This prospective, multi-center study investigated the role of human herpesvirus 6B (HHV-6B) in post-transplant pneumonia. Researchers found HHV-6B DNA and mRNA in a significant portion of bronchoalveolar lavage samples, establishing viral load thresholds predictive of active infection and increased mortality risk. Analysis of host gene expression revealed distinct transcriptional signatures associated with HHV-6B detection, particularly in patients with idiopathic pneumonia syndrome. These findings strongly implicate HHV-6B as a pulmonary pathogen following allogeneic hematopoietic cell transplantation, warranting further clinical consideration. The study utilized multiple molecular diagnostic techniques and RNA sequencing to analyze paired blood and BALF samples. Created with NotebookLM by Google so there may be mistakes and/or errors. PMID: 38228644 Hill JA, Lee YJ, Vande Vusse LK, et al. HHV-6B detection and host gene expression implicate HHV-6B as pulmonary pathogen after hematopoietic cell transplant. Nat Commun 2024;15(1):542.

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