CHAPTEK XXXII. 



DISEASES OP THE HEAD. NECK, VEINS, ETC. 



OTORRUffiA — EXTERNAL OANHER OF TUB EAR — POLL-EVIL — FTSTULOUS 



WITHERS CIRCUMSCRIBED AND DIFFUSE PHLERITIS TUE0MDU3 



— VARICOSE VEINS PULEBOLITES — ENTRAJfCB OF AIR INTO HIE 



VEINS. 



DISEASES OF THE EAK. 



With the exception of liability to accidental injuries — and 

 gangrene of the concha sometimes sseu in scarlatina — the ear of 

 the horee seems exempt from disease ; the dog, however, is 

 subject to two u ell-known forms of disease of the ear, namely, 

 internal and external canker. 



Internal Caril.cr, Otorrhcea, is an inflammation of the lining 

 membrane of tlio meahts auditorius extcrnus, witli a discharge 

 of purulent mat lor, sometimes mixed with blood, which may 

 occasionally coa{;-ulate, block up the tube, and cause deafness. 

 "Wlien the inflanauation extends to the internal eor it constitutes 

 " otitis," a most painful affection, causing constitutional disturb- 

 ance, in some instances delirium, coma, and death. The inflam- 

 mation of the mucous lining of the outer meatus is very often 

 agijravatcd, and otitis produced by irrational treatmeut 



The disease occurs chiefly in spaniels and retrievers, but no 

 breed is exempt; the practice of " cropping the ears" does not 

 seem to predispo<~e to it ; indeed, it is mostly met with in dog-> 

 with pendulous ears. The origin of the disease is local br 

 constitutional ; tlie local, caused by the lodgment of water, dirt, 

 or any foreign matter in the meatus ; and the constitutional, 

 arising from imi>roper and over-feoding, want of exercise, catar- 

 rhal affections, and the extension of skin diseases. 



Treatment. — "When of local origin, the treatment must bs 

 directed to the subjugation of the inflammation by locol sootlung 



