OK, I was not expecting that.
I don't know why I wasn't expecting that. Minna killed off her entire original cast, after all, between page 55 and page 56 (though not onstage, and we're allowed to imagine them dying peacefully from old age if we want; though I don't suppose all of them did.)
But nevertheless, while I was sure from the page of the troll bite that she was infected, I expected something else to happen -- possibly, as lots of others have suggested, a combination of the serum and the preacher. And I thought the multipage update was going to be her starting to trollify, before they managed to get it stopped. This is better storytelling; but it's hard.
And I am now really worried about that one line of footprints with the wheelbarrow in Reynir's vision.
But brave Tuuri!