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  • Title: Detection of all four human metapneumovirus subtypes in nasopharyngeal specimens from children with respiratory disease in Uberlândia, Brazil.
    Author: Carneiro BM, Yokosawa J, Arbiza J, Costa LF, Mirazo S, Nepomuceno LL, Oliveira TF, Goulart LR, Vieira CU, Freitas GR, Paula NT, Queiróz DA.
    Journal: J Med Virol; 2009 Oct; 81(10):1814-8. PubMed ID: 19697417.
    Abstract:
    The human metapneumovirus (hMPV) is a pathogen of the respiratory tract identified first in the Netherlands in 2001 and since then it has been detected worldwide. The purpose of this study was to identify and characterize hMPV in samples collected from children <5 years presenting with acute respiratory disease (ARD) seen at a public hospital in Uberlândia, in Southeastern Brazil. One hundred fourteen nasopharyngeal aspirates (NPAs) samples that were negative for the presence of nine other respiratory viruses were tested by reverse transcription polymerase chain reaction (RT-PCR) for the presence of hMPV RNA. Fourteen out of 114 (12.3%) samples were positive for presence of hMPV RNA. PCR products, obtained by the amplification of partial nucleotide sequence of gene N, were sequenced and compared with sequences deposited in GenBank. Sequences from eight samples were obtained and all four subtypes were identified. Also, the recently proposed sublineages "a" and "b" of subtype A2 were found; mean age was 21 months old; upper respiratory tract infection (URTI) was the most common clinical symptom; the virus was detected in samples collected from March to November, a period that corresponds to late summer to mid-spring in Brazil. This is the first study to describe the circulation of all hMPV subtypes in Minas Gerais state.
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