W A Verstrepen1, P Bruynseels, A H Mertens. 1. Center for Molecular Diagnostics, OCMW Hospitals, AZ Middelheim, Lindendreef 1, B-2020 Antwerpen, Belgium.
Abstract
BACKGROUND: We previously described the characteristics of a single-tube real-time enterovirus reverse transcriptase polymerase chain reaction (RT-PCR) assay based on a fluorogenic probe and primers directed to highly conserved sequences in the 5'-untranslated region (UTR) of the enterovirus genome. OBJECTIVES: To evaluate the performance of the assay on a larger number of cerebrospinal fluid (CSF) specimens from patients suspected of having viral meningitis. STUDY DESIGN: Real-time enterovirus RT-PCR and viral culture were performed on CSF specimens received from March 2000 to November 2001. Patient records were retrospectively reviewed for final clinical diagnosis. RESULTS: From the 186 CSF specimens tested, culture was positive for enterovirus in 31 cases, whereas real-time RT-PCR detected enterovirus RNA in 45 CSF specimens. The sensitivity of real-time RT-PCR in relation to the clinical diagnosis of viral meningitis was 72.6%, whereas the sensitivity of viral culture reached only 57.4%. Enterovirus RNA was also found in a number of specimens with low leukocyte counts. CONCLUSIONS: We confirm that the real-time enterovirus RT-PCR assay for CSF specimens is significantly more sensitive than viral culture.
BACKGROUND: We previously described the characteristics of a single-tube real-time enterovirus reverse transcriptase polymerase chain reaction (RT-PCR) assay based on a fluorogenic probe and primers directed to highly conserved sequences in the 5'-untranslated region (UTR) of the enterovirus genome. OBJECTIVES: To evaluate the performance of the assay on a larger number of cerebrospinal fluid (CSF) specimens from patients suspected of having viral meningitis. STUDY DESIGN: Real-time enterovirus RT-PCR and viral culture were performed on CSF specimens received from March 2000 to November 2001. Patient records were retrospectively reviewed for final clinical diagnosis. RESULTS: From the 186 CSF specimens tested, culture was positive for enterovirus in 31 cases, whereas real-time RT-PCR detected enterovirus RNA in 45 CSF specimens. The sensitivity of real-time RT-PCR in relation to the clinical diagnosis of viral meningitis was 72.6%, whereas the sensitivity of viral culture reached only 57.4%. Enterovirus RNA was also found in a number of specimens with low leukocyte counts. CONCLUSIONS: We confirm that the real-time enterovirus RT-PCR assay for CSF specimens is significantly more sensitive than viral culture.
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