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Enterovirus 71 (EV71) and coxsackievirus A16 (CA16) are the predominant pathogens causing outbreaks of hand, foot and mouth disease (HFMD) worldwide. Other human enterovirus A (HEV-A) serotypes tend to cause only sporadic HFMD cases. However, since a HFMD caused by coxsackievirus A6 broke out in Finland in 2008, CA6 has been identified as the responsible pathogen for a series of HFMD outbreaks in Europe, North America and Asia. Because of the severity of the clinical manifestations and the underestimated public health burden, the epidemic of CA6-associated HFMD presents a new challenge to the control of HFMD. This article reviewed the epidemic characteristics, molecular epidemiology, clinical features and laboratory diagnosis of CA6 infection. The genetic evolution of CA6 strains associated with HFMD was also analyzed. It indicated that the development of a multivalent vaccine combining EV71, CA16 and CA6 is an urgent necessity to control HFMD.
Bian et al. (Thu,) studied this question.