Pyoderma In Dogs: Comprehensive Veterinary Reference Guide

Pyoderma in dogs is one of the most common dermatological conditions encountered in small animal veterinary practice worldwide. Derived from the Greek words "pyon" (pus) and "derma" (skin), pyoderma literally means "pus in the skin" and refers to a bacterial skin infection that can range from mild superficial lesions to severe, deep infections requiring intensive medical management. This comprehensive veterinary reference guide provides an exhaustive overview of pyoderma in dogs, covering aetiology, pathophysiology, clinical presentation, diagnostic approaches, treatment protocols, prevention strategies, and prognosis. The content is designed for veterinary professionals, veterinary students, and dedicated pet owners seeking a deep understanding of this condition.

Quick Q&A

Question: What is pyoderma in dogs and how is it treated? Answer: Pyoderma in dogs is a bacterial skin infection that causes pustules, papules, crusts, and hair loss. Treatment typically involves systemic antibiotics prescribed by a veterinarian for 3-4 weeks, along with topical therapy using medicated shampoos containing chlorhexidine or benzoyl peroxide. Underlying causes such as allergies, hormonal imbalances, or parasites must also be addressed to prevent recurrence.

Introduction to Canine Pyoderma

Pyoderma represents one of the most frequent reasons for veterinary dermatology consultations. According to the Merck Veterinary Manual, bacterial pyoderma is among the most common skin diseases of dogs, accounting for a significant proportion of all canine dermatological presentations. The condition is rarely a primary disease; rather, it is almost always secondary to an underlying predisposing factor that disrupts the skin's normal barrier function and immune defences.

The skin of a healthy dog serves as a formidable barrier against microbial invasion, supported by the stratum corneum (the outermost layer), the skin's microbiome, sebaceous secretions, and a robust immune system. When this barrier is compromised, bacteria, most commonly Staphylococcus pseudintermedius, proliferate and cause infection. Understanding the multifactorial nature of pyoderma is essential for successful management and long-term control.

Aetiology and Pathophysiology

Primary Bacterial Pathogens

The most common bacterium isolated from canine pyoderma is Staphylococcus pseudintermedius, a Gram-positive coccus that is part of the normal skin and mucosal microbiota in dogs. This organism has replaced Staphylococcus intermedius as the primary pathogen following taxonomic reclassification. Other bacteria that may be involved include:

• Staphylococcus aureus (less common, often associated with human contact)
• Streptococcus species
• Escherichia coli
• Proteus mirabilis
• Pseudomonas aeruginosa (particularly in deep pyoderma or otitis externa)
• Corynebacterium species

In deep pyoderma, infections are frequently polymicrobial, involving both Gram-positive and Gram-negative organisms. Methicillin-resistant Staphylococcus pseudintermedius (MRSP) has emerged as a significant concern in veterinary medicine, complicating treatment protocols and requiring culture and sensitivity testing for appropriate antibiotic selection.

Predisposing Factors

Pyoderma is rarely a primary condition. The following factors predispose dogs to developing bacterial skin infections:

Allergic Skin Disease: Atopic dermatitis, food allergy, and flea allergy dermatitis are the most common underlying causes of superficial pyoderma. Allergic inflammation disrupts the skin barrier, increases pruritus (itching), and leads to self-trauma, creating portals of entry for bacteria.

Endocrinopathies: Hypothyroidism, hyperadrenocorticism (Cushing's disease), and sex hormone imbalances impair skin immunity and barrier function. Dogs with hypothyroidism often present with recurrent pyoderma as a key clinical sign.

Anatomical Factors: Skin folds (facial folds, lip folds, vulvar folds, tail folds) create warm, moist environments that promote bacterial overgrowth. Obese dogs and brachycephalic breeds are particularly predisposed.

Parasitic Infestations: Demodicosis (demodectic mange), scabies (sarcoptic mange), and flea infestations cause pruritus and skin damage that predispose to secondary bacterial infection.

Immunosuppression: Glucocorticoid therapy, chemotherapy, or underlying immunosuppressive diseases (e.g., leishmaniasis, ehrlichiosis) increase susceptibility to pyoderma.

Poor Grooming and Hygiene: Matted coats, excessive moisture, and inadequate grooming can contribute to skin maceration and bacterial proliferation.

