Bees boss Thomas Frank revealed the news shortly after the Bees team was named for Saturday’s lunch-time kick-off at Fulham which is fourth against third.
“That’s a confirmed test for Bryan,” said Frank, speaking to Sky.
“The only reason why we didn’t want to tell anybody was of course everyone knows that he would most likely have stated today if he was negative.
“No symptoms, fit and well, so unfortunately he of course needs to isolate just to keep everything into the right place for a safe environment.
“The good thing is our training ground is the safest place to be, because at the next test everyone was negaitve.
“It’s just unfortunate, but that’s the way it is.”