| pathogenesis of eimeria praecox in chickens: virulence of field strains compared with laboratory strains of e. praecox and eimeria acervulina. | the pathogenesis in chickens of the apicomplexan eimeria praecox was compared with that of eimeria acervulina, using intestinal lesions, mucosal integrity, body weight gain (bwg) and the feed conversion ratio (fcr) as criteria. characteristics of each species were described by combinations of polymerase chain reaction assays and classic parasitological signs. there were considerable overlaps in lengths, breadths, shape indices and volumes of the oocysts of each species. both species caused stati ... | 2009 | 19937523 |