Short beak and dwarfism syndrome among Pekin ducks: First detection, full genome sequencing, and immunohistochemical signals of novel goose parvovirus in tongue tissue.

Novel goose parvovirus (NGPV) is continuously threatening the global duck industry, as it causes short beak and dwarfism syndrome among different duck breeds. In this study, we investigated the viral pathogenesis in the tongue of affected ducks, as a new approach for deeper understanding of the syndrome. Seventy-three, 14- to 60-day-old commercial Pekin ducks were clinically examined.

Protective effectiveness of two vaccination schemes against the prevalent Egyptian strain of Newcastle disease virus genotype VII.

Background: Despite the strict preventive immunization used in Egypt, Newcastle disease remained a prospective risk to the commercial and backyard chicken industries. The severe economic losses caused by the Newcastle disease virus (NDV) highlight the importance of the trials for the improvement and development of vaccines and vaccination programs.

Aim: In the present study, we evaluated the effectiveness of two vaccination schemes for protection against the velogenic NDV (vNDV) challenge.

Molecular characterization of aviadenovirus serotypes and pathogenicity of the identified adenovirus in broiler chickens.

Inclusion body hepatitis (IBH) is an economically significant viral disease that primarily affects broiler chickens. At least 12 different aviadenovirus serotypes are responsible for causing IBH. This study aimed to use polymerase chain reaction (PCR) and phylogenetic analysis to characterize fowl adenovirus isolates that were in circulation from 2019 to 2021 and investigate the pathogenicity of the isolated strains in commercial broiler chickens.

The natural antiviral and immune stimulant effects of essential oil onion extract against virulent Newcastle disease virus.

Fifty broiler chicks were divided into five groups to study the antiviral and immune-stimulant effect of essential oils (ACEO). The effect of essential oils administration single or combined with NVD vaccine in broilers, more than one parameter was studied in this study i.e.

Molecular characterization of fowl aviadenoviruses species D and E associated with inclusion body hepatitis in chickens and falcons indicates possible cross-species transmission.

During the period from 2015 to 2017, frequent outbreaks of inclusion body hepatitis (IBH) were observed in broiler chickens and falcons in Saudi Arabia. Fifty samples were collected from both species. The histopathological examination and polymerase chain reaction confirmed the IBH infection in eight samples (five samples from chickens and three samples from falcons).

Complete genome sequence of a virulent Newcastle disease virus isolated from an outbreak in chickens in Egypt.

The complete genome sequence of a virulent Newcastle disease virus (NDV) isolated from chickens in Egypt was determined and compared to the sequence of NDV strains isolated from different parts of the world. The genome is 15,186 nucleotides (nt) long and consists of 6 genes in the order of 3'-N-P-M-F-HN-L-5'. The genome contains a 55-nt leader region at the 3' end and a 114-nt trailer region at the 5' end.