Table 1.

Levels of bacteriophages recovered in urban sewage from the Barcelona area using different B. fragilishost strains

No. of strainsRange of PFU/mlaRatio of range of PFUs to numbers of bacteriophages detected by strain HSP40b
490 NCc
490–10<0.5
1410–1000.5–2.0
3>100>2.0
  • a Average value of at least two tests performed in duplicate.

  • b Phages infecting B. fragilisHSP40 were enumerated in all samples.

  • c NC, not calculable.