Nutritional Deficiencies: Zinc-responsive dermatosis and deficiencies in essential fatty acids may compromise skin health.

Pathophysiology

The pathogenesis of pyoderma involves a complex interplay between bacterial virulence factors and host immune responses. S. pseudintermedius produces several virulence factors, including:

• Coagulase (converts fibrinogen to fibrin, protecting bacteria from phagocytosis)
• Protein A (binds to IgG, interfering with opsonisation)
• Haemolysins and leukotoxins (damage host cells)
• Biofilm formation (enhances antibiotic resistance and persistence)

The host response to bacterial invasion involves neutrophil chemotaxis, phagocytosis, and the release of inflammatory mediators. In superficial pyoderma, infection is limited to the epidermis and hair follicle infundibulum (superficial folliculitis). In deep pyoderma, infection extends into the dermis and subcutaneous tissues, leading to furunculosis (rupture of hair follicles) and cellulitis.

Clinical Classification and Presentation

Pyoderma is classified based on depth of infection (superficial versus deep) and anatomical distribution. Understanding this classification is essential for appropriate treatment selection and prognostic assessment.

Surface Pyoderma

Surface pyoderma involves infection limited to the outermost layers of the skin without follicular involvement. This category includes:

Pyotraumatic Dermatitis (Hot Spots): Acute, moist, erythematous, exudative lesions that develop rapidly, often within hours. Hot spots are intensely pruritic and painful. They are common in thick-coated breeds (Golden Retrievers, Labrador Retrievers, German Shepherds) and are frequently associated with flea allergy, atopic dermatitis, or ear infections.

Skin Fold Pyoderma (Intertrigo): Inflammation and infection in opposing skin surfaces. Common locations include facial folds (brachycephalic breeds), lip folds (drooling breeds), vulvar folds (obese or spayed females), and tail folds (screw-tailed breeds). Lesions appear as moist, erythematous, malodorous dermatitis.

Mucocutaneous Pyoderma: Affects mucocutaneous junctions (lips, nares, eyelids, vulva, prepuce, anus). Presents as erythema, swelling, crusting, and fissuring.

Superficial Pyoderma

Superficial pyoderma involves infection of the epidermis and hair follicle infundibulum. This is the most common form of pyoderma in dogs.

Superficial Folliculitis: The hallmark lesion is the pustule (a small, raised, pus-filled lesion). Pustules are most easily visualised in sparsely haired areas (ventral abdomen, axillae, groin). Other lesions include papules (small, red, raised lesions), epidermal collarettes (circular areas of peeling skin), crusts, and alopecia (hair loss). Lesions often have a "moth-eaten" appearance.

Superficial Spreading Pyoderma: Characterised by rapidly expanding, circular lesions with epidermal collarettes and peripheral crusting. This form is often associated with underlying atopic dermatitis.

Deep Pyoderma

Deep pyoderma involves infection extending into the dermis and subcutaneous tissues. This is a more severe condition requiring aggressive therapy.

Deep Folliculitis and Furunculosis: Rupture of hair follicles leads to furuncles (boils) which appear as raised, erythematous, painful nodules. Lesions may drain purulent or haemorrhagic material. Common locations include the face (especially in short-coated breeds like Bulldogs, Boxers), pressure points (elbows, hocks), and interdigital spaces.

Cellulitis: Diffuse, deep inflammation of the subcutaneous tissues characterised by swelling, erythema, pain, and systemic signs (fever, lethargy, anorexia).

Callus Pyoderma: Infection of pressure point calluses (elbows, hocks). Presents as thickened, alopecic, crusted plaques that may develop draining tracts.

Interdigital Pyoderma (Pododermatitis): Infection of the interdigital spaces. Presents as erythema, swelling, pustules, furuncles, and draining tracts between the toes. This is a particularly painful and frustrating condition to manage.

German Shepherd Dog Deep Pyoderma: A unique, severe form of deep pyoderma seen in German Shepherd Dogs, characterised by extensive furunculosis, cellulitis, and draining tracts, often affecting the lumbosacral region, thighs, and face. This condition has a strong breed predisposition and is associated with underlying immune dysfunction.

