TABLE 3.
Efficiency of colony formation on BIN agar from fresh culture suspensions of different Yersinia strains
| Species and strain | Efficiency ratio (mean CFU counts ± SD)a
|
|
|---|---|---|
| BIN agar/CIN agar | BIN agar/MacConkey agar | |
| Y. pestis | ||
| Kimberley53 | 2.9 ± 0.2 | 5.9 ± 2.7 |
| EV76 | 25.0 ± 7.1 | 1.0 ± 0.3 |
| A1122 | 2.2 ± 0.5 | >1,000 |
| TRU | 0.8 ± 0.2 | >1,000 |
| Y. enterocolitica | ||
| WA | 1.4 ± 0.2 | 0.9 ± 0.1 |
| CDC 497-70 | 0.9 ± 0.1 | 1.1 ± 0.1 |
a
Aliquots (0.1 ml) from serial 10-fold dilutions ranging from 105 to 10 CFU/ml were plated. CFU counts were determined after 48 h.