Ectoparasites 2

Question 1

what are mites and ticks?

Answer 1

arachnids

Question 2

how many pairs of legs do mites have?

Answer 2

adult: 4
nymph: 4
larva: 3

Question 3

where does mating occur for Demodex canis?

Answer 3

at the opening of the hair follicle

Question 4

where do Demodex canis gravid adult females lay eggs?

Answer 4

sebaceous gland

Question 5

which demodectic species is contagious?

Answer 5

D. gatoi

Question 6

when are demodectic species acquired?

Answer 6

parturition and first days after birth

Question 7

what is adult-onset demodicosis commonly associated with?

Answer 7

immunosuppression

Question 8

does generalized demodicosis carry a good prognosis?

Answer 8

no- poorer prognosis

Question 9

what are the main pathomechanisms of canine demodocosis?

Answer 9

cutaneous barrier, hair follicles rupture
inflammation
type IV hypersensitivity
secondary bacterial infection

Question 10

for localized demodicosis, how many affected areas are there and how large are they?

Answer 10

4 or less
<2.5 cm in diameter

Question 11

how many feet are affected in localized demodicosis?

Answer 11

one

Question 12

how is demodicosis diagnosed?

Answer 12

deep skin scrape (common)
hair plucking
skin biopsy

Question 13

which diagnostic for demodicosis is the most sensitive?

Answer 13

deep skin scrape: almost 100%
considered standard

Question 14

what is the treatment of demodicosis in dogs and cats?

Answer 14

benign neglect localized demodicosis and juvenile-onset
identify and treat secondary infections
identify and correct comorbid conditions in adult-onset generalized demodicosis

Question 15

why does demodicosis occur in exotic, horses, and farm animals?

Answer 15

uncommon to rare
secondary infections
immunocompromised/immunosuppressed animals

Question 16

what species of Demodex are possible in hamsters?

Answer 16

D. criceti
D. aurati
D. phodopi

Question 17

what species of Demodex are possible in equine?

Answer 17

Demodex equi
D. caballi

Question 18

what species of Demodex are possible in small ruminants?

Answer 18

Demodex caprae
Demodex ovis

Question 19

what Demodex can infect bovine?

Answer 19

Demodex bovis

Question 20

what are the nonfollicular mites?

Answer 20

Demodex cornei
Demodex gatoi

Question 21

which species are cat-specific?

Answer 21

Demodex cati
Demodex gatoi
unnamed species

Question 22

with the exception of ___________, which is ___________, demodectic species in mammals are considered normal residents of skin

Answer 22

D. gatoi
contagious

Question 23

what can predispose exotic, horses, and farm animals to demodicosis?

Answer 23

malnutrition
stress
drugs
endocrinopathies or infectious, neoplastic diseases

Question 24

what demodex species can be found in ferrets?

Answer 24

D. canis
also others

Question 25

why would a ferret have demodicosis?

Answer 25

immunosuppressed

Question 26

how can a ferret be treated with demodicosis?

Answer 26

ivermectin or topical moxidectin and imidacloprid

Question 27

how can a hamster with demodicosis be treated?

Answer 27

ivermectin or topical moxidectin and imidacloprid

Question 28

which species of exotics, horses, and farm have a pruritic reaction to demodex?

Answer 28

ferrets hamsters camelids (extremely rare)

Question 29

how are ruminants treated for demodicosis?

Answer 29

pour on avermectins

Question 30

what demodex species infects swine?

Answer 30

Demodex phylloides