The study aims to determine if voriconazole prevents invasive fungal infections in liver transplant recipients. Endpoints would be: occurrence of invasive fungal infection and fungal colonization. Two groups will be compared: patients who received voriconazole as prophylaxis and historical controls who did not receive this prophylaxis.

The following variables will be followed: time and location of positive cultures, underlying diseases and severity of illness, voriconazole usage prophylactically, physical exam findings, laboratory and radiographical data, antimicrobial usage, microbiological data and resistance patterns, choice of antifungal drugs once organism identified, suspected source of infection, microbiological outcomes, laboratory results, demographic information, medications, clinical outcome, gender, weight, ethnicity, and past medical history.

Inclusion Criteria:

• Patients receiving a liver transplant at University of Pittsburgh Medical Center (UPMC) between January 1, 2001 and June 30, 2005.

liver transplant patients receiving voriconazole