1,4-14 PURE CULTURE STUDY OF BACTERIA 



Dissociation, separation of characters, usually referring to phase variation (q. v.). 



Echinulate, a growth along line of inoculation with toothed or pointed margins. 



Edema, intercellular accumulation of fluid in a part of an animal body. 



Effuse, growth thin, veily, unusually spreading. 



Endospores, thick-walled spores formed within the bacteria; i. e., typical bacterial 



spores like those of B. anthracis or B. subtilis. 

 Endotoxin, a toxic substance produced within a microorganism and not excreted. 

 Enzyme, a chemical ferment produced by living cells. 

 Erose, irregidarly notched. 

 Excentric, slightly to one side of the center, between the positions denoted central and 



subterminal. 

 Exogenous, originating outside the organism. 

 Exotoxin, a toxic substance excreted by a microorganism and hence found outside the 



cell body. 

 Facultative anaerobe, see anaerobic. 



Filamentous, growth composed of long, irregularly placed or interwoven threads. 

 Filaments, applied to morphology of bacteria, refers to thread-like forms, generally un- 



segmented; if segmented, the orgahisms are enclosed in a sheath. 

 Filiform, in stroke or stab cultures, a uniform growth along line of inoculation. 

 Flagellum (pZ.-la), a motile, whip-like attachment; an organ of locomotion. 

 Flaky, refers to sediment in the form of numerous separate flakes. 

 Flocculent, containing small adherent masses of various shapes floating in the fluid. 

 Fluorescent, having one color by transmitted light and another by reflected light. 

 Gonidia, asexual spores. 



Gonidial, referring specifically to a bacterial phase producing gonidia-like bodies. 

 Granular, composed of small granules. 



Hemolysin, a substance causing hemolysis either alone or in presence of complement. 

 Hemolysis, a dissolving action on red blood corpuscles. 

 Hemorrhage, an escape of blood from the vessels. 

 Histolysis, breaking down of tissues. 

 Hydrolysis of starch, destruction of starch by the formation of a chemical union with 



water; includes diastatic action, but is a more general term. 

 Immune serum, an animal fluid containing an antibody. 

 Inactivate, to destroy complement by heat (at 56° for 30 minutes). 

 Infundibuliform, in form of a funnel or inverted cone. 

 Intraperotoneal, within the peritoneum. 

 Intravenous, within a vein. 



Iridescent, exhibiting changing rainbow colors in reflected light. 

 Lesion, a local injury or morbid structural change. 

 Lobate, having lobes, or rounded projections. 



Maximum temperature, temperature above which gro\%'th does not take place. 

 Membranous, growth thin, coherent, like a membrane. 

 Metabolite, a substance produced by metabolism. 



Microaerophilic, growing best in presence of small quantities of oxygen. 

 Minimum temperature, temperature below which growth does not take place. 

 Mucoid, mucus-like, referring specifically to a bacterial phase producing slimy growth. 

 Mycelioid, colonies having the radiately filamentous appearance of mold colonies. 

 Napiform, liquefaction in form of a turnip. 

 Ontogenetic, pertaining to the life history of an individual. 

 Opalescent, milky white with tints of color as in an opal. 

 Opaque, not allowing light to pass thru. 



