Blood infections themselves can be very tough on a person, and organs such as the kidneys.
When my leg blew up with an
they never named the specif bug, used a generic term, cellulitus, My kidneys almost totally shut down, even though the redness and swelling was confined to the leg.
I would worry more about the infection, and hope the Dr's are agressively treating that. But I would also be sure to tell the Dr that her urine output has noticably declined since starting the anti-biotic. He may have options of other anti-biotics equally effective or a combination of medications to kill off the infection.
My Dr's used a combination of IV anti-biotics before my leg began to get better. That was somewhere near the end of the first week. My total stay was 12 days. I was pretty sick.
Here's hoping she gets better soon.
Call her Dr and tell him what's going on. He isn't psychic, if you don't tell him he cannot know, and it could easily make a difference in his treatment plan.
Take Care,
Charlie B