Otitis (Yr3)

Question 1

how does the tympanic bulla differ between cats and dogs?

Answer 1

cats have bony shelf which separates the bulla in half (significant for medical management for ventral portion of bulla)

Question 2

what are the self cleaning mechanisms of the external ear canal?

Answer 2

cerumen - sebaceous and ceruminous gland secretions catch foreign bodies, desquamated keratinocytes and microbes
epithelial migration - living keratinocytes carry cerumen and content out of canal

Question 3

what are the self cleaning mechanisms of the middle ear?

Answer 3

mucous from goblet cells traps microbes bad debris
Eustachian tube drain mucous from middle ear into the nasopharynx

Question 4

what are the primary causes of otitis in dogs?

Answer 4

parasites, allergy, foreign bodies

Question 5

what are the primary causes of otitis in cats?

Answer 5

flu, allergy, parasites

Question 6

what are common parasites causing otitis?

Answer 6

Otodectes cynotis