The most frequent mutations were present in the collagenase equivalent ( COE ) and epitope regions of the spike gene of the PEDVs
currently circulating in the field .
The most frequent mutations were present in the collagenase equivalent ( COE ) and epitope regions of the spike gene of the PEDVs currently circulating in the field .
The most frequent mutations were present in the collagenase equivalent ( COE ) and epitope regions of the spike gene of the PEDVs currently circulating in the field .