Human albumin in the critically ill dog: late complications
6-year-old Pointer operated on 12 days ago for septic peritonitis. He received 25% human albumin for severe hypoalbuminaemia and was discharged in good condition on amoxicillin-clavulanate. He now has lethargy, facial and limb oedema, shifting lameness in several limbs and erythematous, exudative skin lesions in dependent areas.
| Parameter | Result | Reference |
|---|---|---|
| Temperature | 39.6 °C | 38.0–39.2 |
| Albumin | 2.3 g/dL | 2.6–4.0 |
| Creatinine | 2.4 mg/dL | 0.5–1.5 |
| UPC | 2.8 | < 0.5 |
| Synovial fluid (carpus) | Non-degenerate neutrophils | — |
What is the most likely cause?
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A. Recurrent peritonitis with sepsis and septic vasculitis
It must be ruled out with ultrasound and fluid analysis, but polyarthritis, cutaneous vasculitis and proteinuria two weeks after albumin fit an immune-mediated reaction better.
B. Cutaneous drug reaction to the postoperative amoxicillin-clavulanate
A cutaneous reaction to beta-lactams does not explain the polyarthritis, proteinuria or azotaemia, nor the timing relative to the albumin.
C. Thromboembolism from sepsis-associated hypercoagulability
Thromboembolism causes focal signs depending on the vessel affected, not generalised oedema, polyarthritis and vasculitic skin lesions.
D. Type III hypersensitivity to human albumin
Correct. Dogs form antibodies against human albumin; 1–3 weeks later vasculitis, oedema, polyarthritis, glomerulopathy and immune-complex kidney injury can appear, sometimes fatally. A second dose can cause anaphylaxis.
lightbulb Key takeaway
Reserve human albumin for severe hypoalbuminaemia with clear benefit, record its administration and never repeat it. Prefer canine albumin or plasma when available. Warn the owner about late signs (oedema, lameness, skin lesions) so they seek help as soon as they appear.
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Updated: November 1, 2026 · Educational content for veterinary professionals. It does not replace current clinical guidelines or the judgement of the attending veterinarian.