SHIGELLA-SONNEI COLICINE-TYPE AND PHAGE-TYPE IN EAST BOHEMIA REGION

  • 1 January 1978
    • journal article
    • research article
    • Vol. 240  (2) , 184-190
Abstract
From Nov. 1972 to the end of 1975, S. sonnei types implicated in dysentery morbidity in a number of districts of East Bohemia region [Czechoslovakia] were studied; 301 strains subjected to phage and colicin typing were classified into 45 combined types. During the study 5 types prevailed in succession, each for a protracted period of time. Four of these types retained, in the great majority of cases, their original high drug sensitivity throughout the period of their prevalence. Other types were only encountered transiently and sporadically. As a result of a phage restrictive effect of newly acquired plasmids there occurred, in rare instances in some strains, a change in phage type; or the colicin type changed while the phage type was retained as a result of another col factor having been acquired by the strain. The changes occurred in the course of epidemics.

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