Ectoparasites 2 Flashcards
what are mites and ticks?
arachnids
how many pairs of legs do mites have?
adult: 4
nymph: 4
larva: 3
where does mating occur for Demodex canis?
at the opening of the hair follicle
where do Demodex canis gravid adult females lay eggs?
sebaceous gland
which demodectic species is contagious?
D. gatoi
when are demodectic species acquired?
parturition and first days after birth
what is adult-onset demodicosis commonly associated with?
immunosuppression
does generalized demodicosis carry a good prognosis?
no- poorer prognosis
what are the main pathomechanisms of canine demodocosis?
cutaneous barrier, hair follicles rupture
inflammation
type IV hypersensitivity
secondary bacterial infection
for localized demodicosis, how many affected areas are there and how large are they?
4 or less
<2.5 cm in diameter
how many feet are affected in localized demodicosis?
one
how is demodicosis diagnosed?
deep skin scrape (common)
hair plucking
skin biopsy
which diagnostic for demodicosis is the most sensitive?
deep skin scrape: almost 100%
considered standard
what is the treatment of demodicosis in dogs and cats?
benign neglect localized demodicosis and juvenile-onset
identify and treat secondary infections
identify and correct comorbid conditions in adult-onset generalized demodicosis
why does demodicosis occur in exotic, horses, and farm animals?
uncommon to rare
secondary infections
immunocompromised/immunosuppressed animals
