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Characterization of an H5N1 avian influenza virus from Taiwan.
Vet Microbiol. 2007 Oct 06; 124(3-4):193-201.VM

Abstract

In 2003, an avian influenza (AI) virus of H5N1 subtype (A/Duck/China/E319-2/03; Dk/CHN/E319-2/03) was isolated from a smuggled duck in Kinmen Island of Taiwan. Phylogenetic analysis and pairwise comparison of nucleotide and amino acid sequences revealed that the virus displayed high similarity to the H5N1 viruses circulating in Asia during 2004 and 2005. The hemagglutinin (HA) protein of the virus contained multiple basic amino acid residues (-RERRRKR-) adjacent to the cleavage site between the HA1 and HA2 domains, showing the highly pathogenic (HP) characteristics. The HP phenotype was confirmed by experimental infection of chickens, which led up to 100% mortality within 24-72h postinfection. The virus replicated equally well in the majority of organs of the infected chickens with titers ranging from 10(7.5) to 10(4.7) 50% embryo lethal dose (ELD50) per gram of tissue. In a mouse model the virus exhibits low pathogenic characteristics with a lethal infection observed only after applying high inoculating dose (>or=10(7.6) ELD50) of the virus. The infectious virus particles were recovered only from the pulmonary system including trachea and lungs. Our study suggests that ducks infected with H5N1 AIV of HPAI pathotype showing no disease signs can carry the virus silently and that bird smuggling represent a serious risk for H5N1 HPAI transmission.

Authors+Show Affiliations

Animal Health Research Institute, Council of Agriculture, 376 Chung-Cheng Road, Tamsui, Taipei 251, Taiwan.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

17512143

Citation

Lee, M S., et al. "Characterization of an H5N1 Avian Influenza Virus From Taiwan." Veterinary Microbiology, vol. 124, no. 3-4, 2007, pp. 193-201.
Lee MS, Deng MC, Lin YJ, et al. Characterization of an H5N1 avian influenza virus from Taiwan. Vet Microbiol. 2007;124(3-4):193-201.
Lee, M. S., Deng, M. C., Lin, Y. J., Chang, C. Y., Shieh, H. K., Shiau, J. Z., & Huang, C. C. (2007). Characterization of an H5N1 avian influenza virus from Taiwan. Veterinary Microbiology, 124(3-4), 193-201.
Lee MS, et al. Characterization of an H5N1 Avian Influenza Virus From Taiwan. Vet Microbiol. 2007 Oct 6;124(3-4):193-201. PubMed PMID: 17512143.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Characterization of an H5N1 avian influenza virus from Taiwan. AU - Lee,M S, AU - Deng,M C, AU - Lin,Y J, AU - Chang,C Y, AU - Shieh,Happy K, AU - Shiau,J Z, AU - Huang,C C, Y1 - 2007/04/08/ PY - 2007/02/05/received PY - 2007/04/03/revised PY - 2007/04/05/accepted PY - 2007/5/22/pubmed PY - 2008/1/16/medline PY - 2007/5/22/entrez SP - 193 EP - 201 JF - Veterinary microbiology JO - Vet Microbiol VL - 124 IS - 3-4 N2 - In 2003, an avian influenza (AI) virus of H5N1 subtype (A/Duck/China/E319-2/03; Dk/CHN/E319-2/03) was isolated from a smuggled duck in Kinmen Island of Taiwan. Phylogenetic analysis and pairwise comparison of nucleotide and amino acid sequences revealed that the virus displayed high similarity to the H5N1 viruses circulating in Asia during 2004 and 2005. The hemagglutinin (HA) protein of the virus contained multiple basic amino acid residues (-RERRRKR-) adjacent to the cleavage site between the HA1 and HA2 domains, showing the highly pathogenic (HP) characteristics. The HP phenotype was confirmed by experimental infection of chickens, which led up to 100% mortality within 24-72h postinfection. The virus replicated equally well in the majority of organs of the infected chickens with titers ranging from 10(7.5) to 10(4.7) 50% embryo lethal dose (ELD50) per gram of tissue. In a mouse model the virus exhibits low pathogenic characteristics with a lethal infection observed only after applying high inoculating dose (>or=10(7.6) ELD50) of the virus. The infectious virus particles were recovered only from the pulmonary system including trachea and lungs. Our study suggests that ducks infected with H5N1 AIV of HPAI pathotype showing no disease signs can carry the virus silently and that bird smuggling represent a serious risk for H5N1 HPAI transmission. SN - 0378-1135 UR - https://www.unboundmedicine.com/medline/citation/17512143/Characterization_of_an_H5N1_avian_influenza_virus_from_Taiwan_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0378-1135(07)00188-5 DB - PRIME DP - Unbound Medicine ER -