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Updated: Jul 10, 2026

Metagenomic Next-Generation Sequencing of Cerebrospinal Fluid for the Detection of Central Nervous System Pathogens
Published on: April 17, 2026
Prospective identification of enteroviruses involved in meningitis in 2006 through direct genotyping in cerebrospinal
Audrey Mirand1, Cécile Henquell, Christine Archimbaud
1Centre de Biologie-CHRU Clermont Ferrand, Laboratoire de Virologie, 58, Rue Montalembert, 63003 Clermont-Ferrand, France. amirand@chu-clermontferrand.fr
Abstract:
Enterovirus infections were investigated with special emphasis on performing rapid molecular identification of enterovirus serotypes responsible for aseptic meningitis directly in cerebrospinal fluid (CSF). Enterovirus genotyping was carried out directly with specimens tested for the diagnostic procedure, using two seminested PCR assays designed to amplify the complete and partial gene sequences encoding the VP1 and VP4/VP2 capsid proteins, respectively. The method was used for identifying the enterovirus serotypes involved in meningitis in 45 patients admitted in 2005. Enterovirus genotyping was achieved in 98% of the patients studied, and we obtained evidence of 10 of the most frequent serotypes identified earlier by genotyping of virus isolates. The method was applied for the prospective investigation of 54 patients with meningitis admitted consecutively in 2006. The enterovirus serotypes involved were identified with the cerebrospinal fluid (CSF) of 52 patients (96%) and comprised 13 serotypes within the human enterovirus B species and 1 within the human enterovirus A species. The three most common serotypes were echovirus 13 (E13; 24%), E6 (23%), and coxsackievirus B5 (11.5%), a pattern different from that observed in 2005. Genotyping of virus isolates was also performed in 35 patients in 2006 (meningitis, n = 31; other diseases, n = 4). By comparison, direct genotyping in CSF yielded a more complete pattern of enterovirus serotypes, thereby allowing the detection of rare serotypes: three less common serotypes (CB2, E21, and E27) were not detected by indirect genotyping alone. The study shows the feasibility of prospective enterovirus genotyping within 1 week in a laboratory setting.
Insights
Rapid molecular identification of enterovirus serotypes in cerebrospinal fluid (CSF) enables quick diagnosis of aseptic meningitis. This direct genotyping method in CSF provides a more complete picture of enterovirus types than traditional methods.
Area of Science:
- Virology
- Molecular Biology
- Infectious Diseases
Background:
- Enterovirus infections are a common cause of aseptic meningitis.
- Accurate and rapid identification of enterovirus serotypes is crucial for patient management and epidemiological studies.
- Traditional methods for enterovirus identification often rely on virus isolation, which can be time-consuming.
Purpose of the Study:
- To develop and evaluate a rapid molecular method for identifying enterovirus serotypes directly in cerebrospinal fluid (CSF).
- To compare the effectiveness of direct CSF genotyping with traditional virus isolate genotyping for aseptic meningitis cases.
Main Methods:
- Two seminested PCR assays were designed to amplify VP1 and VP4/VP2 capsid protein gene sequences.
- The method was applied to CSF samples from patients with meningitis in 2005 and 2006.
- Genotyping of virus isolates was performed for comparison.
Main Results:
- Direct enterovirus genotyping in CSF achieved high success rates (98% in 2005, 96% in 2006).
- The study identified 10 frequent serotypes in 2005 and 13 human enterovirus B species and 1 human enterovirus A species serotype in 2006.
- Direct CSF genotyping detected rare serotypes missed by indirect genotyping, revealing a different serotype pattern in 2006 compared to 2005.
Conclusions:
- Direct molecular identification of enterovirus serotypes in CSF is feasible and efficient for diagnosing aseptic meningitis.
- This method offers a more comprehensive understanding of circulating enterovirus serotypes, including rare ones.
- Prospective enterovirus genotyping directly from CSF can be completed within one week in a laboratory setting.
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