An association between capsulation and phage sensitivity in Erwinia amylovora.

摘要: DURING a recent outbreak of fire blight in Britain1,2 more than 150 isolations the pathogen, Erwinia amylovora, have been made this laboratory. On initial plating infected material two types colony are often observed3. The dominant type has characteristic markings on ‘Yeastrel’ peptone agar plates incubated at 30° C. For convenience, strains which form called ‘typical’; those forming second colony, is relatively featureless, and less opaque, ‘atypical’. Some intermediate character, even after re-streaking several times. With some such opacity individual colonies single streak plate may show considerable variation, with others, each appears mottled; marking or not be apparent opaque colonies. ‘typical’ regularly yield small proportion unmarked