Cloning and Expression of the Haemagglutinin Protein Gene of Canine Distemper Virus Strain NJ-15 and Screening CpG Oligodeoxynucleotides with Strong Immunostimulatory Activity to B Cell on Canine in Vitro by ELISA

• 犬瘟热病毒南京株（NJ-15）H基因的克隆、表达以及刺激犬B淋巴细胞分泌IgM的最佳CpG基序的体外筛选