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MANUAL OF DETERMINATIVE BACTERIOLOGY 



2. Chromogeuesis best seen on Loffler's serum, 

 a. Acid from fructose, 

 b. Acid from sucrose. 



5. Neisseria perflava. 

 bb. No acid from sucrose. 



6. Neisseria flava. 

 aa. No acid from fructose. 



b. Acid from glucose. 



7. Neisseria subflava. 

 bb. No acid from glucose. 



8. Neisseria flavescens. 

 II. Anaerobes. 



A. Gas produced from peptone broth. 



9. Neisseria discoides. 



B. No gas produced. 



1. Odor of rancid butter. 



10. Neisseria reniformis . 



2. No rancid odor. 



11. Neisseria orbiculata. 



1. Neisseria gonorrhoeae Trevisan. 

 (Micrococcus der Gonorrhoe, Neisser, 

 Vorl. Mitteil., Cent. f. Medicinische 

 Wissenschaft, 17, 1879, 497; Trevisan, 

 Atti della Accademia Fisio-Medico-Sta- 

 tistica in Milano, Ser. 4, 3, 1885, 105.) 

 From Greelc, gonorrhoea, flux of semen; 

 M.L. genitive of gonorrlioea. 



Synonyms: Gonococcus, Diplococcus 

 der Gonorrhoe, Bumm, Der Mikroorgan- 

 ismen der gonorrhoisclien Sclileimhauter- 

 krankung, Weisbaden, 1885, 16; Merismo- 

 pedia gonorrhoeae Zopf, Die Spaltpilze, 

 1885, 54 ; Micrococcus gonorrhoeae Fliigge, 

 Die Mikroorganismen, 1886, 156; Micro- 

 coccus gonococcus Schroeter, in Cohn, 

 Kryptog. Flora v. Schlesien, S, I, 1886, 

 147 ; Diplococcus gonorrhoeae Lehmann 

 and Neumann, Bakt. Diag., 1 Aufl., 2, 

 1896, 150; Micrococcus gonorrhoeae Leh- 

 mann and Neumann, ibid., 4 Aufl., 2, 

 1907, 212. 



Spheres: 0.6 to 1.0 micron, occurring 

 singly and in pairs, the sides flattened 

 where they are in contact. Gram- 

 negative. 



Grows only on media with the addition 

 of body fluids (blood, ascites, etc.), or 

 other specially prepared media. 



Colonies are small, transparent, even- 



tually (2 to 4 days) developing a lobate 

 margin, grayish-white with a pearly opal- 

 escence by transmitted light. Larger 

 colonies on special media. 



Acid from glucose. No acid from 

 maltose, fructose, sucrose and mannitol. 



Optimum temperature 37°C. No 

 growth below 25° or above 40°C. 



Aerobic to facultative anaerobic. 

 Many strains develop more readily with 

 increased CO2 tension. 



Common name : Gonococcus. 



Source: Originally found in purulent 

 venereal discharges. Also found in 

 blood, conjunctiva, joints and cerebro- 

 spinal fluid. 



Habitat: The cause of gonorrhoea and 

 other infections of man. Not found in 

 other animals. 



2. Neisseria meningitidis (Albrecht 

 and Ghon) Holland. (Diplokokkus intra- 

 cellularis meningitidis Weichselbaum. 

 Fortschr. d. Med., 5, 1887, 583 ; Neisseria 

 weichselbaumii Trevisan, I generi e le 

 specie delle Batteriacee, 1889, 32; not 

 Diplococcus intracellularis Jaeger , Ztschr. 

 f. Hyg., 19, 1895, 353; not Tetracoccus 

 intracellularis Jaeger, ibid., 368; not 

 Streptococcus intracellularis Lehmann 



