Studies in atypical Streptococcus equi.
An atypical variety of Streptococcus equi is described. It was shown to be deficient in capsular material, to be very virulent for mice and to possess a cell-wall protein similar to the M-like protein of classical Str equi. Antiserum prepared against classical Str equi effectively opsonised the atypical strains, and induced the formation of long chains by these atypical strains. It is possible that this variant of Str equi can be used to overcome many of the current problems associated with the manufacture and use of strangles vaccines.
D000818:Animals; D000937:Antigen-Antibody Reactions; D000942:Antigens, Bacterial / Q000302:isolation & purification; D002473:Cell Wall / Q000276:immunology; D006736:Horses / Q000382:microbiology; D051379:Mice; D010587:Phagocytosis; D013291:Streptococcus / Q000254:growth & development / Q000276:immunology; D014774:Virulence
D000942:Antigens, Bacterial