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[Improvement of the preliminary classification of Corynebacterium diphtheriae v. gravis]. 1983

M D Krylova, and I I Vodoratskaia

In this study the previously published preliminary scheme for the subdivision of toxigenic and nontoxigenic Corynebacterium diphtheriae, classified with cultivar gravis, is made more precise. 3 groups remain in this scheme: I, II and III; each of them contains toxigenic C. diphtheriae (subgroup a) and nontoxigenic precursors of C. diphtheriae (subgroup b). For the first time nontoxigenic analogs of C. diphtheriae, phagovar OPQSTg, have been introduced into group I and newly discovered toxigenic C. diphtheriae, phagovar K, with their nontoxigenic precursors converted by phages 5 tox+, 6 tox+ and W tox+ have been introduced into group III. Group IV has been provisionally excluded from the scheme because this group comprises a small number of strains (3 strains). This classification can already be used in research practice for a finer differentiation of strains classified with cultivar gravis and for correct epidemic orientation.

UI MeSH Term Description Entries
D009626 Terminology as Topic Works about the terms, expressions, designations, or symbols used in a particular science, discipline, or specialized subject area. Etymology,Nomenclature as Topic,Etymologies
D003353 Corynebacterium diphtheriae A species of gram-positive, asporogenous bacteria in which three cultural types are recognized. These types (gravis, intermedius, and mitis) were originally given in accordance with the clinical severity of the cases from which the different strains were most frequently isolated. This species is the causative agent of DIPHTHERIA.
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D001434 Bacteriophage Typing A technique of bacterial typing which differentiates between bacteria or strains of bacteria by their susceptibility to one or more bacteriophages. Phage Typing,Typing, Bacteriophage,Typing, Phage
D001435 Bacteriophages Viruses whose hosts are bacterial cells. Phages,Bacteriophage,Phage

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