Can't diagnose from the pic. They do sell test kits just go and get one. Did you try the match take a match stir the dead larva does it rope out when you pull out the match.
Not AFB. Could be EFB. Could be early chalk. Not AFB
I would guess possible EFB from the photos.
Are the larva turning yellow in the cell. I can't tell from the photo.
Here are better photos and couple videos -https://drive.google.com/drive/folders/1JbJ5kY3DA2mBtMtK7wbU-eVHzZMSMlui?usp=sharing
Yes, some larva turns yellow, some brown-ish, some "dries-out"..
I'd feed them and then check back in about 1 week.
Horseshoe Point Honey -- http://localvahoney.com/
What do you see that makes you suspect AFB?
The more I learn about bees, the less I know.
Doesn't AFB show underneath a blacklight?
Like the others.EFB maybe but not AFB!!! Give them a little dusting of Terramycin and sugar and you will be good.
Probably not...no sunken perforated cappings. Does it have an awful odor?
BPMS, Bee Parasitic Mite Syndrome.
42 + years - 24 colonies - IPM disciple - Naturally Skeptic
"People will generally accept facts as truth only if the facts agree with what they already believe."- Andy Rooney
Agree not AFB. Is this an overwintered hive you are looking at? As stated above it could be EFB, or PMS or some other brood disease. Looking for PMS, is there quanine deposits in the cells? They look like white crystals. If you google Megan Milbrath she has photos of PMS and a good “how to” on diagnosing a dead hive.
Western Catskill Mountains
Looks like EFB to me.
EFB Most brood killed pre capping; only a small percentage die after capping and show signs of bees opening cells. AFB most die after capping and show the sunken cappings and cells being torn open. EFB shows yellowed brood food darkened larva and twisted and awkward in the cell. Eggs and mixed age larvae interlayed with older larvae as they die and are removed.
lots of varied symptoms due to a variety of secondary bacterial infections that may be present. Easy to pick out when it becomes well advanced and you know what to look for. Easy to overlook and blame the scattered brood pattern on mites or a partially inbred queen, mites, etc.
It is not easy to get pictures with enough light into the cell bottoms, good focus and sufficient magnification. If the pictures are right they show more than you can see directly with you own eyes.
Thanks everyone for the input!! After reading on AFB, EFB and PMS, it looks like I have PMS after all - "Larvae may appear sunken to the side of the cell and may show symptoms of white with some debris at the posterior end" (https://beeinformed.org/2013/10/15/p...-syndrome-pms/)
I'll put some Formic Acid into a zip-lock with napkins for a week and see how it'll go.