Isolation and characterization of a type 2 vaccine-derived poliovirus from environmental surveillance in China, 2012

PLoS One. 2013 Dec 26;8(12):e83975. doi: 10.1371/journal.pone.0083975. eCollection 2013.

Abstract

Environmental surveillance of poliovirus on sewage has been conducted in Shandong Province, China since 2008. A type 2 vaccine-derived poliovirus (VDPV) with 7 mutations in VP1 coding region was isolated from the sewage collected in the city of Jinan in December 2012. The complete genome sequencing analysis of this isolate revealed 25 nucleotide substitutions, 7 of which resulted in amino acid alteration. No evidence of recombination with other poliovirus serotypes was observed. The virus did not lose temperature sensitive phenotype at 40°C. An estimation based on the evolution rate of the P1 coding region suggested that evolution time of this strain might be 160-176 days. VP1 sequence analysis revealed that this VDPV strain is of no close relationship with other local type 2 polioviruses (n=66) from sewage collected between May 2012 and June 2013, suggesting the lack of its circulation in the local population. The person who excreted the virus was not known and no closely related virus was isolated in local population via acute flaccid paralysis surveillance. By far this is the first report of VDPV isolated from sewage in China, and these results underscore the value of environmental surveillance in the polio surveillance system even in countries with high rates of OPV coverage.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • China
  • Environmental Monitoring*
  • Evolution, Molecular
  • Genome, Viral / genetics
  • Phenotype
  • Phylogeny
  • Poliovirus / genetics
  • Poliovirus / immunology*
  • Poliovirus / isolation & purification*
  • Poliovirus Vaccines*
  • Sewage / virology
  • Temperature
  • Vaccination

Substances

  • Poliovirus Vaccines
  • Sewage

Grants and funding

This study was supported by the National Natural Science Foundation of China (project no. 81302481)(http://www.nsfc.gov.cn) and a grant for Research on Emerging and Re-emerging Infectious Diseases from the Ministry of Health, Labor and Welfare of Japan (http://www.mhlw.go.jp/english/). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.