Immune-mediated hemolytic anemia secondary to bee envenomation developed in 2 dogs. Clinical signs included lethargy, hematuria, ataxia, and seizures; 1 dog died. Clinicopathologic data included nonregenerative anemia, spherocytosis, positive results for Coombs' test, and occult hematuria. Treatment included oral administration of corticosteroids at immunosuppressive dosages and supportive care. The surviving dog initially responded to corticosteroids, but hemolysis recurred as the dosage was tapered. Hemolysis resolved with prolonged administration of corticosteroids. Bee venom contains hyaluronidase, histamines, and hemolysins that cause toxic and hemolytic effects. Envenomation should be considered in any dog with hemolytic anemia in which other causes are ruled out and exposure to bees is known.
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Noble et al. (1999) studied this question.