PRESUMPTIVE RED MAPLE (ACER-RUBRUM) TOXICOSIS IN GREVY ZEBRA (EQUUS-GREVYI)

Two female Grevy's zebras (Equus grevyi), one juvenile and one adult, were treated for hemolytic anemia. The juvenile survived, but the adul t animal, which also had methemoglobinemia, was euthanized after it fa iled to recover from anesthesia. Significant pathologic findings in th e adult zebra included generalized icterus, hemoglobinuric nephrosis, and paracentral hepatic necrosis. Serum titers for known infectious ca uses of anemia were negative. Examination of the zebra holding areas r evealed two hybrid red maple (Acer sp.) trees. There was no known expo sure to other hemolytic agents. This is the first report of probable r ed maple-induced hemolysis in zebra.