So after reading the NIH study it looks like the compost toilets they tested were the desiccation kind. I don't really think those should be called compost toilets at all. There's some link somewhere that I can't remember off the top of my head ( maybe it's in the humaure handbook) where Jenkins talks about having his compost sent to a local lab to be tested for harmful bacteria for like a decade or something and it always came back fine.