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HEV infection in stem cell transplant recipients—retrospective study of EBMT Infectious Diseases Working Party

Abstract

HEV infection is an emerging cause of acute and chronic hepatitis in stem cell transplant (SCT) recipients. We performed a retrospective observational study among EBMT centers with the aim of describing characteristics, management and outcome of HEV after SCT. There were 34 cases of HEV infection from 12 centers in 6 countries, diagnosed in median 4.5 months after SCT; 20 of acute and 14 of chronic infection. Non-hepatic findings possibly associated with HEV infection were present in 9 (26%). Patients with chronic infection had more characteristics associated with severely immunocompromised status. Ribavirin was provided to 16 patients (47%; 40% with acute and 57% with chronic infection), in median for 75 days. Three (19%) patients discontinued it due to side effects. HEV-RNA clearance occurred in 29 patients (85%; 85% in acute and 86% in chronic infection). HEV was considered a cause of death in 3 (9%), with 2 cases with late diagnosis. Reduction of immunosuppression in those receiving it, and ribavirin treatment in those with chronic infection were associated with shorter time to HEV-RNA clearance. Policy on HEV testing varied between the centers. In conclusion, acute and chronic HEV hepatitis should be promptly diagnosed and managed in SCT recipients.

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Fig. 1: Management and outcome of patients diagnosed with acute and chronic HEV infection.

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Contributions

Conceptualization and design: MM, O.P., JS; collection and assembly of data: LW, NK; Data analysis: MM, O.P., DA; Provision of patients, data interpretation: MM, JJC, NB, JP, NK, AB, CK, MB, JLP, HLW, HG, MAD, AS, DA, RC, J.S. Manuscript writing: MM. All the authors have read and approved the published version of the manuscript.

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Correspondence to Malgorzata Mikulska.

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OP has no conflict of interests directly related to this manuscript. He has received honoraria or travel support from Astellas, Gilead, Jazz, MSD, Neovii Biotech, Novartis, Pfizer and Therakos. He has received research support from Gilead, Incyte, Jazz, Neovii Biotech and Takeda. He is member of advisory boards to Jazz, Gilead, MSD, Omeros, Priothera, Shionogi and SOBI. All other authors: nothing to declare.

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Mikulska, M., Penack, O., Wendel, L. et al. HEV infection in stem cell transplant recipients—retrospective study of EBMT Infectious Diseases Working Party. Bone Marrow Transplant 57, 167–175 (2022). https://doi.org/10.1038/s41409-021-01497-2

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