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A double recombinant herpes virus of turkeys for the protection of chickens against Newcastle, infectious laryngotracheitis and Marek's diseases. 2019

Linda Gergen, and Stephanie Cook, and Brooke Ledesma, and Wade Cress, and Deb Higuchi, and Diane Counts, and Julio Cruz-Coy, and Colin Crouch, and Phillip Davis, and Ian Tarpey, and M Morsey
a Intervet Inc. USA , Elkhorn , NE , USA.

A double recombinant strain of herpes virus of turkeys (HVT) was constructed that contains the fusion (F) gene from Newcastle disease virus (NDV) and the gD plus gI genes from infectious laryngotracheitis virus (ILTV) inserted into a non-essential region of the HVT genome. Expression of the F protein was controlled by a human cytomegalovirus promoter, whereas expression of gD plus gI was driven by an ILTV promoter. The double recombinant vaccine virus (HVT-NDV-ILT) was fully stable genetically and phenotypically following extended passage in cell culture and infection of chickens. Safety of the vaccine virus was confirmed by overdose and backpassage studies in specific-pathogen-free chickens. Chickens vaccinated with a single dose of HVT-NDV-ILT administered by the in ovo route were highly protected from challenge with the velogenic NDV (GB Texas), ILTV (LT 96-3) and Marek's disease virus (GA 5) strains (97%, 94% and 97%, respectively). Similarly, chickens vaccinated with a single dose by subcutaneous (SC) route at 1 day of age were highly protected from challenge with the same three viruses (100%, 100%, and 88%, respectively). The protection level of a single dose given by in ovo or SC route against challenge with a virulent Marek's disease virus strain demonstrates that insertion of multiple genes from two different pathogens within the HVT genome had no adverse effect on the capacity of HVT to protect against Marek's disease. These results demonstrate that HVT-NDV-ILT is a safe and efficacious vaccine for simultaneous control of NDV, ILTV and Marek's diseases.

UI MeSH Term Description Entries
D008380 Marek Disease A transmissible viral disease of birds caused by avian herpesvirus 2 (HERPESVIRUS 2, GALLID) and other MARDIVIRUS. There is lymphoid cell infiltration or lymphomatous tumor formation in the peripheral nerves and gonads, but may also involve visceral organs, skin, muscle, and the eye. Fowl Paralysis,Marek's Disease,Fowl Paralyses,Mareks Disease,Paralyses, Fowl,Paralysis, Fowl
D008381 Herpesvirus 2, Gallid The type species of the genus MARDIVIRUS in the family HERPESVIRIDAE. It is the etiologic agent of MAREK DISEASE, infecting domestic fowl and wild birds. Fowl Paralysis Virus,Marek's Disease Herpesvirus 1,Marek's Disease Virus Serotype 1,Neurolymphomatosis Virus,Gallid Herpesvirus 2,Herpesvirus 2 (gamma), Gallid,Marek Disease Herpesvirus 1,Fowl Paralysis Viruses,Neurolymphomatosis Viruses,Paralysis Virus, Fowl,Paralysis Viruses, Fowl
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
D002645 Chickens Common name for the species Gallus gallus, the domestic fowl, in the family Phasianidae, order GALLIFORMES. It is descended from the red jungle fowl of SOUTHEAST ASIA. Gallus gallus,Gallus domesticus,Gallus gallus domesticus,Chicken
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
D001352 Herpesvirus 1, Gallid The type species of the genus ILTOVIRUS found on every continent and affecting mainly chickens and occasionally pheasants. Avian Infectious Laryngotracheitis Virus,Gallid Herpesvirus 1,Herpesvirus 1 (alpha), Gallid,Infectious Laryngotracheitis Virus, Avian
D013047 Specific Pathogen-Free Organisms Animals or humans raised in the absence of a particular disease-causing virus or other microorganism. Less frequently plants are cultivated pathogen-free. Pathogen-Free Organisms,Specific Pathogen Free,Organism, Pathogen-Free,Organism, Specific Pathogen-Free,Organisms, Pathogen-Free,Organisms, Specific Pathogen-Free,Pathogen Free Organisms,Pathogen Free, Specific,Pathogen Frees, Specific,Pathogen-Free Organism,Pathogen-Free Organism, Specific,Pathogen-Free Organisms, Specific,Specific Pathogen Free Organisms,Specific Pathogen-Free Organism
D014422 Turkeys Large woodland game BIRDS in the subfamily Meleagridinae, family Phasianidae, order GALLIFORMES. Formerly they were considered a distinct family, Melegrididae. Meleagridinae,Meleagrididae
D026002 Herpesvirus 1, Meleagrid A species in the genus MAREK'S DISEASE-LIKE VIRUSES, in the family HERPESVIRIDAE, infecting turkeys. Marek's Disease Virus Serotype 3,Meleagrid Herpesvirus 1,Turkey Herpesvirus,Herpesvirus, Turkey,Herpesviruses, Turkey,Turkey Herpesviruses

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