My mother lived on a farm (i,.e. there was enough to eat) and she said it was normal to scrape the worms off the bacon in summer. It hung in the smoke chamber all the time, that was the way to prevent it from spoiling. In summer, a few flies and their eggs might have survived that place.We once found out that my own Grandfather was eating green bacon, and frequently. These things toughen you up (as in, don't kill you makes you stronger).
As said, that was after the war!