Breed and Age Predispositions

While pyoderma can affect any dog, certain breeds are overrepresented:

• German Shepherd Dogs: Predisposed to deep pyoderma and recurrent superficial pyoderma, likely due to underlying immune dysfunction and high prevalence of atopic dermatitis.
• Brachycephalic Breeds (Bulldogs, Pugs, French Bulldogs, Boxers): Predisposed to skin fold pyoderma, deep facial pyoderma, and interdigital pyoderma due to conformational abnormalities.
• Golden Retrievers and Labrador Retrievers: High prevalence of atopic dermatitis and hot spots.
• Shar-Pei: Predisposed to recurrent pyoderma due to cutaneous mucinosis and underlying immune abnormalities.
• Cocker Spaniels: Predisposed to recurrent pyoderma, often associated with underlying seborrhoea and endocrinopathies.

Age at onset often reflects the underlying cause. Puppies with juvenile pyoderma (impetigo) typically present before 6 months of age. Young adult dogs (1-3 years) commonly present with allergic skin disease. Older dogs (7+ years) may develop pyoderma secondary to endocrinopathies or neoplasia.

Diagnostic Approach

A thorough diagnostic workup is essential for confirming pyoderma, identifying the causative bacteria, and uncovering underlying predisposing factors. The diagnostic approach should be systematic and evidence-based.

History and Signalment

A detailed history should include:

• Age, breed, and sex
• Duration and progression of skin lesions
• Presence and severity of pruritus
• Previous treatments (antibiotics, glucocorticoids, topical therapies)
• Response to previous therapy
• History of allergies, endocrine disease, or other medical conditions
• Diet and nutritional history
• Ectoparasite prevention
• Environmental exposures
• Travel history (relevant for regional diseases like leishmaniasis)

Physical Examination

A complete dermatological examination should be performed in good lighting, evaluating:

• Distribution and morphology of lesions
• Presence of primary lesions (pustules, papules) versus secondary lesions (crusts, epidermal collarettes, alopecia, hyperpigmentation, lichenification)
• Evaluation of skin folds, interdigital spaces, and mucocutaneous junctions
• Assessment of coat quality and grooming
• Palpation of lymph nodes (regional lymphadenopathy may be present)
• Systemic examination (temperature, cardiac, respiratory, abdominal palpation)

Diagnostic Tests

Cytology: This is the most important immediate diagnostic test for pyoderma. Samples should be obtained from:

• Pustules: Aspirate intact pustules using a fine needle or lance with a scalpel blade and transfer contents to a glass slide.
• Epidermal collarettes: Use clear acetate tape to collect surface material.
• Moist lesions: Use a sterile cotton swab to collect exudate.
• Deep lesions: Aspirate nodules or draining tracts.

Slides should be stained with Diff-Quik or Wright's stain and examined under oil immersion (1000x magnification). Cytological findings in pyoderma include:

• Degenerate neutrophils (indicating active infection)
• Intracellular and extracellular cocci (typically in pairs, tetrads, or clusters)
• Occasionally rods (suggesting Gram-negative infection)
• Acantholytic keratinocytes (in pemphigus foliaceus, a differential diagnosis)

The presence of intracellular bacteria confirms bacterial infection and warrants antibiotic therapy. Cytology also helps guide initial antibiotic selection (cocci versus rods) and monitors response to therapy.

Bacterial Culture and Susceptibility Testing: Culture and sensitivity should be performed in the following situations:

• Deep pyoderma (requiring prolonged antibiotic therapy)
• Recurrent or refractory pyoderma
• Suspected methicillin-resistant infection
• Rods identified on cytology
• Previous antibiotic failure
• Prior to initiating systemic antibiotics in severe cases

Samples for culture should be obtained from intact pustules (aspiration), deep tissue biopsies, or draining tracts (after cleaning the surface to avoid contamination). Swabs should be placed in transport media and submitted to a veterinary diagnostic laboratory.

Skin Scrapings: Superficial and deep skin scrapings should be performed to rule out demodicosis and scabies. Demodicosis is a common underlying cause of pyoderma, particularly in young dogs and immunocompromised patients.

Dermatophyte Culture: Fungal culture may be indicated if dermatophytosis is suspected (circular alopecia, broken hairs, scaling). Dermatophytosis can mimic or coexist with pyoderma.

Wood's Lamp Examination: Screening for Microsporum canis (apple-green fluorescence) in suspected dermatophytosis.

