Publication: Genomic non-coding regions reveal hidden patterns of mumps virus circulation in Spain, 2005 to 2015
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ISSN: 1560-7917
Publication date
2018
Authors
Gavilán, Ana M ISCIII 
Fernandez-Garcia, Aurora ISCIII 
Castellanos-Nadal, Ana Maria ISCIII
Masa-Calles, Josefa ISCIII
Lopez-Perea, Noemi ISCIII
De Ory, Fernando de ISCIII
Echevarria, Juan Emilio ISCIII 
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Publisher
European Centre for Disease Prevention and Control (ECDC)
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Abstract
BackgroundSince mumps vaccination was introduced in 1981 in Spain, the incidence of the disease has dropped significantly. However, cyclic epidemic waves and outbreaks still occur, despite high vaccination coverage. The World Health Organization (WHO) recommends genotyping to trace the pattern of mumps virus (MuV) circulation. Genotype H was predominant in Spain, but was replaced in 2005 by genotype G which has subsequently remained dominant. Of the small hydrophobic protein gene sequences, 78% are identical and belong to the MuVi/ Sheffield.GBR.1.05/[G]-variant. Aim: Our study aimed to investigate whether the circulation of MuV strains in Spain was continuous after the emergence of genotype G in 2005. Method: We obtained 46 samples from Spanish patients infected with MuVi/Sheffield.GBR.1.05/[G] during two epidemic waves and analysed them using new molecular markers based on genomic non-coding regions (NCRs) that discriminate subvariants of this virus strain. Results: Phylogenetic analyses of the nucleoprotein-phosphoprotein and matrix protein-fusion protein NCR indicated strain replacement after a drop in incidence in 2009, which had not been detectable by SH sequencing. Clustering of sequences from patients epidemiologically linked in the same outbreak suggests a potential use for these NCRs in outbreak characterisation. Conclusion: We suggest to consider their use in conjunction with the SH gene in the future WHO recommendations for MuV epidemiological surveillance.
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Keywords
PCR Genotype G Molecular epidemiology Molecular methods Mumps virus Non-coding regions
MeSH Terms
Cluster Analysis Genomics Genotype Humans Molecular Epidemiology Molecular Sequence Data Mumps Mumps virus Phylogeny RNA, Untranslated RNA, Viral Sequence Analysis, DNA Spain Disease Outbreaks
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Bibliographic citation
Euro Surveill. 2018 Apr;23(15):17-00349.