Found this in two of my hives. Some of the larvae appear to be mis-colored and mis-shapen. Some appear grey-ish or yellowish, instead of the healthy pearly white they should be. Some are sunken on the cell walls, or just look deflated.
Reading Hive and the Honeybee, it sounds like it's AFB or EFB. I did the ropy test with a toothpick, and it wasn't stringy at all. Just liquidy after I mashed up some "infected" brood. Not sure which one it is, or if it is either.