Health
Avian influenza vaccination of poultry that outbreak is thought to increase
Vaccination of poultry against bird flu has moved up the agenda after the latest data confirm the worst year on record in the UK and Europe.
Between 11 June and 9 September 2022, there have been 56 outbreaks in UK poultry, 22 in domestic birds and 710 in wild birds.
See also: Strict bird flu regulations imposed on East Anglia
This comes against the backdrop of 788 highly pathogenic avian influenza (HPAI) virus detections reported in 16 countries in the EU and the European Economic Area during that period, according to data from the European Food Safety Authority (Efsa). .
“The unusual persistence of wild birds continued through the summer and occurred in 15 European countries,” the magazine said. new report.
Over the past few years, no or only a few cases have been detected during the summer months.
epidemic
Efsa said the entire 2021-2022 HPAI season had 2,467 outbreaks in poultry and culled 47.5 million birds, causing the largest epidemic ever observed in Europe.
Heavily infected wild birds remain at risk for poultry infection, with 3,573 HPAI events recorded in wild birds over the past 12 months.
Guilhem de Seze, Efsa’s head of risk assessment, warned that the current epidemic is clearly still ongoing, with cases in poultry and wild birds continuing until September.
“As autumn migration begins and the number of wild birds wintering in Europe increases, the persistence of the virus observed in Europe may make the risk of HPAI infection higher than before,” he said. rice field.
Meanwhile, in its latest briefing, the Animal and Plant Health Authority (Apha) said the H5N1 bird flu strain was confirmed on 3 October at a facility near Kid’s Grove in Newcastle-under-Lyme, Staffordshire.
This comes after the virus was confirmed on October 1 at a second facility near Bury St Edmunds, Suffolk, and at two more facilities near Attleborough, Norfolk.
vaccination
Some countries, including China, have vaccinated against the virus for several years, but it is banned in the UK and Europe.
However, it is understood that the EU is considering revoking the ban after escalation of the case.
Ian Brown, Apha’s head of virology, said many vaccine candidates were being actively tested, and now there’s a change of mind.
They were necessary because vaccines licensed for use in Europe are poorly compatible with current H5 virus strains.
“The studies we are doing show that the vaccine is so mismatched that it is unlikely that the immunity it provides will protect birds from infection from this new H5N strain. I will,” he told BBC Radio 4. agriculture today program.
But given the severity of bird flu this year, he suggested the UK should be ready to use a vaccine.
Birds can be vaccinated by injection into the eggs or by spraying the chicks.
As with vaccinating cattle for bovine tuberculosis, one of the problems is that the spread of the disease cannot be monitored because vaccinated and infected birds cannot be distinguished.
But next-generation vaccines offer that potential.
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Sources 2/ https://www.fwi.co.uk/livestock/poultry/poultry-bird-flu-vaccination-considered-as-outbreaks-increase The mention sources can contact us to remove/changing this article |
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