Serum carboxypeptidase B levels during acute and mild Babesia divergens infections of adult cattle.

Serum carboxypeptidase B levels were measured in adult cows suffering from both acute and mild babesiosis caused by Babesia divergens. In severe infections serum carboxypeptidase B levels started to fall three days after infection and were significantly lower than both preinfection levels and those of mildly affected cows for a period of 10 days starting at the time of maximum parasitaemia. Normal levels were regained on the 23rd day after infection.