The length of ORF3a, ORF5a, ORF5b and ORF of N genes were composed of 174 bp, 198 bp, 249 bp and 1230 bp respectively except CK/CH/LSD/031, ORF3a of which contained 144 bp.

• 除CK/CH/LSD/031株ORF3a核苷酸序列由144 bp组成外,其分离株ORF3a、ORF5a、ORF5b和N基因ORF序列长度比较保守,分别由174 bp、198 bp、249 bp和1230 bp组成,与Beaudette株相应区域基因序列长度一致。