(02-01) Canine Pyodermas

Question 1

Are pyodermas primary or secondary?

Answer 1

always secondary to primary problem

Question 2

Do pyodermas always have to be associated with pus-producing lesions?

Answer 2

no

Question 3

What is by far the most common pathogen in canine pyoderma?

Answer 3

Staphylococcus Pseudointermedius

Question 4

(IF) What bacteria produce beta-lactamase?

beta-lactamase destroys what anti-biotics?

the three bac from above also resistant to what?

Can these be used empirically to treat canine pyoderma?

Answer 4

S. pseudointermedius, S. schleiferi, and S. aureus

penicillin, amoxicillin, ampilcillin

streptomycin and tetracyline

no

Question 5

What is the most useful classification scheme for pyoderma?

Answer 5

depth

Question 6

surface pyodermas?

superficial pyoderma?

deep pyoderma?

Answer 6

most superfical layers (pyotraumatic dermatitis (acute moist dermatitis/hot spot))

involves epidermis and/or hair follicles (impetigo, bacterial follculitis)

deeper than hair follicle (canine acne, nasal pyoderma, interdigital pyoderma, generalized deep, deep “hotspot”)

Question 7

(IF) Is hot spot self induced?

always look for what?

What dogs are predisposed to developing hot spots?

Answer 7

yes

underlying condition and treat to prevent recurrences

dogs with thick, long hair in humid weather

Question 8

(IF) All skin fold pyodermas show what kinds of lesions?

localized to what?

What offers potential for permanent cure?

Answer 8

exudative, odiferous, and erythmetous

lip, nose, vulva, tail

surgical ablation of the anatomic defect

Question 9

(IMPETIGO)

(IF) see what where?

what age?

can it be self-limiting?

requires what treatment?

look for what?

Answer 9

pustules, papules, crusts and epidermal collarettes in sparesly haired skin of groin, abdomen and axillae

dogs less than 1 year

yes

only topical therapy usually

underlying conditions…

Question 10

(Superficial Bacterial Folliculitis)

1. bacterial infection where?
2. usually secondary to what?

(IF) 3. Does it tend to recur?

4. is bacterial folliculitis usually primary?
5. If you find primary disease and manage it, you will likely do what?
6. If a lesion in a dog looks like ringworm - what is it most likely?
7. Treatment period?

Answer 10

1. in but not beyond hair follicle
2. underlying primary disease…
3. yes
4. no - usually a complication of an underlying disorder
5. decrease chance for recurrences
6. bacterial folliculitis
7. use proper antibiotic in proper dose 1 week past resolution of all skin lesions

Question 11

(Canine acne - deep pyoderma)
1. deep folliculuitis and furunculosis
2. esp in what?
(nasal pyoderma - deep pyoderma)
3. uncommon - seen in what breeds?
(Interdigital pyoderma - deep pyoderma)
4. any age, sex, or breed - but more common in what?
(generalized deep pyoderma - deep pyoderma)
5. any age or sex - what predisposed?
(deep hotspot)
6. common in what?
7. looks like hotspot... but what?

Answer 11

2. short coated breeds
3. German Shepherds, collies, pointers, hunting
4. short-coated dogs (bulldogs, labs)
5. German Shepherds
6. Golden retriever
7. skin thicker, when squeezed see draining tracts

Question 12

(DEEP PYODERMA)

1. What lesions?
2. antibiotics to treat deep pyodermas should be selected based on what?
3. treat deep pyodermas for how long?

Answer 12

1. nodule, hemorrhagic bulla, erosions to ulcerations and draining tracts exudating a serous-sanguinous exudate,
2. culture and susc results
3. two weeks past clinical resolution of signs

Question 13

(Important Information - pyoderma)

1. what is the msot common infective agen in canine pyodermas?
2. remember that these organisms produce what which do what?
3. What may be found as secondary invaders in deep pyoderma cases?
4. A pyoderma only occurs after what occurs?
5. pydodermas should always be considered a what?

Answer 13

1. coag positive S. pseudointermedius (others S. aureus and coag-neg Staph spp
2. B-lactamase - limit antibiotic options to manage pyodermas
3. proteus, pseudomonas, E Coli
4. after cutaneous defense mechanisms are disrupted
5. secondary clinical manifestation of an underlying primary problem

Question 14

(Important Information - pyoderma - cont)

1. what are the major undelying problems in most of US?
2. what are the second more common underlying primary?
3. do pyodermas recur?
4. do culture and sensitivity testing when?
5. treat a superficial pyoderma for how long? deep pyoderma for how long?

Answer 14

1. allergic diseases
2. endocrinopathies
3. they usually do (must consider predisposing disease)
4. on recurrent superficial pyodermas, deep pyodermas, poor reponse to empirical therapy, when cytology reveals mixed infection
5. 7 days after clinical cure; 14 days after clinical cure