PATHOGENIC BACTERIA. 



147 



Secondly. Not stained with Gram's method. 



Thirdly. Refusing to grow readily upon gelatine. 



All the similar bacteria being easily cultivated. 



These characteristics, taken in toto, form sufficient features for 

 its ready recognition, and as it is often a serious question to 

 decide, not so much because of the patient's health as because 

 of his character, we should be very careful not to pronounce a 

 verdict until we have tested the micro-organism as above. When 

 the germ so tested is found, the process can be called specific, 

 without a doubt. 



FIG. 81. 





Bacillus of Tetanus with spores. 



Bacillus of Tetanus. (Nicolaier-Kitasato.) 



Origin. Nicolaier found this bacillus in the pus of a wound 

 in one who had died of tetanus, describing it in 1884. 



Kitasato has since then been able to isolate and cultivate this 

 germ. (1889.) 



Form. A very delicate, slender rod, somewhat longer than 

 the bacillus of mouse septic-senna, which is the smallest bacillus. 



When the spores form, a small swelling occurs at the end 

 where the spore lies, giving it a drum-stick shape. 



