2023-05-25 18:28:38
Vaccines tested on “very effective” ducks
According to ANSE, the convincing results of the trials make it possible to “launch a vaccination campaign from the fall of 2023” in France.
In France, an experiment was launched last year, around two candidate vaccines for waterfowl, developed by the Boehringer Ingelheim and Ceva Santé Animale laboratories (photo illustration).
AFP/RODRIGO GAVINI
The “favorable results provide sufficient guarantees to launch a vaccination campaign from the fall of 2023”, for its part wrote the Ministry of Agriculture on its website.
The repetition and scale of the crises linked to avian flu (more than 20 million poultry slaughtered in 2021-2022 in France, already more than six million in 2022-23) have convinced European countries to imagine a vaccine strategy.
euthanized
In France, an experiment was launched last year around two candidate vaccines for waterfowl, developed by the Boehringer Ingelheim and Ceva Santé Animale laboratories.
European neighbors are testing vaccines in other poultry species.
The French experiment involved a few hundred ducks, vaccinated or not, and euthanized at the end of the process.
The virus currently circulating in France and around the world was inoculated into some of the ducks, previously vaccinated, to measure how much virus they excreted, and if they might still contaminate their congeners.
“Stopped direct transmission”
The two vaccines, with “very similar” results, also “almost stopped direct transmission” and “abolished” indirect transmission, by air.
“It’s very effective,” summarized Me Grasland, noting a “very good level of protection” for vaccinated ducks “even in direct contact, in the same park, with the droppings” of infected ducks.
After a lull of a month and a half, the virus has been spreading once more since the beginning of May in dozens of farms in the South-West, in particular in the Gers.
France plans to vaccinate ducks as a priority (of the Mulard type but also Peking and Barbary – the latter being rather raised for their meat) because of their “particular role” in the dynamics of the epizootic.
Ducks are very susceptible to the virus and excrete it into the environment even before showing symptoms, which contributes to the low noise spread of avian flu.
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