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Journal of Clinical Microbiology, May 1999, p. 1298-1301, Vol. 37, No. 5
Centers for Disease Control and Prevention, Atlanta,
Georgia1; Thomas Jefferson University,
Philadelphia, Pennsylvania2; Chester
Beatty Laboratories, Institute of Cancer Research, London, United
Kingdom3; Fred Hutchinson Cancer
Research Center, Seattle, Washington4;
Institute of Microbiology, University of Ferrara, Ferrara,
Italy5; and University of Nebraska,
Lincoln, Nebraska6
Received 15 October 1998/Returned for modification 7 December
1998/Accepted 26 January 1999
Reported prevalences of human herpesvirus 8 (HHV-8) (Kaposi's
sarcoma-associated herpesvirus) in semen have ranged widely. This is
possibly due to differences in assay sensitivity, geographic or
population-based differences in the true presence of the virus in
semen, and PCR contamination. This study assessed interlaboratory sensitivity and reproducibility in the analysis of blinded experimental panels, each consisting of 48 specimens and being composed of semen
specimens from different healthy artificial-insemination donors
(n = 30) and human immunodeficiency virus
(HIV)-infected patients (n = 7) plus positive
(n = 4) and negative (n = 7)
controls. The experimental panels analyzed in each laboratory were
identical except for being independently coded. Of 10 experiments done
in five laboratories, 5 experiments from three laboratories had
evidence of PCR contamination; all instances of contamination were in
the context of nested PCR procedures. In the experiments with no
false-positive results, HHV-8 DNA was detected in three (8%) of the 37 semen specimens (two from artificial-insemination donors and one from an HIV-positive patient) but in only 3 (1.6%) of the 184 PCRs in which
these specimens were analyzed. This suggests that HHV-8 DNA is present
in semen at concentrations that can be too low to allow its consistent
detection. This study emphasizes the importance of performing blinded,
multi-institution experiments to provide a coherent basis for comparing
results and to motivate standardization of methods.
0095-1137/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.
Multicenter Comparison of PCR Assays for Detection
of Human Herpesvirus 8 DNA in Semen

*
Corresponding author. Mailing address: Centers for
Disease Control and Prevention, 1600 Clifton Rd., G18, Atlanta, GA
30333. Phone: (404) 639-2186. Fax: (404) 639-0049. E-mail:
php1{at}cdc.gov.
Present address: Istituto Superiore Sanitá, Laboratory of
Virology, Rome, Italy.
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