Monitoring of Usutu virus activity and spread by using dead bird surveillance in Austria, 2003-2005
Monitoring of Usutu virus activity and spread by using dead bird surveillance in Austria, 2003-2005
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DOI：
10.1016/j.vetmic.2007.01.029
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发表时间：
2007-06-21
影响因子：
3.3
通讯作者：
Weissenboeck, H.
中科院分区：
文献类型：
--
作者：
Chvala, S.;Bakonyi, T.;Weissenboeck, H.
自2001年出现以来，奥地利的禽流感病毒一直导致禽类死亡。在2003年和2005年之间，共504只死禽进行了逆转录-聚合酶链反应和免疫组织化学检查，分别存在的病毒核酸和抗原。2003年，属于5个不同物种的92只鸟（共177只鸟）呈阳性，而2004年，只有11只鸟（共224只鸟）呈阳性，2005年，4只鸟（共103只鸟）呈阳性，均为黑鹂（Turdus merula）。在监测期间，病毒已从最初出现和传播的地区，即维也纳周围地区，传播到下奥地利州、布尔根兰州和施蒂里亚州的大片地区。然而，与乌苏图病毒相关的禽类死亡的绝对数量在这些年中显著下降。此外，组织中病毒含量低的禽类比例不断增加，这可能表明群体免疫力正在发展。(c)2007 Elsevier B. V.保留所有权利。
Usutu virus has been causing avian mortality in Austria since its emergence in 2001. Between 2003 and 2005 a total of 504 dead birds were examined by reverse-transcriptase polymerase chain reaction and immunohistochemistry for the presence of Usutu virus nucleic acid and antigen, respectively. In 2003, 92 birds (out of 177 birds) belonging to five different species were positive, while in 2004, only 11 (of 224) birds, and in 2005, 4 (of 103) birds proved positive, all of which were blackbirds (Turdus merula). Within the surveillance period the virus had spread from its initial area of emergence and circulation, the surroundings of Vienna, to large areas of the federal states of Lower Austria, Burgenland and Styria. However, the absolute numbers of usutu virus associated avian deaths declined significantly during the course of the years. In addition, the proportion of birds with low amounts of virus in their tissues increased continuously, which may indicate developing herd immunity. (c) 2007 Elsevier B.V. All rights reserved.