Detection of enterovirus 68 as one of the commonest types of enterovirus found in patients with acute respiratory tract infection in China.
JOURNAL OF MEDICAL MICROBIOLOGY(2014)
Abstract
Human enterovirus 68 (HEV-68) is an enterovirus associated with respiratory illness. In China, no information about HEV-68 is available for children yet. This study aimed to investigate the presence of HEV-68 in mainland China between 2009 and 201 2 and to explore the migration events of HEV-68 across the world. Among 1565 samples tested from children, 41 (2.6 %) were positive for HEV and 223 (14.3%) for human rhinovirus (HRV). Seven (17.1 %) of 41 HEVs were HEV-68. Two HEV-68- and five HRV-positive samples were detected in 585 adult samples. HEV-68 is the predominant type of enterovirus in children with acute respiratory tract infection (ARTI), followed by HEV-71 and coxsackievirus A6. Three HEV-68-infected children presented with severe pneumonia and one presented with a severe asthma attack. The viruses were attributed to two novel distinct sublineages of HEV-68 based on phylogenetic analysis of partial VP1 gene sequences. Migration events analysis showed that the USA and the Netherlands were possible geographical sources of HEV-68, from where three strains migrated to China. In conclusion, HEV-68 may play a predominant role among the enteroviruses associated with ARTI in children. Additional surveillance is needed to clarify the reason why HEV-68 causes such a wide spectrum of disease, from asymptomatic to severe respiratory disease and even death.
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Key words
enterovirus,acute respiratory tract infection
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