE | AE | BE | AE | BE | AE | |
| Pseudomonas spp. | 7 | 7 | 15 | 37 | 30 | 57 | 16 | 26 | 45 | 63 |
| Yeasts | 0 | 0 | 60 | 38 | 67 | 51 | 13 | 5 | 2 | 1 |
| Nonfermenting bacilli | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 0 |
| Citrobacter spp. | 0 | 1 | 0 | 0 | 0 | 1 | 6 | 12 | 29 | 45 |
| Klebsiella, Enterobacter, and Serratia | 3 | 2 | 0 | 3 | 0 | 3 | 8 | 3 | 12 | 17 |
| E. coli | 1 | 0 | 13 | 8 | 4 | 2 | 13 | 6 | 19 | 8 |
| Proteae | 0 | 3 | 11 | 11 | 10 | 13 | 19 | 19 | 46 | 77 |
| Unidentified bacilli | 0 | 4 | 9 | 11 | 1 | 3 | 5 | 12 | 4 | 4 |
| Shigella spp. | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Total no. of false-positive isolates after 48 h of incubation | 11 | 17 | 109 | 108 | 112 | 130 | 80 | 83 | 159 | 215 |
a
Abbreviations: BE, before enrichment; AE, after enrichment in selenite broth.