Respiratory failure associated with human metapneumovirus infection in an infant posthepatic transplant

Area of Science:

• Pediatric critical care medicine
• Transplant infectious diseases
• Virology

Background:

• Liver transplant recipients and pediatric solid organ transplant recipients are at risk for severe infections.
• Human metapneumovirus (hMPV) is a common respiratory pathogen, but its impact on immunocompromised pediatric populations is not well-defined.

Observation:

• A 9-month-old female developed severe respiratory distress 8 days post-liver transplant.
• hMPV infection was confirmed, necessitating mechanical ventilation and extracorporeal membrane oxygenation (ECMO) for 26 days.
• The patient's immunosuppressive therapy was adjusted, and close monitoring for hepatic complications was performed.

Findings:

• This is the first reported case of respiratory failure due to hMPV in a liver transplant recipient or a pediatric solid organ transplant recipient.
• The patient successfully recovered from the hMPV infection with no evidence of allograft rejection or hepatic vessel thrombosis.
• Pulmonary function was satisfactory post-recovery, with a noted possibility of mild developmental delay.

Implications:

• hMPV infection poses a significant threat to immunocompromised pediatric transplant recipients, potentially causing severe respiratory compromise.
• Management requires a multidisciplinary approach, including respiratory support, careful medication management, and vigilant monitoring for complications.
• Further research is needed to understand the epidemiology and long-term outcomes of hMPV in this vulnerable population.