Pyoderma Flashcards
What are the 4 potent toxins/enzymes produced by Staph pseudintermedius?
- Beta-lactamases
- Protein A
- Proteases
- Slime
There is an increase adherence of Staph pseudintermedius to keratinocytes in ____ animals.
There is an increase adherence of Staph pseudintermedius to keratinocytes in ATOPIC animals.
What is the most common underlying cause of pyoderma?
Atopy
What are the 5 primary factors of pyoderma?
- Allergies
- Ectoparasites
- Cornification disorder
- Endocrinopathy
- Immunodeficiency
What is the second most common underlying cause of pyoderma in the dog?
Hypothyroidism
What is the most common cause for epidermal collarettes?
Pyoderma
What is patchy hair loss an indication of?
Folliculitis
What are the differential diagnoses for pustules?
- Pyoderma
- Autoimmune diseases
- Eosinophilic pustulosis
- Pyogranulomatous dermatitis
- Dermatophytosis
What is the most common cause for pustules?
Pyoderma
There are 9 indications to run a bacterial culture. Name 5.
- Recurring infection
- History of extensive antibiotic tx
- Failure to respond to standard-of-care
- Unexpected cytology (rods)
- Less than 50% resolution within 2 weeks of therapy
- Emergence of new lesions after 2 weeks of therapy
- Residual lesions after 6 weeks of therapy
- Intracellular rod-shaped bacteri
- Prior history of MDR infection
What are the 2 topical antimicrobials used for focal pyodermal lesions?
- Benzoyl peroxide
2. Mupirocin
Is ultrasonic bathing bactericidal or bacteriostatic?
Bactericidal
Which of the following would be the antimicrobial of choice for treating pyoderma: bactericidal drug or bacteriostatic drug?
Bactericidal drug
What are the 4 effective antibiotics for treating pyoderma?
- Fluoroquinolones
- Potentiated amoxicillin
- Synthetic penicillins
- Cephalosporins
In treating pyoderma, how often should cephalexin be administered?
Orally 2x daily
In treating pyoderma, how often should cefpodoxime be administered?
Orally 1x daily
In treating pyoderma, how oftern should cefovecin be administered?
SQ every 14 days
How would you classify a surface pyoderma?
Epidermis remains intact
How would you classify a superficial pyoderma?
Epidermis and/or hair follicles are involved
How would you classify a deep pyoderma?
Extension of infection into the dermis
How would you classify a cellulitis pyoderma?
Invasion of fascial planes and subcutis
What is the medical phrase for a “hot spot”?
Acute moist dermatitis
Is acute moist dermatitis pruritic?
Yes, focally pruritic
What is “puppy pyoderma”?
Impetigo
Is impetigo pruritic?
No, absent to mild pruritus
What are 3 predisposing factors to impetigo?
- Husbandry
- Parasitism
- Nutritional factors
Describe the lesions commonly seen with impetigo.
Subcorneal pustular lesions, typically on the belly
What is generally the agent causing impetigo?
Staph pseudintermedius
How would you approach treatment of impetigo?
- May resolve spontaneously
- Topicals (BPO shampoo for 3-4 days)
- Systemics (7-10 days)
What is skin fold dermatitis?
Intertrigo
Which 3 breeds are predisposed to intertrigo?
- American cocker spaniel
- English bulldog
- Chinese sar pei
What is folliculitis?
Inflammation of the hair follicle
What are the 3 most common causes of folliculitis?
- Demodex
- Dermatophytes
- Bacterial
What is the most common bacterial cause of folliculitis?
Staph pseudintermedius
In which breeds in folliculitis most commonly seen?
Short-haired dog breeds:
- Doberman pinscher
- English bulldog
- Dalmation
Follicular inflammation results in a shift of follicles into which state of hair growth?
Telogen
What are 2 treatment options for folliculitis?
- Topical shampoo (3-7 x). BPO or mupirocin for focal lesions.
- Systemic antimicrobials (30 days)
When in doubt, how long should you treat folliculitis?
30 days
What condition leads to cicatricial alopecia?
Furunculosis
What is the KEY lesion to furunculosis?
Draining tracts
What would you call draining tracts with bloody, sanguineous discharge?
Furunculosis
