Table 2.
Effect of capsule expression on phage-mediated lysis of B. anthracis
| B. anthracis strain | Culture medium | Zone of lysis or growth inhibitiona mediated by phage: |
|||
|---|---|---|---|---|---|
| γ | Fah | F7 | F9 | ||
| Ames | Blood agar | +++ | +++ | ++ | +++ |
| NBY agar + CO2 | − | − | − | − | |
| Vollum | Blood agar | +++ | ++ | ++ | +++ |
| NBY agar + CO2 | − | − | − | − | |
| Sterneb | Blood agar | +++ | +++ | +++ | +++ |
| NBY agar + CO2 | +++ | ++ | +++ | +++ | |
a
+++, zone of lysis or inhibition 1 cm in diameter; ++, zone of lysis or inhibition 1 cm in diameter with some regrowth; −, no zone of lysis or inhibition.
b
B. anthracis Sterne lacks capsule genes.