Lecture: Otitis externa/media dogs/cats Flashcards
1
Q
middle ear
A
bulla
2
Q
Otodectes cynotis
A
- aka ear mite
- non-burrowing obligatory parasite
- feed on lymph and blood
- more common in animals < 1 yr old
- 50% OE in cats
- 5-10% OE in dogs
- Coffee ground serumen
3
Q
Eutrombicula alfreddugesi
A
- aka chiggers
- usually more common on outside of ears
- reddish color
4
Q
otodemodicosis
A
- more common in cats (D. cati)
- ceruminous otitis externa
- suspect immunosuppresion
- FeLV, FIV, diabetes, neplasia
- evident on ear swab (don’t scrape)
5
Q
sarcoptes scabiei var. canis
A
- aka canine scabies
- usually ear tips, can be OE
- severe pruritus
- female burrows in epidermis and lays eggs
- thick yellow crusts
6
Q
Notoedres catis
A
- feline scabies, same as dogs
7
Q
Foreign body
Causes
CS
TX
A
- causes
- plant awns (barley)
- insect
- sand
- dry meds
- CS
- acute/chronic unilateral otitis
- Tx
- removal and topical antibiotic
8
Q
nasopharyngeal polyp
A
- etiology
- congenital
- bacterial
- calicivirus
- CS
- chronic uni/bilateral otitis
- mass in ear canal
- head tilt
- Tx
- sx
*cats: orginate from bulla
9
Q
secondary factors of OE
A
- infection
- bacteria: staphylococcus
- yeast: malassezia
- can be normal flora
10
Q
Summary
Patient history
A
- age of onset
- breet
- duration
- seasonality
- unilateral vs. bilateral
- previous medications
- environmental factors
11
Q
clinical signs OE
A
- odor
- head shaking
- discharge
- pruritus
- aural hematoma
- head tilt
- pain
- erythema
- edema
- lichenification
- hyperpigmentation
- exoriations
- mineralization
12
Q
Causes of otitis media
A
- extension of otitis externa
- Ascending infection via Eustachian tube
- Hematogenous spread
13
Q
DX Otitis media
A
Can be very difficult
14
Q
Otitis media
Neuro signs
A
- facial nerve paralysis
- KCS
- Horner’s syndrome
- miosis
- ptosis
- protrusion 3rd eyelid
15
Q
Otitis media
Peripheral vestibular disease
A
- head tild, nystagmus
- same side as otitis
- ataxia
- alert, normal mentation
- +/- nausea
*think inner ear problem
