[Development and evaluation of an inactivated bivalent vaccine against duck viral hepatitis]. 2015

Fenggui Yin, and Li Jing, and Shuang Zhang, and Meng Yu, and Wanlin Zhang, and Guobing Fan, and Xiukai Dong, and Wenjun Liu

The rapid mutation and widely spread of duck hepatitis A virus (DHAV) lead to the vast economic loss of the duck industry. To prepare and evaluate bivalent inactivated vaccine laboratory products of DHAV, 6 strains were screened from 201 DHAV-1 strains and 38 DHAV-3 strains by using serotype epidemiological analysis in most of the duck factory. Vaccine candidate strains were selected by ELD50 and LD50 tests in the 6 strains. Continuously passaged, the 5th passaged duck embryos bodies grinding fluid was selected as vaccine virus seeds. The virus seeds were treated with formaldehyde and water in oil in water (W/O/W) emulsions, making into three batches of two bivalent inactivated vaccine laboratory products. The safety test, antibody neutralization test, challenged protection and cross immune protection experiment suggested that the vaccines possessed good safety, and neutralizing antibodies were detected at 7th day and the challenged protection rate reached 90% to 100% at the 14th and 21st day. Moreover, immune duration of ducklings lasted more than five weeks. However, cross-immunity protection experiments with DHAV-SH and DHAV-FS only had 20%-30%. The two bivalent inactivated vaccine laboratory products of duck viral hepatitis were effective and reliable, providing a new method as well as a new product for DHAV prevention and control.

UI MeSH Term Description Entries
D009500 Neutralization Tests The measurement of infection-blocking titer of ANTISERA by testing a series of dilutions for a given virus-antiserum interaction end-point, which is generally the dilution at which tissue cultures inoculated with the serum-virus mixtures demonstrate cytopathology (CPE) or the dilution at which 50% of test animals injected with serum-virus mixtures show infectivity (ID50) or die (LD50). Neutralization Test,Test, Neutralization,Tests, Neutralization
D010850 Picornaviridae Infections Virus diseases caused by the PICORNAVIRIDAE. Picornavirus Infections,Infections, Picornaviridae,Infections, Picornavirus,Infection, Picornaviridae,Infection, Picornavirus,Picornaviridae Infection,Picornavirus Infection
D011201 Poultry Diseases Diseases of birds which are raised as a source of meat or eggs for human consumption and are usually found in barnyards, hatcheries, etc. The concept is differentiated from BIRD DISEASES which is for diseases of birds not considered poultry and usually found in zoos, parks, and the wild. Disease, Poultry,Diseases, Poultry,Poultry Disease
D004371 Hepatitis Virus, Duck Unassigned species, in the family PICORNAVIRIDAE, causing high mortality in ducklings 3 days to 3 weeks old. Duck Hepatitis Virus,Avihepatovirus A,Duck Hepatitis A Virus,Duck Hepatitis A Virus 1,Duck Hepatitis A Virus 2,Duck Hepatitis A Virus 3,Duck Hepatitis Virus 1,Duck Hepatitis Virus 3,Duck Hepatitis Viruses
D004372 Ducks A water bird in the order Anseriformes (subfamily Anatinae (true ducks)) with a broad blunt bill, short legs, webbed feet, and a waddling gait. Duck
D006524 Hepatitis, Viral, Animal INFLAMMATION of the LIVER in animals due to viral infection. Viral Hepatitis, Animal,Animal Viral Hepatitides,Animal Viral Hepatitis,Viral Hepatitides, Animal
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D014761 Viral Hepatitis Vaccines Any vaccine raised against any virus or viral derivative that causes hepatitis. Hepatitis, Viral, Vaccines,Hepatitis Vaccines, Viral,Vaccines, Viral Hepatitis
D015164 Vaccines, Inactivated Vaccines in which the infectious microbial nucleic acid components have been destroyed by chemical or physical treatment (e.g., formalin, beta-propiolactone, gamma radiation) without affecting the antigenicity or immunogenicity of the viral coat or bacterial outer membrane proteins. Inactivated Vaccine,Killed Vaccine,Killed Vaccines,Vaccines, Killed,Inactivated Vaccines,Vaccine, Inactivated,Vaccine, Killed
D057134 Antibodies, Neutralizing Antibodies that reduce or abolish some biological activity of a soluble antigen or infectious agent, usually a virus. Neutralizing Antibodies,Antibody, Neutralizing,Neutralizing Antibody

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