Essentials of bacteriology; being a concise and systematic introduction to the study of bacteria and allied microörganisms . Themeningococcus is very sirmlar, but is easily cultivated and isnot apt to be foimd in the same secretions as the gonococcus. Micrococcus citreus, albicans, and subflavus, described byBumm, are all Gram positive and grow readily on gelatin andagar. The gonococcus is distinguished from all these similar micro-cocci by the tests enumerated above. These characteristics, taken in toto, form sufficient featuresfor its ready recognition, and as it is often a serious question
Essentials of bacteriology; being a concise and systematic introduction to the study of bacteria and allied microörganisms . Themeningococcus is very sirmlar, but is easily cultivated and isnot apt to be foimd in the same secretions as the gonococcus. Micrococcus citreus, albicans, and subflavus, described byBumm, are all Gram positive and grow readily on gelatin andagar. The gonococcus is distinguished from all these similar micro-cocci by the tests enumerated above. These characteristics, taken in toto, form sufficient featuresfor its ready recognition, and as it is often a serious question todecide, not so much because of the patients health as becauseof his character, we should be very careful not to pronounce a GONOCOCCDS.—MENINGOCOCCUS 177 verdict until we have tested the micro-organism as the germ is found which answers to the above descrip-tion, the process can be called gonorrhea without a doubt. Diplococcus Intracellularis Meningitidis (Weichsel-baum).—Synonyms.—Meningococcus; Micrococcus Meningi-tidis. Origin.—Found by Weichselbaum in epidemic cerebrospinalmeningitis in Fig. 87.—Diplococcus intracellularis meningitidis in preparation from peritoneal exudate in a guinea-pig (X2000)(Wright and Brown). Form.—A small coccus occurring in pairs, flattened againsteach other, and contained within the leukocytes, resemblinggonococcus. No capsule (Fig. 87). Properties.—Ferments sugars, with acid production. Growth.—Best on blood-agar, sertim-agar, and ascitic glu-cose-agar at body temperature; good growth in twenty-fourhours. Sheep serum better mediimi. 178 ESSENTIALS OF BACTERIOLOGY Colonies.—Circular discs, whitisli, almost transparent, mar-gins, smootli. Stain.—^With basic anilin. Gram negative. Jennersblood-stain and Neisser stain best for spinal fluid alkaUne methylene-blue a good stain. Resistance.—Organisms very perishable one to three destroyed by a self-elab
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