Enterovirus A89 (EV-A89) is a novel member of the EV-A species. To date, only one full-length genome sequence (the prototype strain) has been published. Here, we report the molecular identification and genomic characterization of a Chinese EV-A89 strain, KSYPH-TRMH22F/XJ/CHN/2011, isolated in 2011 from a contact of an acute flaccid paralysis (AFP) patient during AFP case surveillance in Xinjiang China. This was the first report of EV-A89 in China. The VP1 coding sequence of this strain demonstrated 93.2% nucleotide and 99.3% amino acid identity with the EV-A89 prototype strain. In the P2 and P3 regions, the Chinese EV-A89 strain demonstrated markedly higher identity than the prototype strains of EV-A76, EV-A90, and EV-A91, indicating that one or more recombination events between EV-A89 and these EV-A types might have occurred. Long-term evolution of these EV types originated from the same ancestor provides the spatial and temporal circumstances for recombination to occur. An antibody seroprevalence survey against EV-A89 in two Xinjiang prefectures demonstrated low positive rates and low titres of EV-A89 neutralization antibody, suggesting limited range of transmission and exposure to the population. This study provides a solid foundation for further studies on the biological and pathogenic properties of EV-A89.Human enterovirus (EV) infections are usually asymptomatic or bring about only mild disease, such as the common cold or minor undifferentiated febrile illnesses. However, EVs are associated with outbreaks of more serious disease such as acute flaccid paralysis (AFP), acute haemorrhagic conjunctivitis, aseptic meningitis, encephalitis, myocarditis, and hand, foot, and mouth disease (HFMD) [1][2][3][4] , which result in considerable morbidity and occasionally in mortality.EVs belong to the picornaviridae family and fall within the new order Picornavirales, which represents small non-enveloped RNA viruses with a single stranded positive-sense genome of approximately 7500 nucleotides 5 . The EV genome consists of a single open reading frame (ORF) flanked by 5′ and 3′ untranslated regions (UTRs). The ORF is translated into a single, large polyprotein of 2200 amino acids (aa), which is subsequently cleaved by viral proteases into one capsid protein region (P1) and two non-structural regions (P2 and P3). The P1 region encodes four viral capsid proteins: viral protein 1-4 (VP1-VP4), and the P2 and P3 regions encode seven non-structural proteins 2A-2C and 3A-3D, respectively 6 . The 5′ -UTR is about 740 nucleotides long and has an internal ribosome entry site (IRES) that is indispensable for translation initiation 7,8 . The approximately 100 nucleotide 3′ -UTR, located between the ORF and the poly (A) stretch, forms highly conserved secondary and tertiary structures that are involved in RNA replication 9 . Currently, more than 100 human EV serotypes have been described. They are currently classified into four species, EV-A, EV-B, EV-C, and EV-D, according to their genomic characteristics 5,10,11 . The classificatio...