Investigation of outbreaks of highly pathogenic H5N1 avian influenza in waterfowl and wild birds in Hong Kong in late 2002
Investigation of outbreaks of highly pathogenic H5N1 avian influenza in waterfowl and wild birds in Hong Kong in late 2002
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DOI：
10.1080/03079450400003601
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发表时间：
2004-10-01
期刊：
影响因子：
2.8
通讯作者：
Peiris, JSM
中科院分区：
文献类型：
--
作者：
Ellis, TM;Bousfield, RB;Peiris, JSM
高致病性H5N1禽流感曾于1997年、2001年在香港的鸡只和其他鸡类家禽中暴发，并在2002年和2003年两次爆发。鸡类禽鸟死亡率高，但家禽或野生水禽或其他野生禽鸟则未见高死亡率，直至2002年底，高致病性H5N1禽流感在香港两个水禽公园的水禽(鹅、鸭和天鹅)、圈养大火烈鸟(凤凰)和其他野生禽鸟(小白鹭)以及两只野生苍鹭(Ardea Cinerea)和一只黑嘴鸥(Larus Ridibundus)身上出现。在第二次暴发期间，还从一只死野鸽(Columba Livia)和一只死树雀(Passer Montanus)身上分离到H5N1禽流感病毒。第一次水禽暴发在第二次暴发开始前一周通过立即严格的检疫和人口减少得到控制。为第二次暴发实施的控制措施包括严格隔离、扑杀、增加卫生设施和接种疫苗。在发生第二次水禽疫情的同时，一些活禽市场也出现了鸡类禽类疫情，在第二次水禽公园爆发一周后，在一家养鸡场发现了感染，同一天发现了第二例灰鹭病例。随后的病毒监测显示，疫情已得到控制。
Outbreaks of highly pathogenic H5N1 avian influenza have occurred in Hong Kong in chickens and other gallinaceous poultry in 1997, 2001, twice in 2002 and 2003. High mortality rates were seen in gallinaceous birds but not in domestic or wild waterfowl or other wild birds until late 2002 when highly pathogenic H5N1 avian influenza occurred in waterfowl (geese, ducks and swans), captive Greater Flamingo (Phoenicopterus ruber) and other wild birds (Little Egret Egretta garzetta) at two waterfowl parks and from two dead wild Grey Heron (Ardea cinerea) and a Black-headed Gull (Larus ridibundus) in Hong Kong. H5N1 avian influenza virus was also isolated from a dead feral pigeon (Columba livia ) and a dead tree sparrow (Passer montanus) during the second outbreak. The first waterfowl outbreak was controlled by immediate strict quarantine and depopulation 1 week before the second outbreak commenced. Control measures implemented for the second outbreak included strict isolation, culling, increased sanitation and vaccination. Outbreaks in gallinaceous birds occurred in some live poultry markets concurrently with the second waterfowl outbreak, and infection on a chicken farm was detected 1 week after the second waterfowl park outbreak was detected, on the same day the second grey heron case was detected. Subsequent virus surveillance showed the outbreaks had been contained.