Meningococcus meningitis / by Henry Heiman ... and Samuel Feldstein ... with introduction by Henry Koplik ... with 4 plates, 31 figures, 2 in color, and 4 charts.

  • Heiman, Henry, 1865-
Date:
[1913], [©1913]
Catalogue details

Licence: Public Domain Mark

Credit: Meningococcus meningitis / by Henry Heiman ... and Samuel Feldstein ... with introduction by Henry Koplik ... with 4 plates, 31 figures, 2 in color, and 4 charts. Source: Wellcome Collection.

Provider: This material has been provided by the Augustus C. Long Health Sciences Library at Columbia University and Columbia University Libraries/Information Services, through the Medical Heritage Library. The original may be consulted at the the Augustus C. Long Health Sciences Library at Columbia University and Columbia University.

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    Jaeger and his followers, and completely established the constancy of those characteristics of the organism originally described by Weichselbaum. An explana- tion for the strange results obtained by the Jaeger school was found in the difficulties surrounding the growth of the meningococcus on artificial media and the ease with which other organisms that grow under less exacting conditions contaminate the media em- ployed for its cultivation. In animal experiments the ready invasion of more resistant secondary micro- organisms was another frequent source of error. By his studies of the morphological, cultural, fermenta- tive, and agglutinating properties of the two diplo- cocci, v. Lingelsheim has shown that they can not be considered to belong to the same species. To avoid confusion in the future, he prefers to call the Jaeger coccus, diplococcus crassus. The following account of the bacteriologic fea- tures of the meningococcus is based in part on the admirable paper of Elser and Huntoon. Staining.—All the ordinary aniline dyes stain the meningococcus with great ease. It is now well estab- lished that the meningococcus is invariably Gram- negative, i.e., it takes the counterstain. This staining characteristic of the meningococcus is of great diag- nostic importance, as it offers a quick and reliable method of identification of this organism in the cere-