Anatomical Changes. 



143 



Natural infection takes place on living in mnsty, moist- 

 warm, ill-ventilated spaces and in consequence of the ingestion of 

 mouldy feed. Ani- 

 mals wliicli get but 

 little into the open 

 air and which are 

 feeble or weak ap- 

 pear to be predis- 

 posed. The disease 

 is, therefore, most 

 common among do- 

 mestic fowls, since 

 they are compara- 

 tively frequently 

 kept in mouldy, 

 moist, poorly venti- 

 lated places. Pri- 

 marily affected are 

 pigeons, chickens, 

 ducks, geese, some- 

 times also other 

 birds, and even 

 cage birds (Johne 

 saw pneumonomy- 



cosis in nineteen flamingoes of a zoological garden ; other authors 

 have seen the disease in parrots). Mycotic pneumonia has 

 more rarely been 

 seen in mammals ; 

 Schultz, Rivolta, 

 Martin, Bollinger, 

 Lucet, Peck saw the 

 disease in horses ; 

 Rockl, Plana, Bour- 

 nay, Ravenel, in 

 cows ; Hartenstein, 

 in calves (in eleven 

 calves in Hungary) ; 

 Hellews, in sheep in 

 enzootic extent; 

 Mazzantini, in a 

 lamb ; Serrurier & 

 Rousseau, in a stag ; 

 and Rivolta, in a 

 dog. 



Fig. 19. Aspergillus glaucus, 



Fiff. 20. Penieilliiun ftlaucum. 



Anatomical 

 Changes. Dirty yel- 

 low or greenish, 



mouldy looking, dry deposits are formed on the mucosa of the 

 bronchi and on the internal surface of the air cells in birds; 



