进境台湾信鸽中检出新城疫病

１９９７年６月,广东省某公司从台湾引进信鸽２００羽,隔离检疫期间,鸽陆续发病死亡,死亡率达４３５％。经临床检查、病理剖检、血清学试验及病毒分离、致病试验等,确诊为鸽新城疫。根据《中华人民共和国进出境动植物检疫法》有关规定,白云机场动植物检疫局已对该批信鸽进行全群扑杀并销毁尸体。     

Molecular characterization of a pigeon paramyxovirus type 1 virus isolated from Eurasian collared doves in Iran, 2017

In September 2017, an outbreak with high mortality, which showed the typical signs of ND, occurred among a flock of more than 2000 Eurasian collared doves in Konarak, southeast of Iran. A confirmed pigeon paramyxovirus type 1 strain was isolated from the brain tissues of the dead doves. The isolate, which was called Pigeon/Iran/Konarak/Barin/2017, was classified as a highly velogenic NDV. Complete genome sequencing and phylogenetic analysis showed that the isolate belonged to subgenotype XXI.2, which has never been reported from Iran before. The isolate had the highest homology (96.15%) with early 2010s Italian isolates. Further studies will be required to understand the diversity better.     

鸽新城疫病毒及鸽痘病毒血凝特性及HA试验技术参数研究

为研究鸽新城疫病毒(PNDV)和鸽痘病毒(PPV)的血凝特性,同时为2种病毒的血凝试验(HA试验)提出技术参数,分别采用鸡和鸽红血细胞(RBC),在不同反应介质和条件下进行病毒血凝试验。结果表明:①PNDV既能凝集鸡RBC,又能凝集鸽RBC,而PPV只凝集鸡RBC;②PNDV对0.5%鸡RBC血凝价比对1%鸡RBC血凝价高1~2个稀释度,而PPV对0.5%鸡RBC血凝价比对1%鸡RBC血凝价高5个稀释度;③PNDV和PPV对鸡RBC的HA凝集强度呈线性变化,而PNDV对鸽RBC的HA凝集强度呈非线性变化;④进行PNDV和PPV的HA试验的理想技术参数为:用0.5%鸡RBC,以0.89%生理盐水或pH 7.4 PBS为反应介质,PNDV于37℃作用30 m in时转至室温观察,重复观察应于35 m in内结束,而PPV应于37℃作用30 m in观察,观察后迅速放回37℃,重复观察应于10 m in内结束。