Equine Aural Plaque

general considerations

common throughout USA

rare in horses <1y

no breed or sex predilection

etiology and pathogenesis

papilloma virus

back flies may be mechanical vector

history

doesn't bother horses

horse doesn't allow head or ears touch

difficulty putting the bridle or halter on

CS

one to severeal grey or white sharply demarcated plaques

inner surface of pinna(e)

severe cases >50% of inner pinnae affected

Screen Shot 2021-03-03 at 4.14.46 PM

usually asymptomatic

may cause discomfort

persist indefinitely

diagnosis

well it's a pretty pathoneumonic presentation so...

biopsy if you really want

search for ear ticks, foreign bodies, mange

treatment

benign neglect

topicals

5% imiquimod

5% acyclovir anecdotally

fly control