No, they didn't look chalky at all. Just different shades of brown, some rather gooey looking.
I live in central Tennessee.
Sounds like either sacbrood or chill brood. Both usually end up as brown gooey sacs and are usually found in hives with more brood to care for than worker bee to attend to them.
If sacbrood feeding terrimycin can help. If chillbrood reduce the hive size and feed Honey-B-Healthy or cider vinegar in the syrup.
If feeding an antibiotic doesn't work consider shaking the brood frames free of bees and replace them with frames of stores. This removes the infected brood and frames and induces a break in brood production that should quell the infection of what ever it isand giveing the bees a chance to over come it. Removing the brood frames will also remove most of any varroa infestation which only aids the disease.
Hopefully, when the queen begins to lay eggs agin, she will be doing so on un-infected comb.
The shaking of the bees like this also works for EFB or AFB when antibiotics fail as the excess pathogens are held in the comb. Reducing some amount of pathogens aids the bees in overcoming them. Almost all bees carry pathogens of various sorts, but w hive dies when one or more of those pathgens reaches a tipping point and they overwhelm the bees. 86ing the comb usually removes enough of the pathogens to put things back in balance.
There has been some research along this line in Central Canada focusing on EFB.