78 PHARMACEUTICAL BACTERIOLOGY. 



It is advised that the pharmacist refrain from experimenting with patho- 

 genic organisms, excepting in so far as he may act in cooperation with the 

 physician. When experimenting with pathogenic organisms the greatest 

 caution is necessary to guard against autoinoculation and the spreading of 

 disease. It should be made a rule to treat every microbe studied as though 

 it were virulently pathogenic, capable of spreading an epidemic. Never 

 expose a colony (plate culture, tube culture, etc.) in such a way as to permit 

 the escape of the organisms into the air. Pour a disinfecting solution (5 

 per cent, carbolic acid) into cultures that are to be discontinued and then 

 boil container and all, for thirty minutes, before washing and cleaning the 

 glassware. Never -forget to sterilize the platinum needle before and after 

 making an inoculation or a culture transfer. 



DESCRIPTIVE CHART SOCIETY OF AMERICAN BACTERIOLOGISTS. 1 



GLOSSARY OF TERMS. 



Agar Hanging Block, a small block of nutrient agar cut from a poured plate, and placed 

 on a cover-glass, the surface next the glass having been first touched with a loop from 

 a young fluid culture or with a dilution from the same. It is examined upside down, 

 the same as a hanging rock. 



Ameboid, assuming various shapes like an ameba. 



Amorphous, without visible differentiation in structure. 



Arborescent, a branched, tree-like growth. 



Beaded, in stab or stroke, disjointed or semi-confluent colonies along the line of inoculation. 



Brief, a few days, a week. 



Brittle, growth dry, friable under the platinum needle. . 



Bullate, growth rising in convex prominences, like a blistered surface. 



Butyrous, growth of a butter-like consistency. 



Chains, short chains, composed of 2 to 8 elements. Long chains, composed of more than 

 8 elements. 



Ciliate, having fine hair-like extensions, like cilia. 



Cloudy, said of fluid cultures which do not contain pseudozooglea. 



Coagulation, the separation of casein from whey in milk. This may take place quickly 

 or slowly, and as the result either of the formation of an acid or of a lab ferment. 



Contoured, an irregular, smoothly, undulating surface, like that of a relief map. 



Convex, surface the segment of a circle, but flattened. 



Coprophyl, dung bacteria. 



Coriaceous, growth tough, leathery, not yielding to the platinum needle. 



Crater if orm, round, depressed, due to the liquefaction of the medium. 



Cretaceous, growth opaque and white, chalky. 



Curled, composed of parallel chains in wavy strands, as in anthrax colonies. 



Diastasic Action, same as Diastatic, conversion of starch into water-soluble substances by 

 diastase. 



Prepared by F. D. Chester, F. P. Gorham, Erwin F. Smith, Committee on 

 Methods of Identification of Bacterial Species. Endorsed by the Society for general use 

 at the annual meeting, January, 1908. 



