THE CLASSIFICATION OF BACTERIA 55 



Mycobacterium Lehmann-Neumann 



I. Stain with basic aniline dyes, and easily decolorized by mineral acids when 

 stained with carbol fuchsin. 



A. Grow well on nutrient gelatin. Gelatin liquefied very slowly or merely 



softened. 



1. Stain by Gram's method. SWINE ERYSIPELAS GROUP. 



2. Not stained by Gram's method. GLANDERS GROUP. 



B, Little or no growth in ordinary nutrient gelatin. 



1. Grow well in nutrient bouillon at body temperatures. 



a. Stained by Gram's method. Rods cuneate clavate irregu- 

 larly swollen. DIPHTHERIA GROUP. 



2. No growth in nutrient bouillon or on ordinary culture media. Rods 



slender, tubercle-like. 



a. Stain by Gram's method. LEPROSY GROUP. 



b. Do not stain by Gram's method. INFLUENZA GROUP. 



3. No growth in nutrient bouillon or on ordinary culture media. Rods 



variable. ROOT-TUBERCLE GROUP. 



I. Not stained with aqueous solutions of basic aniline dyes ; not easily decol- 

 orized by acids. TUBERCLE GROUP. 



COCCACEAE 



Cells in their free condition globular, becoming slightly elongated before 

 division. Cell division in one, two, or three directions of space. 



A. Cells without flagella. 



1. Division in only one direction of space. Streptococcus Billroth, 



P- 55- 



2. Division in two directions of space. Micrococcus Hallier, p. 71. 



3. Division in three directions of space. Sarcina Goodsir, p. 109. 



B. Cells with flagella. 



1. Division in two directions of space. Planococcus Migula, p. 114. 



2. Division in three directions of space. Planosarcina Migula, p. 115. 



STREPTOCOCCUS (Billroth) 



Untersuch. iiber die Vegetationsformen von Coccobacteria septica, 1874. 

 Leuconostoc, Van Tieghem : Traite de Botanique, 1883. 



Cells round to slightly elongated. In short chains of only a few elements, or 

 in long chains containing several hundred. Never in threes, tetrads, or 

 irregular clusters. Division in only one direction of space. Non-motile. 

 Single chains or cocci may be surrounded by a capsule. 



