Direct-test PCR for detection of meningococcal DNA and its serogroup characterization: standardization and adaptation for use in a public health laboratory.
J Med Microbiol
; 52(Pt 9): 793-799, 2003 Sep.
Article
en En
| MEDLINE
| ID: mdl-12909657
ABSTRACT
A direct PCR test (DT-PCR) was established to detect Neisseria meningitidis DNA in clinical samples from patients with suspected bacterial meningitis. Specific primers for the 16S rDNA of N. meningitidis were designed to amplify a 600 bp DNA fragment. One hundred and ninety-three clinical samples were analysed, corresponding to 114 samples from patients diagnosed as positive and 79 as negative for infection by N. meningitidis using conventional methods (culture, latex agglutination and counterimmunoelectrophoresis). These samples were submitted to PCR by two different clinical sample preparation approaches (with and without DNA extraction and purification) and submitted to different PCR protocols to improve the results. In agarose gel detection, the sensitivity value for DT-PCR was 88.5 % and, using dot-blot DNA detection, the sensitivity increased to 96.4 %. The detection limit for meningococcus in cerebrospinal fluid was 2x10(2) c.f.u. ml(-1). Serogroup prediction was done using a multiplex PCR protocol and the sensitivity was 83 % for agarose gel DNA detection and 96.4 % using dot-blot DNA detection.
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Reacción en Cadena de la Polimerasa
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Meningitis Meningocócica
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Neisseria meningitidis
Tipo de estudio:
Diagnostic_studies
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Evaluation_studies
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Guideline
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Prognostic_studies
Límite:
Humans
Idioma:
En
Año:
2003
Tipo del documento:
Article