2Chapman H D, Cherry T E, Danforth H D, et al. Sustainable coccidio- sis control in poultry production:The role of live vaccines [ J ]. Int J Par- asito1,2002, ( 32 ) :617 - 629.
9McDougald L R,Fuller L,Seolis J. Drug sensnivity of isolates of 99 isolates of eoecidial from broiler farms [J]. Avian Dis, 1986,30(4) : 690-694.
10Chapman H D,Cherry T E,Danforth H D,et al. Sustainable coceidiosis control in poultry production: The role of live vaccines[J].Int J Parasitol, 2002,32: 617- 629.