Infectivity, transmission and pathogenicity of H5 highly pathogenic avian influenza clade 2.3.4.4 (H5N8 and H5N2) United States index viruses in Pekin ducks and Chinese geese
Abstract In late 2014, a H5N8 highly pathogenic avian influenza (HPAI) virus, clade 2.3.4.4, spread by migratory waterfowl into North America reassorting with low pathogenicity AI viruses to produce a H5N2 HPAI virus. Since domestic waterfowl are common backyard poultry frequently in contact with wi...
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| Format: | Article |
| Language: | English |
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BMC
2017-06-01
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| Series: | Veterinary Research |
| Online Access: | http://link.springer.com/article/10.1186/s13567-017-0435-4 |
| _version_ | 1818579771836071936 |
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| author | Mary J. Pantin-Jackwood Mar Costa-Hurtado Kateri Bertran Eric DeJesus Diane Smith David E. Swayne |
| author_facet | Mary J. Pantin-Jackwood Mar Costa-Hurtado Kateri Bertran Eric DeJesus Diane Smith David E. Swayne |
| author_sort | Mary J. Pantin-Jackwood |
| collection | DOAJ |
| description | Abstract In late 2014, a H5N8 highly pathogenic avian influenza (HPAI) virus, clade 2.3.4.4, spread by migratory waterfowl into North America reassorting with low pathogenicity AI viruses to produce a H5N2 HPAI virus. Since domestic waterfowl are common backyard poultry frequently in contact with wild waterfowl, the infectivity, transmissibility, and pathogenicity of the United States H5 HPAI index viruses (H5N8 and H5N2) was investigated in domestic ducks and geese. Ducks infected with the viruses had an increase in body temperature but no or mild clinical signs. Infected geese did not show increase in body temperature and most only had mild clinical signs; however, some geese presented severe neurological signs. Ducks became infected and transmitted the viruses to contacts when inoculated with high virus doses [(104 and 106 50% embryo infective dose (EID50)], but not with a lower dose (102 EID50). Geese inoculated with the H5N8 virus became infected regardless of the virus dose given, and transmitted the virus to direct contacts. Only geese inoculated with the higher doses of the H5N2 and their contacts became infected, indicating differences in infectivity between the two viruses and the two waterfowl species. Geese shed higher titers of virus and for a longer period of time than ducks. In conclusion, the H5 HPAI viruses can infect domestic waterfowl and easily transmit to contact birds, with geese being more susceptible to infection and disease than ducks. The disease is mostly asymptomatic, but infected birds shed virus for several days representing a risk to other poultry species. |
| first_indexed | 2024-12-16T07:07:00Z |
| format | Article |
| id | doaj.art-a135fef221da4c85b9d863d5e4834c64 |
| institution | Directory Open Access Journal |
| issn | 1297-9716 |
| language | English |
| last_indexed | 2024-12-16T07:07:00Z |
| publishDate | 2017-06-01 |
| publisher | BMC |
| record_format | Article |
| series | Veterinary Research |
| spelling | doaj.art-a135fef221da4c85b9d863d5e4834c642022-12-21T22:40:00ZengBMCVeterinary Research1297-97162017-06-0148111410.1186/s13567-017-0435-4Infectivity, transmission and pathogenicity of H5 highly pathogenic avian influenza clade 2.3.4.4 (H5N8 and H5N2) United States index viruses in Pekin ducks and Chinese geeseMary J. Pantin-Jackwood0Mar Costa-Hurtado1Kateri Bertran2Eric DeJesus3Diane Smith4David E. Swayne5Exotic and Emerging Avian Viral Diseases Research Unit, Southeast Poultry Research Laboratory, U.S. National Poultry Research Center, Agricultural Research Service, U.S. Department of AgricultureExotic and Emerging Avian Viral Diseases Research Unit, Southeast Poultry Research Laboratory, U.S. National Poultry Research Center, Agricultural Research Service, U.S. Department of AgricultureExotic and Emerging Avian