You can tell I'm bored when I start thinking these kind of things, but.... Step forward the forum bacteriologists and gastro specialists ! I've been swallowing a lot of flies lately after they zoom in and hit the back of my throat as I'm huffing and puffing my way home. I've also had a rather dodgy stomach of late. If said flies had been feasting on any - ahem - "dogs' eggs" just before they flew in and I swallowed them (the flies, not the canine number 2s), is there enough bacteria there to cause a stomach upset ?