The retention of Babesia bigemina infection by Boophilus decoloratus exposed to imidocarb dipropionate during engorgement.

Babesia bigemina was retained in the vector Boophilus decoloratus for a complete generation despite the use of the babesicide, imidocarp dipropionate, to prevent reinfection. This drug did not sterilize ticks of the B. bigemina infection as has been suggested for B. bovis.