Dog Immune-Mediated Neutropenia and Bone Marrow Suppression

Immune-mediated destruction of white blood cells leaves dogs dangerously susceptible to infection and requires prompt immunosuppressive treatment.

Key Facts

Immune-mediated neutropenia occurs when the immune system attacks and destroys neutrophils, the primary infection-fighting white blood cells
Neutrophil counts below 1,000 cells/uL create serious infection risk; below 500 creates severe risk
The condition may occur alone or alongside other immune-mediated diseases (IMHA, IMT) as Evans syndrome
Clinical signs include fever, lethargy, and signs of bacterial infection such as oral or skin ulcers
Diagnosis requires CBC showing severe neutropenia with exclusion of drug-induced and infectious causes
Treatment involves immunosuppression with prednisone and often additional agents while providing antibiotic coverage
Recovery of neutrophil counts may take weeks and close monitoring is required during this period

Welfare Considerations

Dogs with severe neutropenia are essentially defenseless against bacterial infection - organisms that are normally harmless can cause life-threatening sepsis. The vulnerability period between diagnosis and immunosuppressive response is acutely dangerous. Hospitalization with antibiotic coverage, isolation from infection sources, and intensive monitoring protects dogs through this period of extreme immune vulnerability.

What You Can Do

Seek emergency veterinary care for any dog with fever and known or suspected blood cell disorders
Maintain strict infection prevention during treatment - avoid dog parks and contact with potentially infectious animals
Complete antibiotic courses as prescribed alongside immunosuppression
Monitor for recurrence through regular CBCs after treatment is tapered
Inform your vet of any new signs of infection immediately during the recovery period