Biopsy: Skin biopsy is indicated for:

• Deep pyoderma unresponsive to therapy
• Suspected immune-mediated disease (pemphigus foliaceus, lupus erythematosus)
• Suspected neoplasia
• Atypical presentations

Biopsies should be taken from early, well-developed lesions (pustules, papules, nodules) and submitted for histopathology.

Bloodwork: Complete blood count, serum biochemistry, and urinalysis are indicated for:

• Dogs with systemic signs (fever, lethargy)
• Suspected endocrinopathy (hypothyroidism, hyperadrenocorticism)
• Dogs requiring long-term antibiotic therapy
• Baseline assessment before initiating certain medications

Endocrine Testing: Thyroid hormone levels (T4, free T4, TSH) and adrenal function testing (ACTH stimulation test, low-dose dexamethasone suppression test) should be considered in dogs with recurrent pyoderma and clinical signs of endocrinopathy.

Allergy Testing: Intradermal testing or serum allergy testing may be indicated for dogs with suspected atopic dermatitis, particularly those with recurrent pyoderma.

Differential Diagnoses

Several conditions can mimic pyoderma and must be considered in the differential diagnosis:

Demodicosis: Can present with papules, pustules, crusts, and alopecia, closely resembling superficial pyoderma. Skin scrapings are diagnostic.

Dermatophytosis: Circular areas of alopecia, scaling, and crusting. Fungal culture is definitive.

Pemphigus Foliaceus: An autoimmune blistering disease characterised by pustules, crusts, and erosions. Cytology reveals acantholytic keratinocytes. Biopsy is diagnostic.

Cutaneous Lupus Erythematosus: Presents with erythema, scaling, alopecia, and ulceration, often affecting the face, ears, and mucocutaneous junctions.

Sebaceous Adenitis: Inflammation and destruction of sebaceous glands, leading to scaling, alopecia, and follicular casts. Breed predisposition (Standard Poodles, Akitas).

Zinc-Responsive Dermatosis: Crusting, scaling, and alopecia affecting the face, pressure points, and mucocutaneous junctions. Responds to zinc supplementation.

Superficial Necrolytic Dermatitis (Metabolic Epidermal Necrosis): Associated with hepatic disease or glucagonoma. Presents with crusting, erosions, and ulceration of the footpads, face, and genitalia.

Contact Dermatitis: Localised erythema, papules, and pustules at sites of contact with irritants or allergens.

Neoplasia: Cutaneous lymphoma, mast cell tumours, and squamous cell carcinoma can mimic deep pyoderma.

Treatment Protocols

Treatment of pyoderma must address both the bacterial infection and the underlying predisposing factors. A comprehensive treatment plan includes systemic antibiotics, topical therapy, and management of the primary disease.

Systemic Antibiotic Therapy

Systemic antibiotics are the cornerstone of treatment for superficial and deep pyoderma. The choice of antibiotic should be guided by cytology, culture and sensitivity results, and the depth of infection.

Empiric Antibiotic Selection: For superficial pyoderma, first-line empiric antibiotics include:

• Cephalexin: 22-30 mg/kg PO every 12 hours (most common first-line choice)
• Cefpodoxime: 5-10 mg/kg PO every 24 hours
• Cefadroxil: 22 mg/kg PO every 12 hours
• Amoxicillin-clavulanate: 13.75-22 mg/kg PO every 12 hours
• Clindamycin: 11 mg/kg PO every 12 hours (particularly for Gram-positive infections)
• Trimethoprim-sulfonamide: 15-30 mg/kg PO every 12 hours (reserve for resistant cases due to potential adverse effects)

For deep pyoderma or cases with rods on cytology, broader-spectrum antibiotics may be required:

• Fluoroquinolones (enrofloxacin, marbofloxacin, orbifloxacin): Reserved for resistant infections due to concerns about resistance development and potential adverse effects (cartilage damage in growing dogs).
• Chloramphenicol: 40-50 mg/kg PO every 8 hours (for multidrug-resistant infections)
• Doxycycline: 5-10 mg/kg PO every 12 hours (for MRSP and certain Gram-negative infections)
• Aminoglycosides (gentamicin, amikacin): Reserved for severe, hospitalised cases due to nephrotoxicity risk.

Duration of Therapy: Treatment duration is critical for successful resolution and prevention of recurrence.

