MICROCOCCUS INTRACELLULARIS MENINGITIDIS 379 



large numbers, both in this and foreign countries and the value of the 

 serum as a therapeutic agent seems firmly established. 



Hiss and Zinsser ^ have treated a number of meningitis patients with 

 subcutaneous injections of leucocyte extracts and believe that they have 

 favorably influenced the course of the disease. 



Pseudomeningococcus. — Elser and Huntoon ^ have described a diplo- 

 coccus very similar to the meningococcus which they differentiated 

 from it only by serum reactions. This diplococcus could be identified 

 only by agglutinin absorption tests. They named it pseudomeningo- 

 coccus. 



1 Hiss and Zinsser, Jour. Med. Res., Nov., 1908. 

 ^ Elser and Huntoon, Jour. Med. Res., xxi, 1909. 



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