24 hours later, we returned to the hives and pulled out the test frames to count the results. The photo to the left shows one of our 100% queens, which means that her workers removed 100% of the dead brood in 24 hours. Queens whose workers do not remove 100% are checked again in 48 hours. We had one hive that not only removed 100% of the dead brood on the sample side of the frame, but also removed 90% of the dead brood from the other side that had accidentally been killed by adding too much liquid nitrogen to the tube! She's a rock star!