152 



POULTRY DISEASES 



expulsion of miieus. There is a loss of appetite, 

 ilie l)ii-(l ni)pears weak, Avalks unsteadily, and be- 

 comes cniaeiated rapidly. At times breathing is 

 diilicnlt, and there is often a diarrhea. 



Three stages then follow: catarrhal, character 

 ized by a mncns, or mneo-pnrnlent, discharge; the 

 di]^htheric, affecting the month and throat and 



Fig. 48. Diphtheric Roup in a Chicken 



A, The yellowish-white diphtheric patches on upper surface of tongue 



and lower jaw (natural size). 

 B, diphtheric patches on hard palate and upper jaw. 



characterized bv the formation of a membrane on 

 the surface which may be followed later by slough- 

 ing (formation of a mass of dead tissue) ; and the 

 conjunctival, atfecting the eyes, and often causing 

 a destruction of the eyeball. 



Postmortem Appearance — The toxin (poison) 

 from the areas of disease is verj^ destructive, as 



