8Tomley F M,Billington K J,Bumstead J M,et al.EtMIC4:a mi-croneme protein from Eimeria tenella that contains tandem arrays of epidermal growth factor-like repeats and thrombospendin type-I re-peats[J].Int J Parasitol,2001,31:1303-1310.
9Chapman H D,Cherry T E,Danforth H D,at al.Sustainable coc-cidiosis eontorl in poultry production:the role of live vaccines[J].Int J Parasitol,2002,32:617-629.