ROUTINE TESTS FOR THE IDENTIFICATION OF BACTERIA 



COLONIES 



149 



FORM 



i^ |i^ ^ 



PUNCTIFORM CIRCULAR FILAMENTOUS IRREGULAR RHIZOIO SPINDUB 



ELEVATION M_ .^B^ ^1^ ^^ 



H-AT RAISED CONVEX PULVINAJE UMBONATE 



TVIARGIN 



ENTIRE UNDULATE LOBATE EROSE FILAMENTOUS CURLED 



AGAR STROKE - FORM OF GROWTH 



4 1 tt 



FILIFORM ECHINULATE 



LINE OF PUNaURE 



BEADED EFFUSE ARBORESCENT RHIZOID 



GELATIN STAB 



LIQUEFACTION 



nil 



w w vL' w 



FlUFORM BEADED PAPPILLATE VILLOUS ARBORES- 

 CENT 



m\ W 



\Iy \zy v|y vS/ 



NUTRENT BROTH - SURFACE GROWTH 



FLOCCULENT 



RING 



PELLICLE UEMBRAN009 



Fig. 4. Diagram of cultural cHaracteristics. Chart distributed by Societj^ of American 



Bacteriologists. 



STUDY OF CELL MORPHOLOGY 



The routine study of morphology should include examinations of 

 stained, dried preparations and of unstained organisms in hanging drop. 

 Stained preparations to show the vegetative cells should be made, prefer- 

 ably from agar slant cultures, from a few hours to two days old, according 

 to the rapidity of growth. The medium and temperature used and the 

 age of the culture should be recorded. The examination of unstained 



