Neonatal Isoerythrolysis: Foal Jaundice
Neonatal isoerythrolysis (NI) is caused by an incompatibility of blood types between a mare and her foal. If a foal inherits from its sire a red cell factor (antigen) that the mare lacks, the mare may develop antibodies to that antigen. There is no harm to the foal in utero, as there is no comingling of the mare’s blood with that of the fetus. However, these antibodies will be present in