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Journal of Clinical Microbiology, February 2001, p. 506-508, Vol. 39, No. 2
Institute of
Microbiology,1 Institute of
Dermatology,2 and Transplant
Unit,3 Università Cattolica del Sacro
Cuore, 00168 Rome, Italy
Received Recieved 4 October 2000/Returned for modification 26 October
2000/Accepted 6 December 2000
This study investigates the prevalence of human herpesvirus 8 (HHV-8) infection in kidney transplant patients, evaluating the risk of
HHV-8 transmission via transplantation and the association between pre-
and posttransplantation HHV-8 infection and the subsequent development
of Kaposi's sarcoma (KS). Immunofluorescence and an enzyme immunoassay
were used to determine HHV-8 seroprevalence in 175 patients awaiting
kidney transplantation and 215 controls who were attending our clinic
for other reasons. All patients in the study came from central or
southern Italy. Seroprevalence was similar in both groups (14.8 versus
14.9%), with no significant difference between the rates for male and
female patients. Of the 175 patients, 100 were tested for anti-HHV-8
antibodies at various times during follow-up. During follow-up,
seroprevalence increased from 12% on the date of transplantation to
26%. This increase was paralleled by an age-related increase in
seroprevalence in the control group. During follow-up from 3 months to
10 years after transplantation, KS was diagnosed in seven patients
(4.0%). Six of these patients were positive for HHV-8 prior to
transplantation. Overall, 23.0% of patients who were HHV-8 positive
before transplantation developed KS, whereas only 0.7% of seronegative
patients developed the disease (relative risk, 34.4; 95% confidence
interval, 4.31 to 274.0). This finding suggests that the key risk
factor for KS is infection prior to transplantation and that antibody
detection in patients awaiting transplantation could be useful in
identifying patients at high risk for KS. In patients from geographic
areas with a high prevalence of HHV-8, serological tests on donors may be less important.
0095-1137/01/$04.00+0 DOI: 10.1128/JCM.39.2.506-508.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.
Kaposi's Sarcoma Associated with Previous Human Herpesvirus 8 Infection in Kidney Transplant Recipients
*
Corresponding author. Mailing address: Istituto di
Microbiologia, Università Cattolica del Sacro Cuore, Largo F. Vito 1, 00168 Rome, Italy. Phone: 39-06-30154964. Fax: 39-06-3051152. E-mail: p_universi{at}libero.it.
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