Viral Diseases Research Unit, Southeast Poultry Research Laboratory, U.S. National Poultry Research Center, Agricultural Research Service, U.S. Department of AgricultureExotic and Emerging Avian Viral Diseases Research Unit, Southeast Poultry Research Laboratory, U.S. National Poultry Research Center, Agricultural Research Service, U.S. Department of AgricultureExotic and Emerging Avian Viral Diseases Research Unit, Southeast Poultry Research Laboratory, U.S. National Poultry Research Center, Agricultural Research Service, U.S. Department of AgricultureExotic and Emerging Avian Viral Diseases Research Unit, Southeast Poultry Research Laboratory, U.S. National Poultry Research Center, Agricultural Research Service, U.S. Department of AgricultureAbstract In late 2014, a H5N8 highly pathogenic avian influenza (HPAI) virus, clade 2.3.4.4, spread by migratory waterfowl into North America reassorting with low pathogenicity AI viruses to produce a H5N2 HPAI virus. Since domestic waterfowl are common backyard poultry frequently in contact with wild waterfowl, the infectivity, transmissibility, and pathogenicity of the United States H5 HPAI index viruses (H5N8 and H5N2) was investigated in domestic ducks and geese. Ducks infected with the viruses had an increase in body temperature but no or mild clinical signs. Infected geese did not show increase in body temperature and most only had mild clinical signs; however, some geese presented severe neurological signs. Ducks became infected and transmitted the viruses to contacts when inoculated with high virus doses [(104 and 106 50% embryo infective dose (EID50)], but not with a lower dose (102 EID50). Geese inoculated with the H5N8 virus became infected regardless of the virus dose given, and transmitted the virus to direct contacts. Only geese inoculated with the higher doses of the H5N2 and their contacts became infected, indicating differences in infectivity between the two viruses and the two waterfowl species. Geese shed higher titers of virus and for a longer period of time than ducks. In conclusion, the H5 HPAI viruses can infect domestic waterfowl and easily transmit to contact birds, with geese being more susceptible to infection and disease than ducks. The disease is mostly asymptomatic, but infected birds shed virus for several days representing a risk to other poultry species.http://link.springer.com/article/10.1186/s13567-017-0435-4 |
| spellingShingle | Mary J. Pantin-Jackwood Mar Costa-Hurtado Kateri Bertran Eric DeJesus Diane Smith David E. Swayne Infectivity, transmission and pathogenicity of H5 highly pathogenic avian influenza clade 2.3.4.4 (H5N8 and H5N2) United States index viruses in Pekin ducks and Chinese geese Veterinary Research |
| title | Infectivity, transmission and pathogenicity of H5 highly pathogenic avian influenza clade 2.3.4.4 (H5N8 and H5N2) United States index viruses in Pekin ducks and Chinese geese |
| title_full | Infectivity, transmission and pathogenicity of H5 highly pathogenic avian influenza clade 2.3.4.4 (H5N8 and H5N2) United States index viruses in Pekin ducks and Chinese geese |
| title_fullStr | Infectivity, transmission and pathogenicity of H5 highly pathogenic avian influenza clade 2.3.4.4 (H5N8 and H5N2) United States index viruses in Pekin ducks and Chinese geese |
| title_full_unstemmed | Infectivity, transmission and pathogenicity of H5 highly pathogenic avian influenza clade 2.3.4.4 (H5N8 and H5N2) United States index viruses in Pekin ducks and Chinese geese |
| title_short | Infectivity, transmission and pathogenicity of H5 highly pathogenic avian influenza clade 2.3.4.4 (H5N8 and H5N2) United States index viruses in Pekin ducks and Chinese geese |
| title_sort | infectivity transmission and pathogenicity of h5 highly pathogenic avian influenza clade 2 3 4 4 h5n8 and h5n2 united states index viruses in pekin ducks and chinese geese |
| url | http://link.springer.com/article/10.1186/s13567-017-0435-4 |
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