Real-time detection of Mycoplasma pneumoniae in respiratory samples with an internal processing control.

Real-time PCR was employed to detect a region of the P1 cytadhesin gene of Mycoplasma pneumoniae in clinical samples. An internal processing control was included that could be co-amplified simultaneously in the same reaction tube. The assay could reproducibly detect 1 x 10(3) M. pneumoniae organisms ml(-1) in clinical samples. There was no amplification of DNA or signal production from 15 other species of human mycoplasmas and 19 other bacterial species. Using a panel of 175 respiratory samples taken from patients with pneumonia of proven aetiology, the sensitivity was found to be 60 % and the specificity of the assay 96.7 % when compared with serology. This assay is suitable for same-day diagnosis of M. pneumoniae infection and batch processing of respiratory samples for clinical screening.

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