Isolation and Identification of Pigeion-originated Duck Hepatitis A Virus 1
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摘要: 为对1株鸽源鸭甲肝病毒1型(DHAV-1)进行分离与鉴定,通过细菌分离排除法和病毒分离方法获得致鸭胚死亡病毒(暂命名为FJ-12-20株)。该病毒无血凝活性,可被DHAV-1引物所扩增,但不能被鸭坦布苏病毒、番鸭呼肠孤病毒、番鸭细小病毒和鹅细小病毒特异引物所扩增,病毒液攻击樱桃谷鸭和番鸭可引起死亡,并出现了典型的鸭肝炎病变,重新分离获得病毒株。将DHAV-1特异性扩增产物回收后克隆,序列分析表明FJ-12-20株与参考株DHAV-1的同源率为93.5%~99%,与DHAV-2和DHAV-3参考株的同源率均为78.4%。遗传进化分析表明FJ-12-20株与DHAV-1关系密切,它们在进化树中共处一分支。Abstract: Duck hepatitis A virus 1(DHAV-1),FJ-12-20,was isolated from a dead pigeon in Fujian.The strain,which lacked the hemagglutination activity,was identified by using the specific primers of DHAV-1,against those of the duck Tembusu virus,duck reovirus,duck parvirus and goose parvirus.Some Cherry Valley ducks and Muscovy ducks died after being challenged by the allantoic fluid containing FJ-12-20.Those ducks characterized with overt lesions of duck hepatitis.The virus was also successfully recovered from the infected ducks,and confirmed by reverse transcription-PCR.Sequence analysis revealed a high homology(93.5%-99%) existed between FJ-12-20 and DHAV-1 from GenBank.A significantly lower homology(78.4%),on the other hand,was found between FJ-12-20 and the standard strain of DHAV-2 or DHAV-3.Phylogenetic analysis showed that FJ-12-20 was close to DHAV-1,and all of these viruses could be subdivided into an isolated cluster.
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Key words:
- pigeon-origin /
- duck hepatitis A virus 1 /
- isolation and identification
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