What Is IMHA and How Did My Cat Get It?

Immune-mediated hemolytic anemia (IMHA) is a condition where the cat’s immune system turns against itself and attacks the patient’s own red blood cells. The immune system’s antibodies (blood proteins that are designed to counteract substances the body recognizes as alien, such as viruses and bacteria) target red blood cells for destruction.

IMHA is a serious condition with a high mortality rate. Patients are often unstable, and treatment can be lengthy and costly. Cats who are susceptible to I...