Immune-Mediated Haemolytic Anaemia (IMHA) in Dogs
Immune-Mediated Haemolytic Anaemia (IMHA) is a high-severity autoimmune condition that can affect dogs of all ages and breeds. IMHA is a life-threatening condition in which the immune system destroys the dog's own red blood cells. It can be primary (idiopathic) or secondary to triggers such as drugs, infections, or neoplasia. Mortality rates can reach 40-60% in severe cases. It is documented across 5 breeds, though prevalence and severity can differ significantly between them. It typically becomes apparent at 2-8 years. Early signs to watch for include pale or yellow (icteric) gums, extreme lethargy, rapid breathing, and collapse. When treatment is required, costs are estimated at £3,000-£8,000 depending on severity, location, and the specific intervention needed. This page covers symptoms, treatment options, and preventive steps — along with breed-specific information where available.
Signs & Symptoms
The following symptoms are commonly associated with Immune-Mediated Haemolytic Anaemia (IMHA) in dogs. If your dog displays several of these signs, consult your vet promptly — early diagnosis typically leads to better outcomes.
- Pale or yellow (icteric) gums
- Extreme lethargy
- Rapid breathing
- Collapse
- Dark urine
- Abdominal pain
Treatment Overview
Immunosuppression with high-dose prednisolone is the mainstay; azathioprine, cyclosporine, or mycophenolate are added for refractory cases. Blood transfusions provide life support. Anticoagulants reduce thromboembolism risk.
Typical onset: 2-8 years
Prevention & Screening
While not all cases of Immune-Mediated Haemolytic Anaemia (IMHA) can be prevented, the following steps reduce risk or enable earlier intervention:
- Avoid unnecessary vaccinations in previously affected dogs
- Avoid triggering drugs in known cases
Estimated Treatment Cost
Treatment for Immune-Mediated Haemolytic Anaemia (IMHA) is estimated at £3,000-£8,000, depending on severity, the specific intervention required, and your location. Costs may be higher for surgical procedures or ongoing management. Comprehensive pet insurance covering this condition is strongly recommended.
Breeds Affected by Immune-Mediated Haemolytic Anaemia (IMHA)
The following 5 breeds are documented as being susceptible to Immune-Mediated Haemolytic Anaemia (IMHA). Click any breed to view breed-specific information about this condition, including prevalence and recommended screening.
Looking for more information? Browse all dog health conditions or explore the health guides for in-depth breed care advice.