I never had an infection during my fast, but did have plenty of skin eruptions, passed a small kidney calcification, and had a major detox crisis on day 57 when a pouch of antique garbage that had been velcroed to my colon exploded in a rather dramatic fashion, causing DAY GLO ORANGE diarrhea and flu symptoms! My face is still not settled down from that one -- I have lots of stuff still stirred up from the fast that is still coming out in various ways... including a nasty yeast infection which turned into a nasty bladder infection just a couple weeks ago.
My naturopath gave me homeopathic and herbal support for the kidney crisis, but otherwise I pretty much fasted through and drink LOTS of extra water, and did enemas along with the tea/swf routine.
The whole idea is to help the body take out the trash ASAP! It surely can cause heck if it hangs around!