Exhibit A showed edematous lesions on the membrane, hemorrhages and thickening of CAM, while exhibit B showed an un-inoculated chick embryo with normal CAM. 

Amplification of CE virus-specific B2L gene by PCR. Exhibits A and B demonstrated PCR positive samples from sheep and goats respectively. Lane M & L are DNAmolecular weight markers (lanes M=1kb, L=100bp), lanes 1-11 and lanes 1-13 are amplified PCR products from CE virus-positive samples, Lanes N is a negative control.