I think that I have just experienced my first case of CCD.
2 weeks ago, I put a cell bar frame into the hive. The frame was new so I wanted the bees to "polish" it up and get it all bee friendly and ready to receive grafts. The hive seemed to have more than the normal number of young workers, but it was requeened the 5th of June. The brood pattern was good. There was lots of nectar and pollen. In short, all looked good to me. The mite count was low, few beetles and ants, no sign of disease. Good water source nearby - the weather has been very hot.
Checked today and the bees were gone. There was capped brood, honey pollen, and the dead queen on the bottom board.
If I left out any pertinent info, let me know. I keep detailed records and can provide lots of info on the hive.
Was this CCD?