Ectoparasites

Question 1

Sarcoptes Scabiei

1. Generic name?
2. Animals it affects?
3. Brief lifecycle?
4. Symptoms?
5. How do we diagnose?
6. How do we treat?
7. Is it zoonotic?

Answer 1

1. canine burrowing mite
2. dogs, rarely cats
3. eggs under skin, nymphs burrow up to skin surface to adults - 4 weeks
4. crusty lesions
5. deep skin scrape
6. Selamectin, fipronil, moxidectin and imidacloprid
7. yes

Question 2

Notoedres spp

1. Animals it affects?
2. Brief lifecycle?
3. Symptoms?
4. How do we diagnose?
5. How do we treat?
6. Is it zoonotic?

Answer 2

1. cats, rare in dogs
2. eggs>larva>nymph>adult
3. crust lesions causing pruritis
4. deep skin scrape
5. selamectin, fipronil, glucocorticoids
6. yes

Question 3

Psoroptes caniculi

1. Animals it affects?
2. Brief lifecycle?
3. Symptoms?
4. How do we diagnose?
5. How do we treat?
6. Is it zoonotic?

Answer 3

1. rabbits
2. eggs>larva>nymph>adult
3. otitis externa causing ear rubbing and head shaking
4. skin scrape
5. ivermectin and isolate 2 weeks
6. no

Question 4

Trombicula autumnalis

1. Generic name?
2. Animals it affects?
3. Brief lifecycle?
4. Symptoms?
5. How do we diagnose?
6. How do we treat?
7. Is it zoonotic?

Answer 4

1. harvest mite
2. horses and rabbits
3. eggs>larvae (attach to skin and burrow - feed on tissue fluid of host then fall off into soil)>nymph (latent in soil)>adult
4. pruritic papules, can enter ears and cause head shaking
5. coat brushing and tape strips
6. fly sprays with pyrethrin and steroids
7. yes

Question 5

Demodex spp

1. Animals it affects?
2. Brief lifecycle?
3. Symptoms?
4. How do we diagnose?
5. How do we treat?
6. Is it zoonotic?

Answer 5

1. dogs, cats and horses
2. egg>larva>protonymph>nymph>adult
3. papules, pustules, alopecia
4. hair pluck, deep skin scrape
5. ivermectin, permethrin
6. no

Question 6

Cheyletiella spp

1. Animals it affects?
2. Brief lifecycle?
3. Symptoms?
4. How do we diagnose?
5. How do we treat?
6. Is it zoonotic?

Answer 6

1. dogs, cats and rabbits
2. eggs>larva> nymph1 >nymph 2> adult
3. scaly, dry and sometimes pruritic skin, alopecia
4. tape strip, coat brushing
5. ivermectin, lime sulfur dips
6. yes

Question 7

Otodectes cynotis

1. Generic name?
2. Animals it affects?
3. Brief lifecycle?
4. Symptoms?
5. How do we diagnose?
6. How do we treat?
7. Is it zoonotic?

Answer 7

1. ear mite
2. dogs, cats, ferrets
3. eggs>larva> nymph1 >nymph 2> adult
4. thick wax, head shaking, ear itching, secondary infections
5. Ear wax suspend in paraffin and slide prep
6. selamectin
7. yes but rare

Question 8

Ctenocephalides

1. Generic name?
2. Animals it affects?
3. Brief lifecycle?
4. Symptoms?
5. How do we diagnose?
6. How do we treat?
7. Is it zoonotic?

Answer 8

1. flea
2. cats (c.felis), dogs (c.canis), rabbits and hedgehogs
3. eggs>larvae> pupa (very resistant) > adult
4. dermatitis, itching, alopecia.
   Spreads ‘cat scratch disease’, tapeworm, and mycoplasma
5. coat brushing, tape strip, visual with naked eye
6. fipronil,, ivermectin, fluralaner, imidacloprid
7. yes but temporary

Question 9

myasis

1. Generic name?
2. Animals it affects?
3. Brief lifecycle?
4. Symptoms?
5. How do we diagnose?
6. How do we treat?
7. Is it zoonotic?

Answer 9

1. infection with flies
2. all
3. egg>maggot>fly
4. maggot infestation, itching, sores, tends to infect wounds/orifices
5. obvious with naked eye
6. ivermectin
7. yes - only if put into wound

Question 10

Linognathus setosus and Trichodectes canis

1. Generic name?
2. Animals it affects?
3. Brief lifecycle?
4. Symptoms?
5. How do we diagnose?
6. How do we treat?
7. Is it zoonotic?

Answer 10

1. L.Setosus = sucking dog louse
   T.Canis = biting dog louse
2. mainly young/old/debilitated dogs
3. eggs>nymph 1> nymph 2> nymph 3> adult
4. pruritis, seborrhea, alopecia, self-trauma, restlessness, anaemia. Also carries tapeworm
5. tape strip, coat brushing
6. pyrethrin, selamectin, imidacloprid, fipronil, fluralaner, moxidectin
7. no

Question 11

Felicola Subrostratus

1. Generic name?
2. Animals it affects?
3. Brief lifecycle?
4. Symptoms?
5. How do we diagnose?
6. How do we treat?
7. Is it zoonotic?

Answer 11

1. cat biting louse
2. mainly young/old/debilitated cats
3. eggs>nymph 1> nymph 2> nymph 3> adult
4. pruritis, seborrhea, alopecia, self-trauma, restlessness, anaemia
5. tape strip, coat brushing
6. Ivermectin, selamectin, fipronil
7. no

Question 12

Ixodes spp

1. Generic name?
2. Animals it affects?
3. Brief lifecycle?
4. Symptoms?
5. How do we diagnose?
6. How do we treat?
7. Is it zoonotic?

Answer 12

1. ticks
2. all
3. egg>larva>nymph>adult
4. large infestation can cause anaemia. Carry lymes disease
5. visible
6. remove and use flumethrin and imidacloprid
7. yes