On July 26, I inspected 2 of my hives and found no brood. I thought maybe they had swarmed, so I placed a frame containing eggs and larvae in each thinking that if they had a queen no queen cells would be made and if they didn't have a queen they could make one. On August 3 I inspected the hives and found no brood in one hive and capped brood along with brood that looked exactly like sacbrood virus. Both hives were Russian packages installed on April 29 and had looked fine up to July 26 (hadn't opened the hives lately because of the nectar flow). What should I do with the remaining bees? Should I get rid of the brood comb? Any insight is greatly appreciated. James