MICROCOCCUS INTRACELLUDARIS MENINGITIDIS 



535 



tubes should be set up in dilutions ranging up to 1 to 50 at least, 

 in order to exclude organisms of the Mavus type. 



MICROCOCCUS PHARYNQIS Siccus. This organism described by 

 Lingelsheim 44 is a Gram-negative diplococcus often found in the 

 normal pharynx, and is recognized by its dry, creiiated colonies 

 on simple media. According to Elser and lluntoon, it sediments 

 spontaneously in salt solution and this, together with the fact that 

 the colonies are formed in a way almost impossible to break up, 

 makes it easy, according to these observers, to distinguish it from 

 the meningococcus. It is a little more difficult to distinguish from 

 M. Catarrhalis ; but can be easily separated from this organism by 

 means of the fermentation test. 



DIPLOCOCCUS CRASSUS. This is the organism that Kutscher 45 

 described as probably identical with the so-called "Jaeger" variety 

 of meningococcus. According to Kutscher and von Lingelsheim, 

 this organism has a tendency to wander from the normal pharynx 

 into the central nervous system in cases of meningitis of other 

 origin. Lingelsheim claims to have found it in the fluids of traumatic 

 meningitis and tuberculous meningitis. It has the peculiarity that 

 the cultures are said to be composed of Gram-negative and Gram- 

 positive organisms some of the cocci retaining the Gram-stain. Ac- 

 cording to Von Lingelsheim, the colonies are smaller and more 

 compact than meningococcus colonies, and it will grow at room 

 temperature. 



FERMENTATION REACTIONS OF GRAM NEGATIVE DIPLOCOCCI 



Table taken from Elser and Huntoon, loc. cit. 



44 Lingelsheim, Klin. Jahrb., 15, 1906. 



45 Kutscher, Kolle and Wassermann, Vol. 4, Second Edition, p. 603. 



