BACTERIUM MALLEI 



447 



have but little weight when compared with the behavior 

 of the organism when subjected to more conclusive tests. 

 For example, it does not, at any stage of development, resist 

 exposure to 3 per cent, carbolic acid solution for longer than 

 five minutes, nor to 1 : 6000 sublimate solution for more than 

 two minutes. It is destroyed in ten minutes in some experi- 

 ments, and in five in others, by a temperature of 55° C; 



Fig. 80 



Bacterium mallei, from culture. 



and when dried it loses its vitality, according to different 

 observers, in from thirty to forty days; all of which speak 

 directly against this being a spore-bearing bacillus. 



It is not motile, and does not therefore possess flagella. 



It grows readily on ordinary nutrient media at from 25° 

 to 38° C. 



Upon nutrient agar-agar, both with and without glycerin, 

 it appears as a moist, opaque, glazed layer, with nothing 



