6[5]McDougald LR.Anticoccidal drug resistance in the southeastern United States:Polyether,Ionophorous Drugs[J].Avi Dis,1981,25(3):600-609.
7[8]Greif G,Bernd Stephan,Axel Haberkorn.Intraspecific polymorphisms of Eimeria species due to resistance against anticoccidial drugs[J].Parasitology Research,1996,82(8):706 -714.
8[13]Shirely MW.Control of coccidiosis with live vaccines[J].World poultry,1993,8:24-27.
9[14]Tapashi Dasgupta,Eng Hong Lee.A gel delivery system for coccidiosis vaccine:Uniformity of distribution of oocysts[J].Can Vet J,2000,41:613-616.