09 - Parasitic Dz (Pruritic!)

Question 1

(flea allergy dermatitis)

1. major cause of skin disease in dogs, most common cause of pruritis in cats

Question 2

(flea allergy dermatitis)

1. what is the common flea that causes?
2. why do these cause problems?

Answer 2

1. ctenacephalides felis
2. hypersensivity rxn to flea saliva

(type 1 and 4)

Question 3

(flea allergy dermatitis)

(dog clinical signs)

1. condition of skin?
2. distribution?

Answer 3

1. pruritis, primary papular eruption, secondary pyoderma (from self trauma due to itchiness)
2. tail head region, inner and caudal thighs, flexures of elbows

Question 4

(flea allergy dermatitis)

(cat clinical signs)

1. skin condition?
2. distribution?

Answer 4

1. miliary dermatitis, may only see alopecia w/ self-trauma/excessive grooming
2. commonly neck, head, tail base (can be generalized)

Question 5

(flea allergy dermatitis)

(diagnosis)

1. compatible cx
2. presence of what?
3. can absence of fleas rule out this condition?

Answer 5

2. fleas, flea dirt, tapeworm segments
3. no!

Question 6

(flea allergy dermatitis)

(treatment)

1. eliminate flea exposure, adultacidal plus larvacidal or ovacidal flea control products
2. control pruritis and treat 2° infection w/ appropriate abx

Question 7

(scabies)

1. caused by what?
2. species specific?
3. contagious?
4. life cycle spent where?

Answer 7

1. sarcoptes scabiei var. canis mite
2. yes… but can infect different species for short time
3. EXTERMELY!
4. all on host

Question 8

(scabies)

1. cx?
2. distribution?

Answer 8

1. EXTEREMLY pruritic, lesions secondary to self trauma (crusts, excoriations, lichenification)
2. ear margins, lateral hocks and elbows, ventral abdomen, chest

Question 9

(scabies)

(dx)

1. this condition can mimic what?
2. multiple superficial skin scrapings
3. response to therapy is often diagnostic

Answer 9

1. allergic skin dz

Question 10

(scabies)

(treatment)

Question 11

(pediculosis)

1. pediculosis = ?
2. species specific?
3. transmitted how?
4. dx how?
5. tx?

Answer 11

1. lice infestation
2. yes
3. direct contact
4. direct visulation or tape cytology and microscopic examination
5. most flea control products kill lice

treat all in contact animals

Question 12

(trombiculosis)

1. infestation with what?
2. adults are free living - what causes itchiness?

Answer 12

1. chiggers
2. bright orange colored larvae cause it

Question 13

(cheyletiellosis)

1. aka what?
2. infects what animals?
3. contagious?

Answer 13

1. walking dandruff (mites are very large with large pinching mouthparts)
2. dogs, cats, rabbits
3. HIGHLY!

Question 14

(cheyletiellosis)

1-2. cx?

Answer 14

1. mild/mod pruritis
2. excessive scaling (seborrhea), especially along the dorsum

Question 15

(cheyletiellosis)

1. dx?

Answer 15

1. broad superficial skin scrapings

Question 16

(Notoedric mange: notoedres cati)

1. highly contagious among what species? how?
2. severe pruritis where?
3. dx?

Answer 16

1. cats, direct contact
2. head and neck
3. superficial skin scrapings; mites are easy to find compared to canine scabies mite