title after testing positive for a banned substance, officials said.
The French-trained horse, ridden by Christophe Gallier, had won Sweden’s top trotting event on May 28.
The runner-up in the race, Italian-trained horse Let’s Go, was also disqualified for doping.
“Both the number one and number two have tested positive for doping,” the head of sporting events at the Solvalla race track where the race was held, Mattias Stenby, told AFP.
Jag de Bellouet tested positive for “an anti-inflammatory substance that is normally used on humans”, Stenby said.
Swedish news agency TT reported that the substance was diclofenac.
The Italian horse showed traces of etacrynic acid, which is often used to try to mask the use of banned substances, TT said.
The victory will instead go to Conny Nobell, ridden by Björn Goop of Sweden, while second place goes to Thai Tanic, ridden by Björn Goop’s father, Olle Goop.