Multiple small-intestine intussusceptions: a complication of purpura haemorrhagica in a horse.

A Belgian draft horse stallion presented with classical signs of purpura haemorrhagica: oedema of the distal limbs, ventral abdomen and head, ecchymotic haemorrhage of mucous membranes, epistaxis, fever, lethargy, reluctance to move, and anorexia. Serum chemistry revealed a highly elevated gamma-globulin fraction. Streptococcal lymphadenitis (strangles) had been present on a neighbouring farm in the past few months. After an initial positive response to therapy with benzylpenicillin, flunixin and dexamethasone, the horse's condition deteriorated suddenly on day 4 of hospitalization, with signs of severe endotoxaemia and small-intestine obstruction. The horse was euthanized because of its poor prognosis and because of economic considerations. On necropsy, large serosal haemorrhages in the small and large intestine and multiple jejunojejunal intussusceptions were found. Intussusception is a well-known complication in children with Henoch-Schonlein purpura, a human autoimmune disease resembling purpura haemorrhagica in horses. To the author's knowledge, this is the first report to describe intussusception as a complication of purpura haemorrhagica in a horse.