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- W3030740055 abstract "Objective To establish TaqMan real-time PCR method for detection and identification of Haemophilus influenzae and Streptococcus pneumonia. Methods Two sets of primers and FAM-labeled probes targeting different genes of Haemophilus influenzae and Streptococcus pneumoniae were designed and synthesized. The bexA gene was used for identification of Haemophilus influenzae and lytA for Streptococcus pneumoniae. The sensitivity and specificity of real-time PCR were assessed for different primers and probes. Cut-off values of cycle threshold (Ct) were determined. Two hundred and seventy-eight cerebrospinal fluid (CSF) specimens from suspected bacterial meningitis cases were detected by real-time PCR assay, latex agglutination test and bacteria culture simultaneously. Results Haemophilus influenzae isolates of serotype a to d could be detected and identified by bexA primers and probe. All Streptococcus pneumoniae isolates of different serotypes could be detected and identified by lytA primers and probe. The respective sensitivities for Haemophilus influenzae and Streptococcus pneumoniae were 10 and 90 genome DNA copies in each PCR reaction. Of the 278 CSF specimens, four were positive by Haemophilus influenzae and seven positive by Streptococcus pneumoniae when detected by real-time PCR. Of the four Haemophilus influenzae positive specimens, two were positive by culture and one positive hy latex. Of the seven Streptococcus pneumonia positive specimens, two were positive by culture and two positive by latex. Conclusions Real-time PCR could rapidly detect and identify Haemophilus influenzae of serotype a to d and Streptococcus pneumoniae of different serotypes with high sensitivity. TaqMan real-time PCR could be widely used for the diagnosis of invasive meningitis caused by Haemophilus influenzae and Streptococcus pneumoniae. It can improve the rate of positivity for diagnosis of suspicious bacterial meningitis cases.Key words: Haemophilas influenzae; Streptococcus pneumoniae; Polymerase chain reaction" @default.
- W3030740055 created "2020-06-05" @default.
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- W3030740055 date "2009-03-11" @default.
- W3030740055 modified "2023-09-22" @default.
- W3030740055 title "Establishment and applying of TaqMan real-time PCR for detection and identification of Haemophilus influenzae and Streptococcus pneumoniae" @default.
- W3030740055 doi "https://doi.org/10.3760/cma.j.issn.1009-9158.2009.03.006" @default.
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