[Objective] Infectious bursal disease （IBD） is a highly contagious immuno- suppressive disease caused by infectious bursal disease virus （IBDV）. IBDV is ge- netically prone to mutation, which results in challenges...
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[Objective] Infectious bursal disease （IBD） is a highly contagious immuno- suppressive disease caused by infectious bursal disease virus （IBDV）. IBDV is ge- netically prone to mutation, which results in challenges to the disease prevention and control. Thus, it is necessary to continuously monitor the prevalence of IBDV. [Method] 36 IBDVs were identified from ten provinces in China from 2009 to 2012. Partial fragments of VP2, including the hypervariable region （HVR）, from new iso- lates were sequenced and analyzed through comparisons with published sequences of IBDV, including 18 strains isolated previously by our lab and 24 reference strains from China and around the world. [Result] Phylogenetic analysis showed a co-exis- tence of IBDV strains belonging to classic, variant, attenuated, and very virulent IB- DV （wlBDV） in China. wlBDVs remain the predominant strains in China and the new subgroup was emerging. Alignment analysis revealed several distinct amino acid mutations that might be involved in virulence or antigenicity variation. [Conclu- sion] The results offered evolutionary clues showing the emerging trend of obvious variations and diversity of IBDV in major poultry-producing regions of China particu- larly in recent years. These findings will contribute to a better understanding of the genetic evolution of IBDV.
为筛选具有临床诊断价值的副猪嗜血杆菌(***)单克隆抗体(MAb),本研究采用***5型强毒株(HPS-5)免疫BALB/c小鼠,利用常规细胞融合技术制备了1株稳定分泌MAb的杂交瘤细胞株.Western blot 结果表明该MAb能够特异性识别所有***标准菌株;免疫...
详细信息
为筛选具有临床诊断价值的副猪嗜血杆菌(***)单克隆抗体(MAb),本研究采用***5型强毒株(HPS-5)免疫BALB/c小鼠,利用常规细胞融合技术制备了1株稳定分泌MAb的杂交瘤细胞株.Western blot 结果表明该MAb能够特异性识别所有***标准菌株;免疫沉淀技术与蛋白质谱分析显示该MAb所识别蛋白为ATP结合盒转运蛋白(ABCT)家族的寡肽透过酶(OppA);利用MAb对噬茵体12肽库进行淘选,8个阳性噬菌体克隆展示有"KTPAE-R"保守序列,对应于*** SH29755株和SH0165株的469位～475位的氨基酸残基.对OppA氨基酸序列比对结果表明***与其它10种猪常见细菌病病原序列一致性为9.1％～74.5％,本研究结果为进一步研究***感染的病原学诊断建立了良好的基础.
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