304 



BACTERIOLOGY. 



charges from wounds, viz., pseudomonas seruginosa, or 

 bacillus pyocyaneus or u bacillus of green pus," or of 

 blue pus, or of blue-green pus, as it is by custom vari- 

 ously designated. Pseudomonas seruginosa is a delicate 

 rod with rounded or pointed ends. It is actively motile ; 

 does not form spores. As seen in preparations made 



FIG. 57 



FIG. 58. 



Colony of ps. seruginosa after twenty -four hours 

 on gelatin at 20-22 C. 



FIG. 59. 





Stab-culture of 

 ps. seruginosa in gel- 

 atin after twenty- 

 eight hours at 22 C. 



Colony of ps. xruginosa after forty-two hours on 

 gelatin at 20-22 C. 



from cultures, it is commonly clustered in irregular 

 masses. It does not form long filaments, there being 

 rarely more than four joined end to end, and most fre- 

 quently occurs on single cells. 



It grows readily on all artificial media, and gives to 

 some of them a bright-green color that is most conspic- 

 uous where it is in contact with the air. This green 



