BACILLUS PYOCYANEUS 177 



Spores are formed about the middle of the length. 

 These spores are responsible for the great resistance 

 presented by the germ. The pathogenic properties 

 are due to a soluble separable toxin. The bacteria 

 themselves do not enter the blood stream. At the 

 site of inoculation an edematous and bloody swelling 

 appears which in susceptible individuals spreads 

 rapidly. Death results from toxemia. This germ is 

 frequently responsible for spontaneous disease in the 

 lower animals, but in man is probably only introduced 

 by some mechanical injury. It has been known to be 

 introduced by hypodermic injections when a dirty 

 needle was used. Its most common method of intro- 

 duction is in grinding dirt into a wound such as a 

 compound fracture. One attack confers immunity 

 against a second. All discharges or dressings should 

 be so received that they can be burned. 



Bacillus Proteus Vulgaris. The Bacillus proteus 

 vulgaris is a widely distributed organism of pro- 

 nounced putrefactive powers. It is very similar to the 

 colon bacillus. It has been encountered in abscesses, 

 pyelonephritis, endometritis, and peritonitis. Meat 

 poisonings have been traced to it. Its toxin is very 

 poisonous. It is frequently a harmless inhabitant of 

 the intestinal tract. It is quite resistant, and to kill 

 it requires the most approved disinfectants acting 

 over a considerable time. 



Bacillus Pyocyaneus. Bacillus pyocyaneus is the 

 organism of green pus. This bacterium is widely dis- 

 tributed on the skin and mucous membranes of man 

 and animals. Its disease-producing powers are low 

 and considerable reduction of resistance on the part of 

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