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Volume 21, Number 2—February 2015

Novel Reassortant Influenza A(H5N8) Viruses among Inoculated Domestic and Wild Ducks, South Korea, 2014

Hyun-Mi Kang, Eun-Kyoung Lee, Byung-Min Song, Jipseol Jeong, Jun-Gu Choi, Joojin Jeong, Oun-Kyong Moon, Hachung Yoon, Youngmi Cho, Young-Myong Kang, Hee-Soo Lee, and Youn-Jeong LeeComments to Author 
Author affiliations: Animal and Plant Quarantine Agency, Anyang, South Korea

Main Article

Table 1

Weight loss, morbidity, mortality rate, and HI titers of domestic ducks exposed to 3 strains of H5N8 influenza virus*

Virus Group Illness† Weight loss, %‡ Deaths (%) HI titer§ (log2, mean±SD)
A/breeder duck/Kr/Gochang1/2014 (H5N8)
Inoculated 3/5 32 1/5 (20) 2/5 (5.5 ± 0.7)
1/3 (5)
A/broiler duck/Kr/Buan2/2014 (H5N8)
Inoculated 2/5 28 0/5 4/5 (7.5 ± 0.6)
1/3 (6)
A/Baikal teal/Kr/Donglim3/2014 (H5N8)
Inoculated 3/5 34 1/5 (20) 3/5 (7.3)
Controls (no virus exposure) 0/3 0/3 0/3

*Unless indicated otherwise, data represent the number of affected animals/ animals in the group. Animals were inoculated by the intranasal route with 106.5 egg-infective dose50/0.1 mL of the selected viruses; HI, hemagglutination inhibition.
†Severe depression, cloudy eye, and intermittent head-shaking.
‡Weight loss was measured at 11 d postinoculation and is expressed as a percentage of the weight of preinoculation ducks.
§HI titer was assayed in serum samples taken at 14 d postinoculation. Data show the ratio of antibody-positive animals to the number of virus-inoculated animals.
¶Three uninoculated birds were co-housed with infected birds as a contact group 8 h after inoculation.

Main Article

Page created: January 20, 2015
Page updated: January 20, 2015
Page reviewed: January 20, 2015
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