Foal Neonatal Isoerythrolysis (NI) is an alloimmune hemolytic disease occurring in newborn foals when maternally derived antibodies, ingested through colostrum, target and destroy the foal’s red blood cells. It results from blood type incompatibility between the mare and foal, typically involving Aa and Qa erythrocyte antigens. Affected foals appear normal at birth but develop progressive anemia, icterus, and weakness within hours to days. Early recognition, appropriate testing, and prompt intervention are critical for survival.

Purpura hemorrhagica is an aseptic necrotizing vasculitis primarily linked to S. equi infection or antigens

This is placeholder text. To change this content, double-click on the element and click Change Content.