Colonization with methicillin-resistant Staphylococcus aureus after liver transplantation

Area of Science:

• Infectious Diseases
• Transplantation Medicine
• Medical Microbiology

Background:

• Methicillin-resistant Staphylococcus aureus (MRSA) is a significant cause of infection post-orthotopic liver transplantation (OLT).
• While MRSA colonization is a known risk factor for infection, its incidence and predictors after OLT remain unclear.

Purpose of the Study:

• To determine the incidence of MRSA colonization after OLT.
• To identify factors associated with MRSA acquisition in OLT recipients.

Main Methods:

• Prospective cohort study of 60 OLT patients (2000-2002).
• Nasal swab surveillance cultures at baseline and at weeks 2, 6, 13, and 26 post-transplant.
• Exclusion of patients with baseline MRSA colonization.

Main Results:

• 15% (9/60) of patients acquired MRSA colonization during the median 72-day follow-up.
• Factors associated with increased colonization risk included urinary catheter use (>5 days), postoperative bleeding, and preoperative fluoroquinolone use.
• No patients without these risk factors developed MRSA colonization.

Conclusions:

• Nasal MRSA carriage is commonly acquired following OLT.
• Postoperative screening for MRSA carriage is crucial for reducing nosocomial transmission in OLT patients.
• Further research is needed to develop predictive models for targeted screening of high-risk OLT recipients.