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. 1999 Apr;65(4):1772–1776. doi: 10.1128/aem.65.4.1772-1776.1999

TABLE 1.

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
a

Average value of at least two tests performed in duplicate. 

b

Phages infecting B. fragilis HSP40 were enumerated in all samples. 

c

NC, not calculable.