If you were drawing up a list of factors that could influence this year’s Giro d’Italia, Belgian cattle probably wouldn’t be one of them. But a herd of Walloon cows have, bizarrely, already had an impact on this year’s race, with manure on the roads at the Famenne Ardenne Classic believed to be behind a number of riders falling ill this week.

According to reports in Belgium, riders from several teams have experienced diarrhoea, abdominal pain, fever, and vomiting since taking part in the one-day race on Sunday, where cow dung may have been sprayed onto the riders and their bottles as they raced on wet roads.

Famenne Ardenne Classic, 2026
Famenne Ardenne Classic, 2026 (Image Credit: BestMomentsPictures)

While the source of the widespread illness has yet to be confirmed, staff at Lotto Intermarché have indicated that it is believed to have been caused by campylobacter, a type of bacteria found in animal intestines and responsible for gastrointestinal infections.

Campylobacter is the main cause of bacterial food poisoning in the UK, and most people suffering from the infection can take a week to recover – which isn’t great news if you’re about to start a three-week grand tour like the Giro.

Riders from the Alpecin-Premier Tech, Flanders-Baloise, VolkerWessels, and Van Rysel-Roubaix teams have fallen ill after the rain-soaked race, while three Lotto Intermarché riders were taken to hospital.

Lotto Intermarché, 2026 Giro team presentation
Lotto Intermarché, 2026 Giro team presentation (Image Credit: Fabio Ferrari/LaPresse)

One of those Lotto riders, Liam Slock, has been forced to withdraw from the Giro, with 22-year-old British rider Joshua Giddings called up at the last minute to replace him.

Meanwhile, Arnaud De Lie, who won the Famenne Ardenne Classic, and Milan Mentin both missed the Giro’s team presentation on Wednesday evening, but are expected to start Friday’s opening stage, with Mentin only arriving in Bulgaria last night. That meant only five of Lotto’s eight-man line-up appeared on stage during the team presentation in Burgas.

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“He’s here but not here,” Lotto Intermarché sports director Maxime Bouet told CyclingPro.net when asked about De Lie’s condition.

Bouet confirmed that De Lie, the Belgian team’s leader at the first grand tour of the season and rather ironically nicknamed ‘the bull’, showed no symptoms after winning Sunday’s race, but started feeling nauseous on the flight to Bulgaria.

Arnaud De Lie after wnning the Famenne Ardenne Classic, 2026
Arnaud De Lie after wnning the Famenne Ardenne Classic, 2026 (Image Credit: Elias Rom/Belga Mag/AFP)

“Half the peloton is ill,” the sports director continued. “There was a problem at the Famenne Classic where a lot of riders fell ill, and several riders ended up in hospital. Arnaud is here in Bulgaria, and we hope he’ll start to feel better before Friday. He’s not feeling well, but his participation in the Giro is not compromised at this stage.

“We’ve heard that a few teams were impacted, including going to hospital. In two teams, it’s the same thing – digestive problems, diarrhoea, vomiting. Some riders from our team went to hospital for treatment, and I think it was the same thing for other teams.

“For us, the priority is the health of the riders above all. That’s why we quickly replaced Liam Slock with Joshua Giddings. Milan had symptoms at the Famenne Classic, but he’s much better and he’s going to come to Bulgaria this evening.

“We preferred to leave Arnaud rest in the hotel because he still has a bit of fever. And we didn’t want to infect other teams either, that’s important. Health is the priority for us.”