Demodex spp

Question 1

common name

Answer 1

demodectic mange mite

Question 2

suborder

Answer 2

prostigmata

Question 3

hosts

Answer 3

dogs

Question 4

feline version of this parasite

Answer 4

demodex cati- rare

Question 5

identification

Answer 5

elongate tapering body

4 pairs of stumpy legs on anterior

Question 6

size of adult

Answer 6

400 micrometers

Question 7

life cycles

Answer 7

adults in follicles
females lay eggs
larvae and nymphs at mouth of follicle

Question 8

where is this parasite found? (site of infection)

Answer 8

hair follicles and sebaceous glands

Question 9

transmission to new born pups occurs via ____ in the first 2-3 days postpartum

Answer 9

direct contact

Question 10

pathogenesis

Answer 10

localized demodecosis
alopecia
erythema

Question 11

is the presence of small numbers of mites normal?

Answer 11

yes

Question 12

what happens with generalized demodicosis?

Answer 12

5 or more areas of localized disease. the hair becomes sparse and skin becomes dry causing “red mange”. concomitant staphylococcal pyoderma develops. pustules break open and ooze. difficult and often impossible to cure

Question 13

is localized demodicosis deadly?

Answer 13

no, clinical recovery is excellent

Question 14

diagnosis

Answer 14

deep skin scrapings

hair loss

Question 15

treatment

Answer 15

amitraz

Question 16

can localized ever become generalized demodicosis?

Answer 16

yes, it can progress

Question 17

does presents of the mites indicate disease?

Answer 17

no, because mites are normal inhabitants

Question 18

how do we kill all mites?

Answer 18

must preform many recheck scrapings
treat until 2 subsequent negative skin scrapes in a row
monitor for 12 months