DirHTHHRIA IN FOWLS 4^5 



21. Salmon. Rabies, its cause, frequency and treatment. Vear 

 Book, Dept. of Agrkidttire, Washington, D. C. 1900. 



22. Salmon. Rabies in the District of Columbia. Ciicidar No. 

 ?<9, U. S. Bureau of Animal Industry, 1900. 



23. SrzoK. Hydrophobia. An account of M. I'asteur-s system. 



1887. 



24. SCHi;:DHR. Der Negrische Erreger der Tolhvulh. Deut. Med. 



Wochenschrift, 1903, No. 39, 5'. 700. 



25 V.\N Gehuchten and Nklis Diagnostic histologique de la 

 rage. Anuales de Med. Vet., Vol. XLIX ( 1900). P- 234. 



26. WAV. The Negri bodies and the diagnosis of rabies. Amer. 



Vet. Review, Vol. XXIX (1905^. P- 937- 



27 Wi.SBROOK AND WiLSON. Preliminary report on the labora- 

 tory diagnosis in twenty cases of suspected rabies. Trans. Am. Public 

 Health Assn.,\%(i'i. 



28. Williams and Lowde. The etiology and diagnosis of hydro- 

 phobia. Jour, of Infectious Diseases, Vol. 3, 1905. P- 452- 



DIPHTHERIA IX FOWLS. 

 Synonyms. Roup-; pip ; canker ; swelled head. 



^ 376. Characterization. Diphtheria of birds is an in- 

 fections disease the lesions of which first appear on the mucous 

 membrane of the nasal passages, the eyes, the mouth, the 

 pharvnx and larvnx, and which may extend to the trachea, 

 bronchi, the air sacs, the intestines and possibly to other 

 abdominal organs. The disease is determined by a grayish- 

 yellow fibrinous exudate which forms upon the mticous surface 

 of one or more of the parts mentioned. The exudate may be 

 so abundant as to obstruct the air passages. In some out- 

 breaks, it is very acute, progresses with great rapidity and de- 

 stroys most of the birds attacked. 



' Fowls (genns Callus) and pigeons (genus Coliimba) are 

 most commonly attacked and they are the only ones considered 



*The origin of this term is somewhat obscure, but it is supposed to 

 be a corruption of croup, and its application explained on account of a 

 peculiar hoarseness accompanying the respiration of the attected buds. 



