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Acute phase proteins in grass sickness (equine dysautonomia)
Authors:EM Milne  DL Doxey  JE Kent  A Pemberton
Institution:Department of Veterinary Clinical Studies, Royal (Dick) School of Veterinary Studies, Roslin, Midlothian.
Abstract:Four acute phase proteins were assayed in the serum of normal horses and those with acute, subacute and chronic grass sickness, colic and inflammatory conditions, in order to investigate their diagnostic value in grass sickness. The grass sickness and inflammation group had a significantly increased haptoglobin concentration (P less than 0.01-P less than 0.001). Orosomucoid was elevated in acute, subacute and chronic grass sickness and inflammation (P less than 0.001, P less than 0.001, P less than 0.05 and P less than 0.05, respectively). Highest concentrations of haptoglobin and orosomucoid were recorded in subacute grass sickness. Ceruloplasmin was significantly higher in acute grass sickness cases than all other groups except the colic group (P less than 0.05-P less than 0.01). alpha 2-macroglobulin was significantly higher in acute grass sickness than normal, colic and chronic grass sickness cases (P less than 0.01, P less than 0.05 and P less than 0.05). The time scale of changes suggests that the stimulus to haptoglobin and orosomucoid synthesis occurs at the onset of clinical signs whereas the increase in ceruloplasmin and alpha 2-macroglobulin is more likely to reflect haemoconcentration.
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