Feline Hemophilia B

Feline Hemophilia B is a hereditary disease concerning clotting factor IX. It has been reported in British Shorthair cats. The deficiency results in excessive bleeding after injury or surgery. A platelet plug forms ordinarily but a fibrin clot does not form to replace the platelet plug which dissipates.

The disease is recessive X-chromosome linked, which means heterozygous females do not have symptoms but transmit to male offspring. The treatment is a blood transfusion or plasma until the bleeding stops. Breeders will test for Factor IX in the cats to eliminate cats carrying the defect.

Hemophilia A has been seen in three unrelated cats (non-purebred).

Feline Hemophilia B to Cat Illness Symptoms

Source:

1. Medical, Genetic & Behavioral Aspects of Purebred Cats
2. PubMed