A survey of colicin types and phage types ofShigella sonnei in Czechoslovakia 1976–1978

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Abstract
In the years 1976–1978 3 552 strains ofShigella sonnei obtained from the whole Czechoslovak territory by the method of colicin typing and phage typing was examined. Each strain represented always one focus. 81.3 % of the strains were colicinogenic. Twenty-one colicin types, 41 characteristic and 105 non-characteristic phage types participated in bacillary dysentery. Of the total number, 77.4 % belonged to 9 phage types (2, 3, 6, 65, 66, 67, 75, NC IV-VIII- and NC III-IV-VIII-), which are endemic in Czechoslovakia. Of the 2 889 colicinogenic strains, 85 % belonged to 3 colicin types: 2 = Ia (31 %), 6/11 = El (27 %), 12 = E6 (27 %). Some phage types produced predominantly colicin of a certain type.