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A MANUAL OF BACTERIOLOGY 



absent in non-rabic conditions, that their presence or 

 absence forms a rapid and simple means of diagnosis. 



Inasmuch as the rabies virus is filterable, the view 

 taken by Prowazek of the nature of the Negri bodies is 

 that they represent the tissue reaction to invasion by the 

 parasite, the parasite being an extremely minute one 

 contained within the Negri body and belonging to a group 

 of the Protozoa termed the CTilamydozoa. In the same 



FIG. 64. Smear from hippocampus major of rabid dog : n, nucleus 

 of nerve-cell ; h, b, the Negri bodies (eosin and methylene-blue). 

 (After Williams and Lowden.) 



category he would place the trachoma bodies, the Mallory 

 bodies of scarlatina and the Councilman bodies of variola. 

 Noguchi believes that the Negri bodies or derivatives 

 from them can be cultivated in his medium used for the 

 Spironema pallidum (p. 606). 



Babes states that the virus is destroyed at a tempera- 

 ture of 60 C. , but the medulla and other infective material 

 retain their virulence for months in glycerin. He has 

 described certain lesions present in the medulla in cases 

 of rabies, the so-called rabic tubercles. These consist of 



