1887

Abstract

Summary: A broad range of typing phages belonging to lytic groups I, II, III, IV and those classified as miscellaneous produced plaques on strain . Two variant forms of this strain were compared, and . Phages belonging to lytic group II, of both A and B serology, had low efficiencies of plating (EOP) for the variant but had high EOP values for the variant. In general, of phages from other lytic groups, those of B serology tended to plate with low EOP values on both variants, whereas those of A serology plated with high EOP values. Propagation of several of the phages on both hosts resulted in host-modifications of the phage progeny. Similar host-induced modifications were produced by propagation of the phages on 73. The host-modified phages showed striking losses in plating efficiency for their usual propagating hosts. The significance of these findings with respect to genetic classification of the phages and hosts is discussed.

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/content/journal/micro/10.1099/00221287-36-1-17
1964-07-01
2021-07-24
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