Dog Pyoderma: Skin Infections and Underlying Causes

Canine pyoderma is a common bacterial skin infection that recurs without identifying and treating the underlying predisposing cause.

Key Facts

Pyoderma is caused by Staphylococcus pseudintermedius, a normal skin commensal that overgrows in compromised skin
Superficial pyoderma causes pustules and crusting; deep pyoderma involves the dermis and subcutaneous tissue
Underlying causes include allergic skin disease, hypothyroidism, immunosuppression, and anatomical skin fold problems
Recurrent pyoderma strongly suggests an unidentified underlying condition driving repeated bacterial overgrowth
Treatment requires appropriate antibiotic selection guided by culture and sensitivity in recurrent cases
MRSP (methicillin-resistant Staphylococcus pseudintermedius) is an emerging problem in dogs with frequent antibiotic exposure
Topical antiseptic shampoos and sprays reduce bacterial load and can be used long-term safely

Welfare Considerations

Pyoderma causes skin discomfort, pruritus, and pain, particularly in deep pyoderma where ulceration and abscess formation occur. Recurrent pyoderma without addressing the underlying cause means dogs experience repeated episodes of skin infection and discomfort throughout their lives. Identifying the predisposing cause - most commonly allergic skin disease - allows targeted treatment that prevents recurrence and dramatically improves quality of life.

What You Can Do

Seek veterinary evaluation for any dog with recurring skin pustules or crusty lesions
Request investigation of the underlying cause rather than accepting repeated courses of antibiotics
Ask about culture and sensitivity testing for recurrent pyoderma to ensure appropriate antibiotic selection
Implement topical antiseptic management with chlorhexidine shampoos to reduce infection frequency
Address underlying allergic disease as the most common predisposing cause of recurring pyoderma
Maintain skin folds in predisposed breeds clean and dry to prevent deep fold pyoderma