[Genetic Characterization of Coxsackievirus A6 Strains Isolated in Ningxia Region, China, 2013~2015]

Bing Du Xue Bao. 2016 Nov;32(6):702-6.
[Article in Chinese]

Abstract

To study the genetic characteristics of coxsackievirus (CV)-A6 strains isolated from hand, food and mouth(HFMD)cases in Ningxia Province, China, in 2013~2015.A total of 998 specimens identified as non-EV71,non-CVA16 enteroviruses by real-time polymerase chain reaction were collected in 2013~2015and cultured using RD cells. The viral protein(VP)1gene of isolated strains was amplified by reverse transcription-polymerase chain reaction with degenerate primers and sequenced.Sequences were compared using the GenBank database by the BLAST algorithm to identify virus genotypes. All CV-A6 stains identified underwent homologous comparison and phylogenetic analyses. A total of 227 virus strains were isolated from 998 clinical specimens, and 61 stains were identified as CV-A6.Homologies of nucleotides and amino acids among Ningxia CV-A6 strains were 96.1%~99.8% and 98%~100%,respectively.The nucleotide homogeneity of Ningxia CV-A6 strains with Gudla strains, and the similarity of nucleotides and amino-acid sequences with VP1 of CV-A6 were 82.0%~83.5% and 93.8%~95.7%,respectively.CVA6 was the main pathogen of HFMD apart from EV71 and CV-A16 in Ningxia Province in 2013~2015.

MeSH terms

  • China
  • Enterovirus A, Human / classification
  • Enterovirus A, Human / genetics*
  • Enterovirus A, Human / isolation & purification
  • Genotype
  • Hand, Foot and Mouth Disease / virology*
  • Humans
  • Phylogeny