Hepatic iron content and the risk of Staphylococcus aureus bacteremia in liver transplant recipients

Area of Science:

• Hepatology
• Infectious Diseases
• Transplantation Immunology

Background:

• Iron is essential for Staphylococcus aureus (S. aureus) growth and virulence.
• Liver transplant recipients are susceptible to bacterial infections, including S. aureus bacteremia.
• The role of hepatic iron overload in S. aureus bacteremia post-transplantation requires further investigation.

Purpose of the Study:

• To evaluate the association between hepatic explant iron overload and the risk of S. aureus bacteremia in liver transplant recipients.
• To identify potential risk factors for S. aureus bacteremia in this patient population.

Main Methods:

• Retrospective analysis of liver transplant recipients with S. aureus bacteremia.
• Assessment of hepatic explant iron concentrations using a grading system.
• Correlation analysis between hepatic iron levels, clinical factors, and S. aureus bacteremia.

Main Results:

• A high proportion (53.8%) of patients with S. aureus bacteremia had elevated hepatic iron concentrations (grade ≥ 2).
• While not a direct risk factor, high hepatic iron content was more prevalent in non-carriers who developed S. aureus bacteremia.
• All non-carriers who developed S. aureus bacteremia had high hepatic iron content (grade ≥ 2).

Conclusions:

• Hepatic iron overload may be a significant factor in S. aureus bacteremia development, particularly in liver transplant recipients without S. aureus nasal carriage.
• Quantifying hepatic iron at transplantation could help identify at-risk patients for early detection and prevention strategies.