Unit 2: Feline Dermatitis Flashcards

1
Q

What are the most common reasons for pruritus in cats?

A

Fleas, parasite hypersensitivity, cutaneous adverse food reaction, dermatophytosis, “catopy”

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2
Q

What is the #1 reason for itchy cats?

A

Fleas (C. felis)

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3
Q

What parasites contribute to hypersensitivity in cats?

A

O. cynotis, C. blakei, N. cati, D. gatoi, mosquitoes

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4
Q

What dermatophyte affects cats?

A

M. canis

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5
Q

T/F: It is more common to see food allergies in cats than in dogs.

A

True

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6
Q

What is “catopy”?

A

Non-flea, non-food hypersensitivity dermatitis (NFNFHD)

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7
Q

What is the presentation of an allergic cat?

A

Excessive grooming, eosinophilic skin lesions, miliary dermatitis, head and neck pruritus, recurrent otitis

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8
Q

What is the most over-diagnosed cause for cats excessively grooming?

A

psychogenic alopecia

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9
Q

What type of diagnosis is psychogenic alopecia?

A

diagnosis of exclusion

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10
Q

How can you R/O psychogenic alopecia?

A

Put cat on pred - if there is response to steroid, there is inflammation present and this eliminates psychogenic alopecia as a DDx

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11
Q

What do eosinophilic skin lesions look like?

A

Can be indolent ulcers, can be plaques that are raised and look like ulcers

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12
Q

What will you see on cytology with eosinophilic skin lesions?

A

Numerous eosinophils

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13
Q

What 2 components are required for addressing eosinophilic lesions?

A

Inflammation and infections

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14
Q

What can be used with inflammation due to eosinophilic lesions?

A

Prednisolone

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15
Q

What antibiotics can be used with eosinophilic lesions?

A

Clavamox, cefpodoxime, cefovecin

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16
Q

What is miliary dermatitis?

A

Bacterial skin infection of cats

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17
Q

What is important to ask the owner when we think the cat is allergic?

A

If there are other animals in the house, if they are affected, and when the last cat was added

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18
Q

What should we think of if we see multiple cats with the same lesions around the same time?

A

parasites

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19
Q

What are initial diagnostics to do for cat allergy and which 2 are most important?

A

Flea comb, fecal float, skin scrape, cytology, fungal PCR/DTM culture

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20
Q

Why should a fecal be done when allergy is involved?

A

It is common to find organisms in the feces because cats groom so much

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21
Q

Why should we do a fungal PCR/DTM culture with allergy?

A

It is stardard of care to eliminate ringworm as a DDx because it is so common in cats

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22
Q

What steps are important when dealing with fleas?

A

Kill fleas on pet, address the environment, treat all pets, prevention, ensure resolution prior to moving on

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23
Q

What is the most contagious form of demodicosis?

A

D. gatoi

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24
Q

What is the single most effective treatment for D. gatoi?

A

Lime sulfur rinse - weekly for 6-8 weeks

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25
Q

What are other, less evidential forms of treatment for D. gatoi?

A

Ivermectin, Advantage Multi, Bravecto, Revolution Plus

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26
Q

What is used to treat pruritus in D. gatoi cases?

A

Short course of steroids - methylpred or prednisolone

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27
Q

What is this?

A

Cheyletiella

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28
Q

What is this and how do you know?

A

Otodectes, has suction cups on end

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29
Q

What are common treatments for ectoparasites? (other than D. gatoi)

A

Revolution (plus), Adv Multi, Bravecto, Macrocyclic lactones (ivermectin, doramectin); also can use lime sulfur

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30
Q

Mosquito bite hypersensitivity is a _____ disease.

A

seasonal

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31
Q

Where do lesions occur for mosquito bite hypersensitivity?

A

Bridge of nose, pinnae, and pads

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32
Q

How is mosquito bite hypersensitivity diagnosed?

A

Clinical findings and response to mosquito-free environment

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33
Q

What are good treatments for mosquito bite hypersensitivity?

A

GCs, avoidance (dusk to dawn), nepetalactone, Avon Skin so Soft

34
Q

What SHOULD NOT be used to treat mosquito bite hypersensitivity?

A

Pyrethrins and permethrins, Deet

35
Q

What are good drugs for pyoderma?

A

Simplicef, Convenia, Clavamox, Clindamycin

36
Q

What are good drugs for Malassezia dermatitis?

A

Fluconazole, Itraconazole, antifungal-containing mousse

37
Q

What does a negative RealPCR ringworm panel result mean?

A

It maybe is negative

38
Q

What are the 4 hallmarks to consider with food allergy?

A
  1. Non-seasonal
  2. Lack of response to GCs
  3. Age of onset
  4. Concurrent GI symptoms
39
Q

What are the top 3 food allergens in cats?

A

Beef > Fish > Chicken

40
Q

What are 3 diets that can be used in an elimination trial?

A

Novel protein, hydrolyzed, home cooked

41
Q

Why may home cooked diets be better when feeding chicken?

A

Processed chicken might have allergens present that would otherwise not be there - due to temperature used in processing and denaturing of protein

42
Q

What are some examples of novel protein Rx diets?

