Prevalence and molecular characterizations of enterovirus D68 among children with acute respiratory infection in China between 2012 and 2014

Sci Rep. 2015 Nov 16:5:16639. doi: 10.1038/srep16639.

Abstract

EV-D68 is associated with respiratory tract infections (RTIs). Since its first isolation, EV-D68 has been detected sporadically. However, the US and Canada have experienced outbreaks of EV-D68 infections between August and December 2014. This study aimed to investigate the molecular epidemiology and clinical characteristics of EV-D68 in Chongqing, Southwestern China. From January 2012 to November 2014, 1876 nasopharyngeal aspirate specimens (NPAs) were collected from hospitalized children with RTIs. Among the 1876 NPAs, EV-D68 was detected in 19 samples (1.0%, 19/1876). Of these, 13 samples were detected in September and October 2014 (9.8%, 13/132). Phylogenetic analysis showed that all 13 strains detected in the 2014 Chongqing had high homology with the main strains of the 2014 US outbreak. Among the children with EV-D68 infection, 13 (68%) had a history of recurrent wheezing. A total of 13 children had a discharge diagnosis of asthma. Of these, 11 children were diagnosed with acute asthma exacerbation. EV-D68 was the predominant pathogen that evoked asthma exacerbation in September and October 2014. In conclusion, our results found that a history of recurrent wheezing may be a risk factor for the detection of EV-D68 and viral-induced asthma exacerbation may be a clinical feature of EV-D68 infection.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • 5' Untranslated Regions
  • Acute Disease
  • Asthma / diagnosis
  • Base Sequence
  • Child
  • Child, Preschool
  • China / epidemiology
  • Disease Outbreaks
  • Enterovirus D, Human / classification
  • Enterovirus D, Human / genetics*
  • Enterovirus D, Human / isolation & purification
  • Enterovirus Infections / epidemiology*
  • Enterovirus Infections / pathology
  • Enterovirus Infections / virology*
  • Female
  • Humans
  • Infant
  • Male
  • Phylogeny
  • Prevalence
  • Recurrence
  • Respiratory Sounds / diagnosis
  • Respiratory Tract Infections / epidemiology*
  • Respiratory Tract Infections / pathology
  • Respiratory Tract Infections / virology*
  • Sequence Analysis, RNA
  • Viral Proteins / genetics

Substances

  • 5' Untranslated Regions
  • Viral Proteins