Medical data and biological samples obtained from transplant patients are collected and managed across Germany with the help of the DZIF Transplant Cohort. The data and samples form the basis of scientific studies which investigate the connections between numerous factors influencing an organ's susceptibility to infection and organ function.

Infections in transplant recipients have a decisive impact on graft function and survival of the transplant recipient, but many issues are still poorly understood. For example, little is known about the long-term consequences of many infections on graft survival/function and graft- versus-host disease (GvHD), the role of individual susceptibility to bacterial, viral and fungal colonisation under immune suppression, the evolution of the antiviral T cell repertoire, the long- term impact of antiviral therapy on graft and patient survival or changes in the physiological microbiome that may have a bearing on colonisation with pathogenic microbes. Taking advantage of the fact that most of the university hospitals with sizeable transplantation programs in Germany are also DZIF partners, we will establish a large multicentre prospective observational cohort of transplant recipients.

Inclusion Criteria:

• Consent
• undergone transplantation of kidney, pancreas, liver, heart or stem cells

Exclusion Criteria:

• No consent

Patients of any age who have received a kidney, pancreas, liver, heart or stem cell transplant at one of the listed partner centres

The use of collected data and biosamples is possible on the basis of an application to the Scientific Steering Committee of the transplant cohort. Cooperations with members of the cohort are welcome

The use of resources is possible after successful review of the preliminary and main application to the transplant cohort by the internal Scientific Steering Committee and - depending on the study design - external reviewers