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Blood types

Blood type is particularly important in blood transfusion and in certain breeding combinations. Correct testing can prevent serious problems in newborn kittens.

Illustration of a Sacred Birman being examined at the vet
Illustration for the topic – not a photograph or a historical source.

Cats mainly have blood types A, B and AB. Distribution varies between breeds and populations. For transfusion and breeding it is important to know the individual cat’s blood type rather than guessing from the breed.

Illustration of a Sacred Birman being examined at the vet
A small letter with major importanceBlood type is particularly important in breeding and transfusion and should be known whenever it may have practical consequences.
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Neonatal isoerythrolysis

Illustration of a Sacred Birman being examined at the vet
AI-illustration

The problem can arise when a queen with blood type B has kittens with blood type A or AB. The kittens may absorb antibodies through colostrum that attack their own red blood cells. This can cause severe anaemia and, in the worst cases, death.

Prevention

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AI-illustration

Blood typing of breeding cats makes it possible to identify risky combinations in advance. If a risk mating is carried out, there should be a specific veterinary plan for managing the kittens immediately after birth.

Transfusion

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AI-illustration

For blood transfusion, correct blood typing and crossmatching are essential. A severe transfusion reaction can occur if donor and recipient are incompatible.

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Populations change. Historical studies of blood-type distribution in Birmans can be interesting, but they cannot replace testing of the individual cat.

Purpose: This page explains the principle. When planning a mating with blood type problems, you should have a specific agreement with your veterinarian.