Tom Anderson typed

What's more of a concern is bacterial spores; i'm hazy on the details, but
i believe there are spore forms of some pathogenic bacteria that will
survive 100 C temperatures; that's why medical autoclaves go to 100 C -
15 mins at 121 C is the traditional gold standard for autoclaves, although
the one in my old lab went up to 140 C (and it looked like R2D2 - bonus!).

Okay, have looked it up - pathogenic spore-forming bacteria (and the
diseases they case) include _Clostridium tetani_ (tetanus), _Bacillus
anthracis_ (anthrax), _Clostridium perfringens_ and _Bacillus cereus_
(food poisoining), and _Clostridium botulinum_ (botulism).

So, if you've got any of those in your hot tank, well, you're buggered
either way, basically.

I doubt it; the clostridia are anaerobes and don't tolerate air very
well. Down in the soil, they are almost universal.

You probably have them in small, manageable numbers in your healthy
intestines anyway. (Please wash hands after using the WC. It is more
important to physically remove muck than to apply antiseptics in normal
situations.)

--
Helen D. Vecht:
Edgware.