Key result
An outbreak of duck hepatitis A virus type 1 (DHAV-1) in a duckling farm in Japan resulted in a high mortality rate of 76% among 330 introduced birds.
Case Report (n=330)
No
This report documents the first isolation of duck hepatitis A virus type 1 in Japan since 1963, highlighting a re-emerging veterinary threat.
Alerts to re-emerging DHAV-1 threat in ducklings; leaves open needs for surveillance and control strategies in Japan.
In June 2015, a highly fatal and acute disease broke out in a duckling farm in Hyogo Prefecture, Japan. The birds exhibited poor growth, reduced movement, lying in a dorsal recumbent position, depression, lethargy, ataxia and opisthotonus, with a high mortality rate of approximately 76%. By performing a reverse transcription-polymerase chain reaction (RT-PCR) using primers specific for duck hepatitis A virus type 1 (DHAV-1), we obtained the PCR products of a predicted size. The nucleotide sequences of the PCR products showed a >96% identity with that of the DHAV-1, HB02 strain, which was isolated in China. To our knowledge, this is the first time that the DHAV-1 virus has been isolated since its outbreak in Japan in 1963.
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Kamomae et al. (2017) conducted a case report in Duck hepatitis A virus type 1 (DHAV-1) infection (n=330). Duck hepatitis A virus type 1 (DHAV-1) infection was evaluated on Mortality rate 6 days after introduction. An outbreak of duck hepatitis A virus type 1 (DHAV-1) in a duckling farm in Japan resulted in a high mortality rate of 76% among 330 introduced birds.
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