8l8 MICEOBIOLOGY OF DISEASES OF MAN AND DOMESTIC ANIMALS, 



The Negri bodies (Fig. 171) appear as round or somewhat tri- 

 angular structures, for ,the most part inside the ganglion cells. Their 

 size varies considerably, fprn ijoi to 27/i in diameter, the majority 

 measuring about s/i. In the interior of the Negri body, smaller 

 structures of variable size and number can be seen. These granules 



Fig. 171. — Section through the cornu ammonis of brain of a rabid dog; stained by 

 the method of Lentz. Five Negri bodies of different sizes are shown, enclosed within 

 the ganglion cells. The smallest contains only .three minute granules. {After 

 Lentz, Centralbl.f. Bakt, 1907, Abt. I, Vol. XLIV, p. 378.) 



may be differentially stained as in the Lentz method. Some careful 

 students of rabies regard the Negri bodies as protozoa and consider 

 them to be the infectious agent. Proof of this belief is still lacking 

 inasmuch as it has not yet been conclusively shown that they are 

 actually living organisms. 



A wound infected by a rabid animal should be thoroughly cauter- 

 ized, under anaesthesia if desired, at the earUest possible moment, and 



