(Proceedings 5th International Congress for Microbiology, Rio de Janeiro, Brasil, 1950, Internat. Bull. Bact. Nomen. and Taxon., 4, 1954, 95) that these groups be designated as A, B, C and D. Relationships of these groups to older classifications of the meningococcus are shown in the accom- panying table. Aerobic, facultatively anaerobic. Source: Nasopharynx, saliva and respira- tory tract. Habitat: Human mucous membrane of the respiratory tract. Often associated with other organisms in inflammations of the mucous membrane. Relationships Among the Various Classifications OF Meningococci. Dopter and Pauron,* 1914 Gordon and Murray,* 1915 Griffith; Scott,* 1916 Nicolle, Debains and Jouan,* 1918 Evans (Tro- pin Groups),* 1920 Common use, 1940 Recommended by Committee,* 1950 Meningococcus I III I A R I A Para-meningo- coccus II II B S II B IV z IV D C II alpha C D**
- Dopter and Pauron, Compt. rend. Soc. Biol., Paris, Tt , 1914, 231; Gordon and Murraj',
Jour. Roy. Army Med. Corps, 25, 1915, 411; Griffith, Local Govt. Bd. Rept., New Series, No. 110, 1916, 41; Scott, ihid., 56; Nicolle, Debains and Jouan, Ann. Inst. Past., ^2, 1918, 150; Evans, U. S. Pub. Health Ser., Hyg. Lab. Bull. 124, 1920, 43; Sub-Committee on A^ets- sena of the Internat. Comm. on Bact. Nomenclature, Proceedings, 5° Congresso Inter- nacional de Microbiologia, Rio de Janeiro, 1950 (in press) .
- Relation of this D to other groups is unknown.
3. Neisseria catarrhalis (Frosch and Kolle, 1896) Holland, 1920. {Micrococcus catarrhalis Frosch and Kolle, in Fliigge, Die Mikroorganismen, 3 Aufl., 2, 1896, 154; Holland, Jour. Bact., 5, 1920, 224.) ca.tar.rhal'is. Gr. adj. catarrhus down- flowing, catarrh; M.L. adj. catarrhalis of catarrh. Spheres 0.6 to 1.0 micron in diameter as a rule. Occur singly, in pairs with adjacent sides flattened and sometimes in fours. Gram-negative. Blood agar colonies: Small, circular, rather convex, grayish white to dirty white, sometimes erose. Broth : Turbid, often with a slight pellicle. No acid from any of the carbohydrates. Optimum temperature, 37° C. Grows well at 22° C. 4. Neisseria sicca (von Lingelsheim, 1908) Bergey et al., 1923. (Diplococcus pharyngis siccus von Lingelsheim, Klin. Jahrb., 15, 1906, 409; Diplococcus siccus von Lingelsheim, Ztschr. f. Hyg., 59, 1908, 476; Bergey et al.. Manual, 1st ed., 1923, 43.) sic'ca. L. adj. siccus dry. Spheres, 0.6 to 1.0 micron in diameter, occurring singly and in pairs with adjacent sides flattened. Gram-negative. Blood agar colonies: Grayish, somewhat dry, crumbling when an effort is made to remove them. Often the whole colony can be pushed about over the medium. Some- times corrugated on the surface and firmly adherent to the medium. Sometimes hemo- lytic. Often difficult to emulsify; precipitates spontaneously in normal salt solution.
