Sranc flesh would be a beautiful transmission vector for a Console designed bio-weapon targeted enough to kill the Great Ordeal but not broad enough to risk wiping out human civilization entirely (which they can't do because they need 44,000 alive or whatever).
If Kellhus has switched goals and now walks the road he outlined for his father (the "string of calculated defeats), he might even do such a thing knowingly...
But this is just idle speculation. I don't really believe it myself.