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  • Title: Detection and characterisation of human metapneumovirus from children with acute respiratory symptoms in north-west England, UK.
    Author: Hopkins MJ, Redmond C, Shaw JM, Hart IJ, Hart CA, Smyth RL, Semple MG.
    Journal: J Clin Virol; 2008 Jul; 42(3):273-9. PubMed ID: 18455957.
    Abstract:
    BACKGROUND: Human metapneumovirus (hMPV) causes a spectrum of respiratory disease ranging from trivial coryzal symptoms to fatal pneumonia, with a predilection for the very young, the immune suppressed and the frail elderly. Five distinct lineages of the virus genome have been described. OBJECTIVES: To develop and evaluate a sensitive, real-time PCR (RT-PCR) assay capable of detecting all lineages of hMPV, suitable for use in a diagnostic laboratory. STUDY DESIGN: An RT-PCR assay was developed using novel primers and dual-labelled minor-groove-binding (MGB) probes complementary to consensus sequences. The assay and two alternative assays were tested against external quality assurance (EQA) panels. 221 respiratory samples collected during 2003-2004 were screened using the new assay. hMPV positive samples were sequenced and phylogenetically analysed. RESULTS: Three genetic lineages of hMPV were detected during 2003-2004. Incidence was low (2.3%) compared to previous years. All five lineages had been present in the same community within the past 3 years. CONCLUSIONS: The new assay correctly identified more EQA samples, including those at greatest dilution, than the alternative assays and detected all five lineages. Seasonal circulation of hMPV in paediatric patients with acute respiratory symptoms is dynamic with respect to incidence and viral genotype.
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