Sorry I joined this discussion late...Mamalama sent me an email but I was out of town at the time.
While CMV can cause CMV hepatitis and jaundice, they need to biopsy her to make sure it isn't something autoimmune like AIH or PBC - completely different treatment to treating CMV. But to back track...have they run any blood work for the autoimmune conditions? ANA, AMA (for PBC), SMA, LKM1 antibody, and check her IgG levels?
If Tylenol was causing an acute response but she's off and her numbers have risen, then it could have triggered an autoimmune condition.
That's a start. Let us know what's new!
Sorry for the delay...I'm really not on here much since AIH is slow over here
Feel free to email me separately as well....I'm much quicker on email. The link to my email should be under my screen name.