[Dynamics of dysenteric diseases, caused by Sh. sonnei of different enzymatic and conditional colicinogenotypes, in Kharkov in 1965-1972].

Results of studying the enzymatic (by maltose, rhamnose and xylose) properties of 9277 freshly-located Sh. sonnei strains isolated in Kharkov in 1965-1972 showed that they were referred to 14 enzymatic types (a, b, c, d, e, f, g, k, l, m, n, o, p, q). The strains under study were additionally--within the range of each of the enzymatic type-divided into 8 conditioned coli phi,cinogen types (I-VIII) by their sensitivity to colicines of the indicator E. coli, K12 and B cultures. Subdivision of the strains with the use of the two mentioned tests permitted to establish the prevalence among the Sh. sonnei strains isolated during the individual years of definite conditioned enzymatic-colicinogenic types. During the period observed group diseases were caused by Sh. sonnei of only some of the enzymatic-colicinogenic types-aII, aVI, dI, dII, dVI, etc. Three enzymatic types of Sh. sonnei-a, d and k-dominated in Kharkov beginning from 1969.