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Journal of Clinical Microbiology, Nov 1997, 2869-2872, Vol 35, No. 11
Copyright © 1997 by the American Society for Microbiology. All rights reserved.

Molecular evidence and clinical significance of herpesvirus coinfection in the central nervous system [In Process Citation]

YW Tang, MJ Espy, DH Persing and TF Smith
Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, Minnesota 55905, USA.

A total of 60 cerebrospinal fluid (CSF) specimens from patients manifesting symptoms resembling viral central nervous system (CNS) disease were examined for the presence of herpes simplex virus (HSV), human herpesvirus 6 (HHV-6), Epstein-Barr virus (EBV), cytomegalovirus, varicella-zoster virus, Borrelia burgdorferi, and Tropheryma whippelii DNA by PCR. Of 30 specimens which were selected on the basis of HSV DNA positivity, 2 were concomitantly positive for HHV-6 DNA and 1 was positive for EBV DNA. In the three specimens positive for more than one herpesvirus, amplicons generated with virus-specific primer sets hybridized specifically to the corresponding virus-specific probe. Sequence analysis of the two amplified DNA fragments demonstrated that they were derived from distinct herpesviruses. Of 22 patients with clinically diagnosed encephalitis, 2 of 3 patients coinfected with HSV and HHV-6 died, compared to 1 of 19 (5%) patients infected with only HSV. Of 30 CSF specimens that were negative for HSV DNA, EBV DNA was detected in one sample. These data indicated the presence of DNA specific for two distinct herpesviruses in the same CSF specimen, providing molecular evidence that coinfection with this group of viruses may occur in the CNS.

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