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intgames Sardinia’s sheep farmers battle bluetongue as climate warms
A flock of sheep grazes in a field in Arbus in the island of Sardinia on October 2, 2024. – The sheep huddle together, bleeding from the nose, aborting lambs, or suffocating on saliva as they succumb to bluetongue, a virus sweeping through flocks on the Italian island of Sardinia. Agence France-Presse
ARBUS, Italy — The sheep huddle together, bleeding from the nose, aborting lambs or suffocating on saliva as they succumb to bluetongue, a virus sweeping through flocks on the Italian island of Sardinia.
Some 20,000 sheep have died so far this year on the island, which is home to nearly half Italy’s flock and plays an important role in the production of famed Italian cheeses such as Pecorino.
Article continues after this advertisementIt is another blow for farmers in a region already battered by a drought aggravated by man-made climate change — which experts say is also fueling the spread of bluetongue and longer outbreaks.
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“The virus hit about two and a half months earlier than usual,” 39-year-old farmer Michela Dessi told AFP as she scanned her flock for panting or limping sheep in her fields in Arbus in western Sardinia.
Article continues after this advertisementBluetongue does not present any risks to humans but in animals it causes swollen heads, high fevers, mouth ulcers, difficulty swallowing and breathing, and can turn an infected animal’s tongue blue.
Article continues after this advertisementIt is transmitted between animals by biting midges.
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While cattle, goats and deer can get it too, sheep are the most severely affected, according to the World Organization for Animal Health (WOAH).
Article continues after this advertisementInfected and pregnant ewes abort or their lambs are born deformed, and survivors can lose their wool.
Sunken sides are a sign the ewes are carrying dead fetuses. The sick animals struggle to expel them.
Virus peaksThe infection rate this year on Dessi’s farm is about 60 percent, and some 30 percent of her sheep have aborted.
Around 50 of her 650 sheep have died — and in a way she said was “horrible to watch”.
With high fevers, “they refuse food and water and some suffocate or drown in their own saliva”, she said, adding that it is illegal to euthanize them.
Nearly 3,000 outbreaks have been recorded so far this year in Sardinia, compared to 371 last year — and the end is not yet in sight.
Bluetongue used to peak in Sardinia in August but has done so as late as November in recent years, according to the region’s veterinary research institute (IZS).
“Climatic conditions heavily influence midge populations,” the animal health division at the United Nations’ Food and Agriculture Organization in Rome told AFP.
They affect “their biting behavior and the speed of development of the virus, with climate change likely driving the virus’s expansion… and contributing to larger outbreaks”.
Cases have been reported this year in other European countries, from neighboring France to Portugal, Spain, Germany, Belgium and the Netherlands.
Bluetongue has been present in Sardinia since 2000 but Italy’s farming lobby Coldiretti says authorities are too slow each year to vaccinate the island’s flocks.
The costs of failing to rein it in are high.
A University of Bologna study last year found the 2017 outbreak, which killed 34,500 sheep, cost an estimated 30 million euros ($33 million).
That included damages suffered by farms — deaths, reduced milk yields, infertility, abortions — costs to animal health authorities and subventions paid by the region to affected farms.
Mass graves“The first outbreaks occur in the same at-risk areas each year,” meaning highly targeted measures could theoretically prevent outbreaks, said Stefano Cappai from research institute IZS.
There are three variants on the island this year, two of which can be vaccinated against, with mortality rates twice as high among unvaccinated sheep.
Flocks should be vaccinated in March or April, Cappai said, but vaccines were only issued by the region in mid-June this year.
By that point, the virus had begun to spread unchecked.
Even if the vaccines had been made available earlier, some farmers fear to use them.
Others only vaccinate part of their flock, which means they fail to reach herd immunity, Cappai said.
And some farmers — like Dessi — vaccinated her flock, only for the sheep to catch the variant for which there is no vaccine yet.
Battista Cualbu, head of Coldiretti in Sardinia, who also has an outbreak on his farm, said vaccines are not enough and authorities must disinfect areas and provide midge repellents.
“It would certainly save public money because the region has to pay compensation for dead livestock (and) lost income,” he said, including less milk sold and fewer lambs for the slaughterhouse.
Compensation is set at 150 euros per sheep killed by bluetongue — a figure Coldiretti is battling to increase, although the region has failed to pay up over the past three years, Dessi said.
As temperatures fall, the case numbers are expected to decline but Dessi said the end was weeks away.
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“I’ve dug three mass graves already and I fear the worst is still to come”intgames, she said.
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