||Cat blood typing is used to determine the cat’s specific blood type before a transfusion. An animal is transfused with type specific blood to prevent a transfusion reaction. Transfusion reactions can cause serious illness or death. Cats have three blood types (A, B, and AB). Most cats (>99%) are blood type A. Type B cats have a natural occurring antibody to blood type A. Some purebred breeds have a high incidence of blood type B (17-59%). When cats with type B are transfused with type A RBCs, an acute transfusion reaction can occur. This procedure is performed on a specially designed blood typing card manufactured exclusively in our laboratory. Presence or absence of agglutination in the test wells of the card determine blood type, A, B, or AB.