SMALLPOX, SYPHILIS, CANCER, ETC. 205 



I do not think much is to be gained by a detailed account 

 of foreign structures met with in benign neoplasms, with 

 the exception of molluscum contagiosum, where they can 

 easily be cultivated. But the appearances in breast adenoma 

 bear one important message, namely that plassomyxes 

 are capable of indefinitely prolonged life and reproduction 

 in the plasson state. 



Cell-inclusions are abundant in some adenomas of the 

 thyroid gland, and in the common tumour of the prostate 

 certain features suggest that plassomyxes exist in intimate 

 association with connective-tissue cells. 



Hydrophobia. The incubation of this disease is of 

 very variable duration, between 15 and 60 days as a rule 

 but it may be even longer. 



Negri first described corpuscles in cells of the central 

 nervous system of animals killed whilst suffering from 

 hydrophobia. He regarded the bodies as parasites and 

 named the species Neuroryctes lyssae. 



Negri-bodies are visible in fresh unstained preparations. 

 In dogs that have been killed on account of this disease 

 (street rabies) the bodies may measure 18 p, or more ; in 

 rabbits that have been inoculated with virus that having 

 been passed through a series of rabbits has acquired a 

 definite virulence (fixed virus), the bodies are small, ^p. 

 or less. 



By means of Negri' s bodies a diagnosis can be made in 

 a few minutes from smears of a suspected animal's brain. 



