Pathogenicity and transmission studies of H7N7 avian influenza virus isolated from feces of magpie origin in chickens and magpie

被引：8

作者：

Kim, Min-Chul ^{[1
]}

Jeong, Ok-Mi ^{[1
]}

Kang, Hyun-Mi ^{[1
]}

Paek, Mi-Ra ^{[1
]}

Kwon, Ji-Sun ^{[1
]}

Song, Chang-Seon ^{[2
]}

Kwon, Yong-Kuk ^{[1
]}

Lee, Jung-Goo ^{[3
]}

Kwon, Jun-Hun ^{[1
]}

Lee, Youn-Jeong ^{[1
]}

机构：

[1] Natl Vet Res & Quarantine Serv, Avian Dis Div, Anyang 430757, Gyeonggi Do, South Korea

[2] Konkuk Univ, Avian Dis Lab, Coll Vet Med, Seoul 143701, South Korea

[3] Inst Publ Hlth & Environm, Vet Serv Lab, Inchon 400102, South Korea

来源：

VETERINARY MICROBIOLOGY | 2010年 / 141卷 / 3-4期

关键词：

H7N7 avian influenza virus; Magpie; Transmission; Wild resident bird; Active surveillance; Magpie feces; WILD BIRDS; COMMERCIAL POULTRY; PASSERINE BIRDS; A-VIRUS; HEMAGGLUTININ; EMERGENCE; GENES; IDENTIFICATION; RECOMBINATION; SURVEILLANCE;

D O I：

10.1016/j.vetmic.2009.09.027

中图分类号：

Q93 [微生物学];

学科分类号：

071005 ; 100705 ;

摘要：

An H7N7 avian influenza virus [A/Magpie/Kr/YJD174/07 (H7N7); Mp/Kr/07 virus] was isolated from magpie feces in the north-western area (Youngjongdo) of South Korea and identified as low pathogenicity by intravenous pathogenic index and amino acid sequence of cleavage site. In genetic analysis, the genome of the Mp/Kr/07 virus was the same as those of two other H7N7 viruses isolated from the Mallard ducks in Ganghwa, 5 km north of Youngjongdo, and grouped under the H7-subtype Eurasian linage with the highest similarity to recent two domestic duck isolates in South Korea. In vivo studies of the chickens and magpies, the Mp/Kr/07 virus, though did not caused any clinical signs with histological changes, could replicate in the oropharynx and cloaca of the chickens and was efficiently transmitted to contact chickens. However, the virus was restrictively identified in oropharynx of the magpies and was not spread to magpies by direct contact. These results suggest that magpie are not a biological amplifier of influenza virus and thus play a minimal role in virus transmission as intermediate host. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：268 / 274

页数：7

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