So mom's auto-immune wound was indeed infected - as well as a simultaneous bladder infection - both of which were stabilized by antibiotics, and after four days or so in ICU they moved her to a regular room awaiting surgery. She'd had three unsuccessful surgeries at the prior care facility, and we were told they would not do a forth; a decision revisited by the hospital staff, so will wait and see.
That said, mom was alert, comfortable and in good spirits the three days I spent with her in ICU.
Thanks for all your well-wishes!