• Superficial pyoderma: Minimum 3 weeks of antibiotic therapy. Treatment should continue for at least 7-10 days beyond clinical resolution (complete healing of all lesions).
• Deep pyoderma: Minimum 8-12 weeks of therapy, often longer. Treatment should continue for at least 2-4 weeks beyond clinical resolution.

Premature discontinuation of antibiotics is the most common cause of treatment failure and recurrence.

Antibiotic Resistance: Methicillin-resistant Staphylococcus pseudintermedius (MRSP) is an increasing concern. MRSP is resistant to all beta-lactam antibiotics (penicillins, cephalosporins, carbapenems) and often to multiple other drug classes. Treatment of MRSP pyoderma requires culture and sensitivity testing and may involve:

• Chloramphenicol
• Doxycycline
• Clindamycin (variable susceptibility)
• Aminoglycosides
• Fluoroquinolones (variable susceptibility)
• Rifampin (used in combination therapy)
• Vancomycin (rarely used in veterinary medicine due to cost and resistance concerns)

Topical Therapy

Topical therapy is an essential component of pyoderma management, reducing bacterial burden, removing crusts and exudate, and improving skin barrier function.

Medicated Shampoos: Bathing with medicated shampoos should be performed 2-3 times weekly during the initial treatment phase.

• Chlorhexidine (2-4%): Broad-spectrum antibacterial activity, excellent for superficial pyoderma.
• Benzoyl Peroxide (2.5-3%): Antibacterial, degreasing, and follicular flushing properties. Particularly useful for deep pyoderma and demodicosis.
• Ethyl Lactate: Antibacterial and moisturising properties.
• Ketoconazole or Miconazole: Antifungal activity, useful when Malassezia dermatitis is also present.

Shampoo application instructions: Wet coat thoroughly, apply shampoo, lather well, and leave on for 10-15 minutes before rinsing thoroughly. Repeat application for best results.

Topical Sprays, Wipes, and Lotions: Useful for spot treatment and between baths.

• Chlorhexidine (2%) spray or wipes
• Mupirocin ointment: Effective for localised superficial pyoderma
• Fusidic acid cream: Effective for localised infections
• Silver sulfadiazine cream: Broad-spectrum antibacterial, useful for deep pyoderma and burns

Moisturising and Barrier Repair: Essential fatty acid supplements (omega-3 and omega-6) and ceramide-containing products can help restore skin barrier function.

Treatment of Underlying Causes

Successful long-term management of pyoderma requires identification and treatment of underlying predisposing factors.

Allergic Skin Disease:

• Allergen avoidance (flea control, dietary elimination trials)
• Allergen-specific immunotherapy (desensitisation)
• Antihistamines (cetirizine, loratadine, diphenhydramine)
• Glucocorticoids (prednisolone, triamcinolone) at lowest effective dose
• Oclacitinib (Apoquel): Janus kinase inhibitor for atopic dermatitis
• Lokivetmab (Cytopoint): Canine anti-IL-31 monoclonal antibody
• Cyclosporine (Atopica): Calcineurin inhibitor for refractory cases

Endocrinopathies:

• Hypothyroidism: Levothyroxine supplementation
• Hyperadrenocorticism: Medical therapy (trilostane, mitotane) or surgical management (adrenalectomy, hypophysectomy)

Parasitic Infestations:

• Demodicosis: Isoxazoline treatment (fluralaner, afoxolaner, sarolaner, lotilaner) or amitraz dips
• Scabies: Isoxazoline treatment or selamectin
• Flea control: Year-round flea prevention with isoxazolines or insect growth regulators

Skin Fold Pyoderma:

• Weight loss (for obese dogs)
• Surgical correction (facial fold resection, vulvoplasty, tail amputation)
• Regular cleaning with chlorhexidine wipes

Immunosuppression:

• Reduce or discontinue immunosuppressive medications if possible
• Address underlying disease

Prognosis and Complications

The prognosis for pyoderma depends on the depth of infection, presence of underlying disease, and response to therapy.

Superficial Pyoderma: Excellent prognosis with appropriate antibiotic therapy and management of underlying causes. Most cases resolve within 3-4 weeks. Recurrence is common if underlying allergies or endocrinopathies are not addressed.

