[Combined use of microbiological methods for the intraspecific differentiation of Shigella sonnei. II. The role of S. sonnei strains belonging to unclassifiable phagotypes in the etiology of dysentery in the People's Republic of Bulgaria].

The phage typing of S. sonnei strains in Bulgaria during 1973-1983 revealed that 10.07% of these strains could not be classified with the known phage types in accordance with the international scheme of Hammarstrom-Kallings. They were found to belong to so-called nonclassifiable (n.c.) phage types. Among 68 detected n.c. phage types only 24 (35.29%) were… (More)