Derm 2: Food allergies, ectoparasites, otitis, cats (E2) Flashcards Preview

SAM 2 scs RUSVM > Derm 2: Food allergies, ectoparasites, otitis, cats (E2) > Flashcards

Flashcards in Derm 2: Food allergies, ectoparasites, otitis, cats (E2) Deck (116)
Loading flashcards...
1

What organisms cause dermatophytosis? What becomes infected and how is it transmitted?

Microsporum canis 

M. gypseum

Trichophyton metagraphytes 

Fungal infection of: Ketatinized tissues, claws, hair, stratum corneum 

Transmission: Direct contact 

2

T/F: Food allergic dermatitis is a cutaneous adverse food reaction whose pathogenesis is idential to atopy. 

True

3

What 3 drugs do poloxamer otic gels contain?

Florfenicol

Terbinafine

Betamethasone acetate 

4

Where do you often see symmetrical alopecia in cats with atopic dermatitis? Food allergic dermatitis? Scabies?

Atopic: Medial thighs, ventrum, forelimbs, flanks 

Food: face, head 

Scabies: pinna, face, neck, forelimbs, progressing to whole body

5

What etiology does coffee ground-looking ear discharge indicate? What if it is moist and brown? Creamy yellow? Oily yellow-tan?

How can you determine the cause definitively? 

Coffe grounds: mites 

Moist, brown: staph or yeast

Creamy yellow: Gram - bacteria

Oily yellow-tan: glandular disorder or HS 

Cytology 

6

What dermatologic presentations are associated with pruritus in cats? What are 2 common causes?

Bilateral symmetrical hair loss with normal (non-inflamed) skin

Miliary dermatitis 

Eosinophilic granuloma complex

Causes: Fleas, Ringworm

7

Which 2 tests can you do to diagnose sarcoptes? Which one  is better? 

Fecal floatation (better)

Superficial skin scrape x 6 (extremely difficult to find mite)

8

What is the first line topical antibiotic choice for otitis externa? Why is it a problem when there is purulent exudate?

Neomycin-Polymixin (Surolan)

Polymixin doesn't work in pus

9

What are the infectious causes of Feline Leprosy?

Nocardia

Actinomyces

Mycobacterium

Dermatomycoses 

10

What specific diets is based on the theory that if particles are really small they cannot bind to the respective IgE particle on mast cells, preventing degranulation (i.e. allergic reaction)? 

Hydrolyzed protein diets 

11

How long do you treat superficial pyoderma? Deep pyoderma?

Superficial: 3-4 weeks minimum, 1 week post-resolution 

Deep: 3-12 weeks, 2 weeks post-resolution 

12

T/F: Ear cultures are indicated for all cases of acute otitis externa.

False, not usually if acute

Culture (and sensitivity) may be indicated in chronic recurrent or unresponsive cases 

13

What are some common antibiotics used to treat deep pyoderma? Include any important side effects. 

Amoxycillin-clavulanic acid (Bactericidal aminopenicillin with beta-lactamase inhibitor (clav) that expands its spectrum)

Cephalexin

Trimethoprim-sulphurs Side effects: Liver and renal damage (C/O'd if have issues with liver or kidneys), careful in Dobermans (immune disease), can crysallize urine, irreversible keratoconjunctivitis sicca, can cause hypothyroidsm in dogs (longterm use)

Enrofloxacin Side effects: GI distress; Cats- blindness

Erythromycin/Clindamycin/Lincomycin (Macrolides) Side effects: Careful in dogs w/MDR-1

14

Sort the following as either against generalized severe greasy seborrhea or dry-moderately greasy sebohhea. 

KetoChlor (2% ketoconazole + 2% chlorhex)

Selenium sulfide (1%)

Miconazole (1-2%)

Head and Shoulders Instensive 

Selsun Blue

Chlorhexidine (1-2%)

Greasy: 

Head and Shoulders Instensive 

Selsun Blue

1% Selenium sulfide 

 

Dry:

KetoChlor (2% ketoconazole + 2% chlorhex)

Miconazole (1-2%)

Chlorhexidine (1-2%)

15

What are the 3 most common causes of folliculitis in dogs?

Bacterial

Dermatophytes

Demodex

16

What bacterium is involved in the pathogenesis of superficial pyoderma? Where does the bacteria colonize? What is the most common clinical sign?

Staphylococcus pseudintermedius

Superficial hair follicle 

Alopecia (patchy, focal)

17

Which ectoparasite causes parasitic folliciculitis in dogs?

Demodex canis

18

What species of Malassezia causes dermatitis in dogs? Cats?

Dogs: M. pachydermatis

Cats: M. sympodialis, M. globosa 

19

What is the best thing to culture in pyoderma?

Pustules 

20

What combination of starch and protein appears to be the least allergenic?

Brown rice

Tofu

21

For which type of pyoderma is cytology often critical?

Deep 

22

What gram positive filamentous aerobe causes subcutaneous absesses and draining tracts as well as pyothorax?

Nocardia

23

What is the source of infeciton if a dog develops opportunistic mycobacteriosis? What are the clinical signs?

Soil and water (saprophytic mycobacterium)

CS: Slowly developing SQ nodules, non-healing abscesses, cellulitis, ulcers, fistulas, serosanguinous/purulent exudate, regional LN enlargement 

24

T/F: Prophylactic use of topical pyoderma therapy, such as shampoos, is indicated for recurrent pyodermas and they have little to no side effects.

True

25

What are 3 active ingredients of antibacterial shampoos used to treat superficial pyoderma?

Chlorhexidine

Ethyl lactate

Benzoyl peroxide 

26

Which 3 antibiotics are 1st tier empiric therapy for pyoderma? Which are used as a last resort? 

1st Tier: 

Cephalexin (1st gen cephalosporins)

Amoxi-Clav 

Clindamycin 

 

Last Resort:

Fluoroquinolones (enrofloxacin, marbofloxacin, ciprofloxacin, orbifloxacin)

3rd gen cephalosporins (cefodoxime, cefovecin (SQ inj q1-2wks))

27

What is the most common cause of miliary dermatitis in cats? What are some viral causes?

Flea allergic dermatitis 

Herpes, FIV, FeLV

28

T/F: Bacteria or yeast are usually the primary cause of acute otitis externa. 

False

29

Pancreatic neoplasia in cats can cause symmetrical alopecia. What body parts are commonly affected and how does the skin look? 

Ventrum and legs

"Shiny" skin, hair epilates easily 

30

What is the term for "skin fold pyoderma"? Where do clinical signs manifest in various breeds?

Intertrigo

Spaniels: Lip folds

Bulldogs: Facial folds, tail root folds, vulva folds 

Spar Pei: Body folds