Babesia bovis (Argentina): analysis of paracoagulation proteins in acutely infected cattle.

The proteins in plasma and serum from cattle infected with Babesia bovis that react with protamine sulphate and ethanol have been characterized. Their sizes and chain structures suggest they are intermediates in the conversion of fibrinogen to cross-linked fibrin. In addition, comparison with reference proteins and in vitro systems strongly indicate the proteins are, in the main, the products of thrombin activation in vivo and not those of fibrinolysis.