A vaccine strategy against Babesia divergens bovine babesiosis was suc
cessfully developed after perfecting of an efficient in vitro culture.
Crude supernatants and purified fractions were able to induce a vacci
ne protection in gerbils against B. divergens infection. More, superna
tants induced an effective vaccine protection in cattle. The role of B
. divergens exoantigens of 17, 37, 46, 70 and 90 kDa in the developmen
t of the immune response was clearly demonstrated in gerbils, cattle,
and man.