Deep Pyoderma: Good to guarded prognosis. Requires prolonged antibiotic therapy (8-12 weeks or longer). Scarring, hyperpigmentation, and permanent alopecia may occur. German Shepherd Dog deep pyoderma carries a guarded prognosis due to the severity and recurrent nature of the disease.

Complications:

• Antibiotic resistance (MRSP)
• Adverse drug reactions (antibiotic-associated diarrhoea, vomiting, hypersensitivity)
• Systemic infection (rare in immunocompetent dogs)
• Scarring and cosmetic defects
• Chronic, recurrent disease

Prevention Strategies

Prevention of pyoderma focuses on maintaining skin health and addressing underlying predisposing factors.

Routine Skin Care:

• Regular grooming and bathing with appropriate products
• Moisturising and barrier repair products for dogs with dry skin
• Prompt attention to skin folds, interdigital spaces, and other high-risk areas

Parasite Control:

• Year-round flea and tick prevention
• Regular screening for demodicosis and scabies in predisposed breeds

Allergy Management:

• Avoidance of known allergens
• Early intervention for allergic flares
• Immunotherapy or medical management as needed

Endocrine Monitoring:

• Regular veterinary check-ups for older dogs
• Annual bloodwork to screen for hypothyroidism and hyperadrenocorticism

Nutrition:

• High-quality, balanced diet
• Omega-3 and omega-6 fatty acid supplementation
• Avoidance of dietary allergens in allergic dogs

Weight Management:

• Maintain ideal body condition
• Weight loss for obese dogs to reduce skin folds and pressure points

Regional Considerations

United States and Canada: Pyoderma is a common presenting complaint in general practice. The prevalence of MRSP varies geographically but is increasing. According to the AVMA and AAHA guidelines, culture and sensitivity testing is recommended for recurrent or refractory cases. Flea control is essential in endemic areas.

Europe: The FVE and EMA emphasise antimicrobial stewardship in veterinary medicine. European guidelines recommend limiting systemic antibiotic use to confirmed bacterial infections and using topical therapy as first-line treatment when possible. MRSP prevalence is higher in some European countries, necessitating culture-guided therapy.

Australia: The AVA and DAFF recommend similar approaches to pyoderma management. Tick paralysis prevention (Ixodes holocyclus) is important in endemic regions. Australian veterinarians must be aware of regional variations in antibiotic resistance patterns.

United Kingdom: The British Small Animal Veterinary Association (BSAVA) provides guidelines for pyoderma management. Antimicrobial stewardship is a priority, with emphasis on topical therapy and targeted systemic antibiotic use.

Frequently Asked Questions

Question: Can pyoderma in dogs spread to humans? Answer: While Staphylococcus pseudintermedius is primarily a canine pathogen, zoonotic transmission to humans is possible, particularly in immunocompromised individuals. Practicing good hygiene, including hand washing after handling affected dogs, is recommended. People with compromised immune systems should avoid direct contact with pyoderma lesions.

Question: How long does it take for pyoderma to heal in dogs? Answer: Superficial pyoderma typically improves within 7-10 days of starting appropriate antibiotic therapy, with complete resolution expected within 3-4 weeks. Deep pyoderma requires longer treatment, often 8-12 weeks or more. Treatment should continue for at least 7-10 days (superficial) or 2-4 weeks (deep) beyond clinical resolution.

Question: Is pyoderma in dogs painful? Answer: Superficial pyoderma is typically pruritic (itchy) rather than painful. Deep pyoderma, particularly furunculosis and cellulitis, can be painful. Dogs with interdigital pyoderma may show lameness or reluctance to walk. Pain management may be necessary in severe cases.

Question: Can diet affect pyoderma in dogs? Answer: Yes, diet can play a significant role. Food allergies can trigger pyoderma in susceptible dogs. Dietary elimination trials are recommended for dogs with recurrent pyoderma and suspected food allergy. Omega-3 and omega-6 fatty acid supplementation may improve skin barrier function and reduce inflammation.

Question: What happens if pyoderma is left untreated in dogs? Answer: Untreated superficial pyoderma can progress to deep pyoderma, which is more severe and difficult to treat. Deep pyoderma can lead to scarring, permanent hair loss, and systemic infection (sepsis) in rare cases. Chronic pyoderma can significantly impact the dog's quality of life.

