The bacteria in scarlatinal and normal throats / Gustav F. Ruediger.

  • Ruediger, Gustav F.
Date:
1906
Catalogue details

Licence: In copyright

Credit: The bacteria in scarlatinal and normal throats / Gustav F. Ruediger. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    blood-agar plates contained many green colonies and the litmus inulin-agar plates contained many red colonies. Typical pneumococci were easily isolated from all plates. It will be noticed that green colonies were found in all blood-agar plates, except two sets, which were inocu- lated with material from scarlatinal throats. Only a small proportion of these colonies are pneumococci and the remainder form a large group of organisms between the typical pneumococci 'and streptococci. Some of these organisms seem to correspond to Schottmiiller’s Strepto- Fig. 1.—Photograph of a hlood-agar plate inoculated with material from a scarlet fever tonsil. Many Streptococcus pyogenes colonies (hemolysing) and few small green colonies. COCCUS viridans, but others are very closely related to the pneumococcus. The organisms of this large group have very little virulence for rabbits and seem to be normal inhabitants of the throat, especially the pharynx.® VIRULENCE OF STREPTOCOCCI AND PNEUMOCOCCI ISO- LATED FROM THROATS. Most hemolysing streptococci and some pneumococci isolated from scarlatinal and normal throats have some virulence for rabbits, but Streptococcus viridans has 8. A more detailed description of these organisms and of differ- ent strains of Streptococcus pyogenes will be given in the Journal of Infectious Diseases.