1887

Abstract

SUMMARY: By the use of six phages, 294 (94%) of 306 strains of were classified into eleven types. The remaining twelve strains were insusceptible to all phages. Unfortunately, for the purposes of distinguishing strains of epidemiological interest, 66.9% of the strains belonged to the same type. Acquired phage resistance was responsible for many of the strains being regarded as different phage types.

The phages were also active on , and on a small proportion of strains tested. They were not active on . Three phages possessed a different range of lytic activity despite the fact that Bail's cross-resistance tests suggested that they were identical.

The ability to type a species of satisfactorily by means of anti-O phages appears to depend mainly on a large proportion of the strains having acquired resistance to different phages.

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/content/journal/micro/10.1099/00221287-5-5-919
1951-12-01
2019-09-24
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