Question: Can I treat my dog's pyoderma at home? Answer: While topical therapy (medicated shampoos, wipes) can be performed at home, systemic antibiotics require veterinary prescription. Attempting to treat pyoderma without veterinary guidance can lead to inappropriate antibiotic selection, inadequate duration of therapy, and development of antibiotic resistance. Always consult a veterinarian for proper diagnosis and treatment.

Question: How is pyoderma diagnosed in dogs? Answer: Diagnosis is based on clinical examination, cytology (microscopic examination of skin samples), and ruling out underlying causes. Skin scrapings, fungal culture, bacterial culture and sensitivity, bloodwork, and skin biopsy may be necessary in some cases.

Question: What is the difference between pyoderma and hot spots in dogs? Answer: Hot spots (pyotraumatic dermatitis) are a form of surface pyoderma characterised by acute, moist, erythematous lesions that develop rapidly. They are intensely pruritic and painful. Hot spots are often associated with underlying allergies, flea infestation, or ear infections. Treatment involves clipping the area, cleaning, topical therapy, and addressing the underlying cause.

Question: Can dogs get pyoderma from stress? Answer: Stress itself does not directly cause pyoderma, but stress can suppress the immune system and exacerbate underlying conditions such as allergies, making dogs more susceptible to skin infections. Managing stress through environmental enrichment, routine, and behavioural support may help reduce the risk of pyoderma flares.

Question: Is pyoderma contagious between dogs? Answer: Pyoderma is generally not considered highly contagious between healthy dogs. However, Staphylococcus pseudintermedius can be transmitted through direct contact or contaminated objects. Dogs with compromised immune systems or skin barriers may be at higher risk. Good hygiene practices are recommended in multi-dog households.

References

1. Miller WH, Griffin CE, Campbell KL. Muller and Kirk's Small Animal Dermatology. 7th ed. St. Louis, MO: Elsevier; 2013.

2. Hill PB, Lo A, Eden CA, et al. Survey of the prevalence, diagnosis and treatment of dermatological conditions in small animals in general practice. Vet Rec. 2006;158(16):533-539.

3. Bannoehr J, Guardabassi L. Staphylococcus pseudintermedius in the dog: taxonomy, diagnostics, ecology, epidemiology and pathogenicity. Vet Dermatol. 2012;23(4):253-266.

4. Morris DO, Loeffler A, Davis MF, et al. Recommendations for approaches to meticillin-resistant staphylococcal infections of small animals: diagnosis, therapeutic considerations and preventive measures. Vet Dermatol. 2017;28(3):304-e69.

5. Olivry T, DeBoer DJ, Favrot C, et al. Treatment of canine atopic dermatitis: 2015 updated guidelines from the International Committee on Allergic Diseases of Animals (ICADA). Vet Dermatol. 2015;26(2):80-e25.

6. Loeffler A, Lloyd DH. What has changed in canine pyoderma? A narrative review. Vet J. 2018;235:73-82.

7. Beco L, Guaguere E, Lorente Mendez C, et al. Suggested guidelines for using systemic antimicrobials in bacterial skin infections: part 1 - diagnosis based on clinical presentation, cytology and culture. Vet Dermatol. 2013;24(1):121-e30.

8. Beco L, Guaguere E, Lorente Mendez C, et al. Suggested guidelines for using systemic antimicrobials in bacterial skin infections: part 2 - antimicrobial choice, treatment regimens and compliance. Vet Dermatol. 2013;24(1):131-e36.

9. Merck Veterinary Manual. Bacterial Pyoderma in Dogs. Kenilworth, NJ: Merck & Co., Inc.; 2023.

10. American Veterinary Medical Association (AVMA). Antimicrobial Stewardship in Veterinary Medicine. Schaumburg, IL: AVMA; 2023.

11. Australian Veterinary Association (AVA). Guidelines for Veterinary Antimicrobial Use. St Leonards, NSW: AVA; 2023.

12. Federation of Veterinarians of Europe (FVE). Antimicrobial Stewardship Guidelines. Brussels, Belgium: FVE; 2023.

13. VCA Animal Hospitals. Pyoderma in Dogs. Los Angeles, CA: VCA; 2023.

14. DVM360. Canine Pyoderma: A Clinical Approach to Diagnosis and Treatment. 2023.

15. Cornell College of Veterinary Medicine. Canine Skin Infections. Ithaca, NY: Cornell University; 2023.