I have never seen it fermented from shb without larvae present. Also you would see comb teeming with adult beetles. And you will know the difference
! At least that has been my unfortunate experience.
And as stated above slimy --- as in a coat of slime on the comb, often oozes out the bottom boards when it happens on a hive.
You said the frames where capped, could they have fermented from moisture gathering before extraction???