A

RC rabbit and pea, BB alligator and pea

43
Q

What are some examples of Rx hydrolyzed diets?

A

RC HP, RC ultamino, Purina HA, Hill’s z/d, BB HF

44
Q

T/F: Owners can buy OTC pet food and it is jsut as effective as home cooked or Rx diet elimination trials.

A

FALSE

45
Q

How is a food elimination trial done?

A
  1. Choose diet - feed for 9-12 weeks
  2. If better, rechallenge and let them eat what they used to
    1. If not better, is not likely food allergy
  3. With rechallenge, if gets worse again = food allergy –> put them back on the diet that made them better
    1. If does not get worse, allergy is seasonal in nature
46
Q

What is necessary to diagnose NFNFHD?

A

R/O all other causes, must be seasonal

47
Q

T/F: There are no existing tests to diagnose or confirm NFNFHD?

A

True

48
Q

What are antihistamines good for in cats with NFNFHD and which 2 are used?

A

Good for prevention but after symptoms start;

Chlorpheniramine, Ceterizine (Zyrtec)

49
Q

What is the most effective treatment for feline NFNFHD?

A

GCs (pred, methylpred, triamcinolone)

50
Q

What is the only labeled product for use in treating allergic manifestations in cats?

A

Cyclosporine

51
Q

Why do we use antihistamines in cats?

A

To lower the dose of other drugs like Cyclosporine

52
Q

_____ steroids are preferred to _____. Why?

A

Oral, injectable;

Preferred because if there is a reaction the dose can be adjusted quickly

53
Q

What are adverse events of cyclosporine in cats and what is the prevalence?

A

63%;

GI related, weight loss, lethargy, concern for cancer?

54
Q

How does ASIT in cats compare to dogs?

A

It is similar, but cats are slightly harder to test

55
Q

What drug should only be thought of as a last resort in cats with allergy?

A

Apoquel

56
Q

What organ can be affected with oclacitinib use in cats?

A

kidneys

57
Q

What is plasma cell pododermatitis?

A

“pillowfoot”;

Reaction pattern vs. disease - allergic, infectious, structural abnormality

58
Q

What cats most commonly have plasma cell pododermatitis?

A

DSH and neutered males

59
Q

What is the most common complaint with plasma cell pododermatitis?

A

Lameness - soft, swollen pads, mushy feel, possible ulcerations, fissures, and cracks

60
Q

How is plasma cell pododermatitis diagnosed?

A

FNA or biopsy

61
Q

How can plasma cell pododermatitis be treated?

A

Doxycycline, GCs, cyclosporine, diet trial, surgical excision

(surgical excision is worst possible thing you can do here)

62
Q

What is feline idiopathic ulcerative dermatitis?

A

Solitary crusted ulcers along the dorsal cervical region - it is of unknown etiology

63
Q

Pruritus and pain in feline idiopathic ulcerative dermatitis are _____.

A

variable

64
Q

What is a common secondary manifestation of feline idiopathic ulcerative dermatitis?

A

Infection

65
Q

How is feline idiopathic ulcerative dermatitis treated?

A

Treat secondary infections (SSD cream), systemic/intralesional GCs or CsA, protective bandages, diet trials, surgical excision, Topiramate and Apoquel

66
Q

What is feline lung digit syndrome?

A

Asymptomatic bronchogenic or squamous cell carcinomas of the lungs

67
Q

What is the signalment for feline lung digit syndrome?

A

older cats

68
Q

How does feline lung digit syndrome present?

A

Multiple digits on multiple paws affected; lytic and destructive process, patients present for lameness

69
Q

What is the mean survival time of feline lung digit syndrome?

A

60 days

70
Q

What is feline paraneoplastic alopecia (how does it present)?

A

The skin appears shiny, glistening, smooth, with or without fine scale; pads may also be involved

71
Q

What is the onset and progression of feline paraneoplastic alopecia?

A

Onset = rapid, Progression = several weeks

72
Q

What cats get feline paraneoplastic alopecia?

A

Older cats with pancreatic adenocarcinomas or bile duct carcinomas

73
Q

What cats get feline exfoliative dermatitis?

A

older cats with thymoma

74
Q

What signs are noticed first in feline exfoliative dermatitis?

A

Skin signs noticed before clinical signs as a direct result of the mass (coughing, dyspnea, anorexia, weight loss)

75
Q

How does feline exfoliative dermatitis present?

A

Marked scaling with progressive alopecia +/- erythema and pruritus

76
Q

How is feline exfoliative dermatitis diagnosed?

A

Biopsy and radiology

77
Q

What is the treatment and survival for feline exfoliative dermatitis?

A

Tx = surgical excision

Survival = 3 years (75%)

78
Q

What is feline skin fragility syndrome?

A

Acquired condition of older cats with severe systemic disease where the skin tears and bruises under normal activity without bleeding

79
Q

What are some concurrent systemic diseases that can be seen with feline skin fragility syndrome?

A

Cushing’s, biliary and hepatic carcinomas, hepatic lipidosis

80
Q

What is pathogenesis of feline skin fragility syndrome secondary to?

A

Catabolic effect of the underlying condition