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Levels of bacteriophages recovered in urban sewage from the Barcelona area using different B. fragilis host strains
| No. of strains | Range of PFU/mla | Ratio of range of PFUs to numbers of bacteriophages detected by strain HSP40b |
|---|---|---|
| 49 | 0 | NCc |
| 49 | 0–10 | <0.5 |
| 14 | 10–100 | 0.5–2.0 |
| 3 | >100 | >2.0 |
Average value of at least two tests performed in duplicate.
Phages infecting B. fragilis HSP40 were enumerated in all samples.
NC, not calculable.
