Two extremely pathogenic avian influenza (HPAI) vaccines presently being examined in a area research successfully shield laying hens from the illness eight weeks after vaccination, in accordance with analysis by Wageningen College & Analysis (WUR).
Within the area research, 1,800 laying hens had been vaccinated and housed on two industrial poultry farms. Eight weeks after vaccination, a number of the vaccinated layer hens had been taken to WUR the place they had been contaminated with HPAI to check the effectiveness of the 2 vaccines. After testing, the vaccines had been confirmed to be efficient in opposition to HPAI, WUR reported.
The trial at these two farms started within the fourth quarter of 2023 and can conclude within the third quarter of 2025. 4 extra teams of the birds will probably be contaminated with HPAI all through the research to additional consider the effectiveness of the vaccines.
“We study virus transmission after vaccination, in addition to survival fee, virus excretion and immune response. Based mostly on these performances, we assess the effectiveness of the vaccines,” acknowledged WUR Veterinary Microbiologist Evelien Germeraad.
“The incontrovertible fact that the vaccines work in apply is a vital step in the direction of the large-scale vaccination of poultry in opposition to the hen flu virus,” the Dutch agriculture ministry mentioned in a press release.
“The authorities intends to make large-scale vaccination potential responsibly, taking under consideration animal and public well being, in addition to animal welfare. Additionally to decrease any unfavorable results of the vaccination on commerce.”
The analysis is being performed by WUR, animal well being group Royal GD and Utrecht College’s College of Veterinary Medication.
Extra HPAI vaccination analysis from WUR
In March 2023, analysis from WUR discovered that two Herpes Virus of Turkey (HVT)-H5 vaccines had been efficient in opposition to HPAI in layer hens underneath laboratory situations.
Each vaccines confirmed to be 100% efficient in stopping illness, mortality after an infection and the unfold of the virus between birds with HPAI.
