title: [Human herpesvirus 7 infection in patients after allogeneic hematopoietic stem cell transplantation].
abstract: OBJECTIVE
  To study the prevalence of human herpesvirus 7 (HHV-7) infection in recipients following allogeneic hematopoietic stem cell transplantation (allo-HSCT).
  
  
  METHODS
  Peripheral blood samples were collected before and weekly after allo-HSCT from 72 consecutive recipients and 53 donors. Nested polymerase chain reaction (nPCR) was used to monitor HHV-7 DNAemia.
  
  
  RESULTS
  HHV-7 DNAemia was detected at least once in 86.1% (62/72) of the 72 patients on the median day 15.6 (7 approximately 56 days) after allo-HSCT. Continuing HHV-7 DNAemia (HHV-7 DNAemia maintained at least 4 weeks) was evidenced in 40.3% (29/72) of the patients after allo-HSCT. The prevalence of continuing HHV-7 DNAemia in the patients receiving HLA mismatched or HLA matched unrelated allo-HSCT who underwent conditioning with anti-thymocyte globulin (ATG) was 48.9% (23/47), significantly higher than that in the patients receiving HLA matched related allo-HSCT with conditioning without ATG [24% (6/25), P = 0.040]. Enhanced incidence the prevalence of HHV-7 DNAemia in the patients receiving corticosteroid after allo-HSCT was 44.6% (39/65), significantly higher than that in the patients who did not receive corticosteroid [0% (0/7), P = 0.037]. No relationship was observed between HHV-7 infection and transplant-related complications including acute graft versus host disease, hemorrhagic cystitis, cytomegalovirus and HHV-6 infection.
  
  
  CONCLUSIONS
  Common in allo-HSCT recipients, HHV-7 DNAemia is closely associated with conditioning with ATG and application of corticosteroid after allo-HSCT.
authors.affiliation: Peking University Institute of hematology, Peking University People's Hospital, Beijing 100044 China.
authors.forename: Li-ru
authors.initials: LR
authors.lastname: Wang
authors.forename: Lu-jia
authors.initials: LJ
authors.lastname: Dong
authors.forename: Dao-pei
authors.initials: DP
authors.lastname: Lu
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D002681:China / Q000453:epidemiology; D004279:DNA, Viral / Q000097:blood / Q000235:genetics; D005260:Female; D006086:Graft vs Host Disease / Q000821:virology; D018380:Hematopoietic Stem Cell Transplantation / Q000009:adverse effects / Q000379:methods*; D016199:Herpesvirus 7, Human / Q000235:genetics*; D006801:Humans; D008297:Male; D008875:Middle Aged; D016133:Polymerase Chain Reaction / Q000379:methods; D015995:Prevalence; D019349:Roseolovirus Infections / Q000453:epidemiology / Q000209:etiology*
chemical_list: D004279:DNA, Viral