1950] 



GROWTH AND VARIATION OF BRUCELLA ABORTUS 



293 



5x10 



I x 10 



1x10 



4x10* 



92% ROUGH- 



ALANINE 

 ASPARAGINE 

 ASPARTIC ACID 



INITIAL INOCULUM: 



SMOOTH ORGANISMS 



ROUGH ORGANISMS 



2 4 6 8 10 12 14 16 18 20 

 DAYS 

 Figure 1. Growth (viable cell counts) of smooth and rough B. abortus in synthetic me 

 dium. 



TABLE 1 



Growth and variation of smooth B. abortus in synthetic medium 



* Averages of 6 plates. 



t Predominantly rough type. 



135 



