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Br J Haematol. 2009 May;145(3):394-8. doi: 10.1111/j.1365-2141.2009.07622.x. Epub 2009 Feb 17.

HHV-6 DNA throughout the tissues of two stem cell transplant patients with chromosomally integrated HHV-6 and fatal CMV pneumonitis.

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Department of Paediatric Haematology and Oncology, 2nd Faculty of Medicine and Motol University Hospital, Charles University, Prague, The Czech Republic.


Two patients with the characteristic high human herpesvirus 6 (HHV-6) DNA loads in peripheral blood caused by chromosomally integrated (CI) virus received a haematopoietic stem cell transplant (HSCT) from a donor without CI HHV-6. Both patients died in consequence of cytomegalovirus (CMV) pneumonitis. At autopsy, high amounts of CMV DNA were detected in lungs but at much lower levels in other organs. In contrast HHV-6 DNA was detected at high levels throughout the organs with the exception of donor-derived haematopoietic tissue. In individuals with chromosomal integration, HHV-6 DNA is found in every tissue of recipient origin indicating inheritance through the germ line.

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