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==Pathogenesis==
 
==Pathogenesis==
 
===Feline neonatal isoerythrolysis===
 
===Feline neonatal isoerythrolysis===
Although feline neonatal isoerythrolysis (FNA) is rare, the mortality associated with it is high. Cats have three main blood types, type A, type B and type AB. Cats with type A red blood cell antigens have weak anti-B antibodies, and cats with type B red blood cell antigens have strong anti-A antibodies. FNI develops when type B blood mothers mate with type A tomcats. FNI affects the type A (and rarely the type AB) kitten born from a type B mother following ingestion of maternal colostrum containint anti-A antibodies.  
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Although feline neonatal isoerythrolysis (FNA) is rare, the mortality associated with it is high. Cats have three main blood types, type A, type B and type AB. Worldwide, the most common blood type in cats is type A.
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Queens with type B blood have high levels of naturally occurring alloantibodies to type A blood. FNI develops when type B blood mothers mate with type A tomcats. FNI affects the type A (and rarely the type AB) kitten born from a type B mother following ingestion of maternal colostrum containing anti-A antibodies.  
    
===Equine neonatal isoerythrolysis===
 
===Equine neonatal isoerythrolysis===
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