Backyard hobby beek; only harvest a few frames at a time; scrape, crush, and strain from plastic foundation. Last week, I was harvesting a frame and found a spot about the size of 2 quarters that seemed to be chaulkbrood. I just scraped it out with a spoon and threw it away. There was a little bit of discoloration left on the plastic as I leave a bit of foundation for the bees to rework. I returned the frames to the hive. This was a new hive started in dappled light in the wet spring last year before I recieved the Gospel of Iddee that the bees and my life would be more pleasant in full sun. I did not harvest from it last year, leaving it all for the bees to winter on. I am thinking that the fugus is from last year. It seemed like a small enough spot. The honey around it is great. The hive seems healthy and active. My default position is that the bees are a million years smarter than I am and can usually take care of themselves. When come the second thoughts... Q: Should I have thrown the frame away, or will the bees and heat be able to erradicate any remaining fugus? Should I go back in and replace that frame now? Or, am I just over-thinking this?