title: A lack of serologic evidence of transmission of Chlamydia pneumoniae by transfusion of buffy coat-depleted RBCs.
abstract: BACKGROUND
  Recent studies have shown that a high percentage of blood donors harbor Chlamydia pneumoniae DNA and antigens within their PBMNCs. The aim of the present study was to investigate whether recipients of RBC transfusions who were seronegative for C. pneumoniae before transfusion showed any evidence of seroconversion after transfusion.
  
  
  METHODS
  Patients who were possible recipients of RBC transfusion and negative in a screen test for IgG antibodies against C. pneumoniae at the time of blood group determination were candidates to be included in the study. The patients were contacted 3.0 to 3.5 months after the blood group determination, and those who accepted to participate agreed that another venous blood sample could be taken.
  
  
  RESULTS
  Among the patients who participated, 53 had become recipients of RBC transfusion (transfused group), and 51 later did not receive any RBC transfusion (control group). No significant change was found in IgG titer against C. pneumoniae between the first and the second sample from the same patient, in either the transfused group or the control group.
  
  
  CONCLUSIONS
  In our study, which was limited to 53 seronegative recipients of RBC units from seropositive donors, we found no serologic evidence that C. pneumoniae could be transmitted by RBC transfusion.
authors.affiliation: Department of Clinical Bacteriology, Huddinge University Hospital, F71, SE-141 86 Stockholm, Sweden. goran.hedin@hs.se
authors.forename: Göran
authors.initials: G
authors.lastname: Hedin
authors.forename: Iréne
authors.initials: I
authors.lastname: Eriksson
authors.forename: Urban
authors.initials: U
authors.lastname: Kumlin
authors.forename: Jens
authors.initials: J
authors.lastname: Boman
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002648:Child; D002690:Chlamydia Infections / Q000635:transmission*; D016993:Chlamydophila pneumoniae / Q000276:immunology; D017707:Erythrocyte Transfusion / Q000009:adverse effects*; D005260:Female; D006801:Humans; D007074:Immunoglobulin G / Q000032:analysis; D008297:Male; D008875:Middle Aged
chemical_list: D007074:Immunoglobulin G