Study of Anti-BKPyV Immune Responses in Kidney Transplant Patients With BKPyV Viremia

Inclusion Criteria

• •No objection to participation in the research study (from patients or legal guardians)
• •Affiliated to the French national social security system
• •Age ≥ 7 years old
• •Weight ≥ 12 kg
• •Additional criteria for kidney transplant recipients with BKPyV DNAemia:
• •Patients who underwent kidney transplantation within 12 months prior to inclusion, regardless of the initial indication
• •Detectable de novo BKPyV DNAemia within the first 12 months post-transplantation
• •Additional criteria for kidney transplant recipients without BKPyV DNAemia:
• •Patients who underwent kidney transplantation within 12 months prior to inclusion, regardless of the initial indication
• •No detectable de novo BKPyV DNAemia within the first 12 months post-transplantation
• •Additional criteria for healthy donors (controls):
• •Age ≥ 18 years old
• •Blood donation to the EFS
• •Consent for the use of their blood donation for research purposes.