Historical prevalence and distribution of avian influenza virus A(H7N9) among wild birds

Sarah H. Olson, Martin Gilbert, Ming Chu Cheng, Jonna A Mazet, Damien O. Joly

Research output: Contribution to journalArticle

9 Scopus citations


We examined 48 published studies for which sample sizes could be ascertained to determine the historic prevalence of influenza A(H7N9) virus in wild bird populations and reviewed GenBank data to further establish its distribution. Low prevalence (0.0093%) in Asia suggests > 30,000 samples would be required to detect the H7N9 subtype in wild birds.

Original languageEnglish (US)
Pages (from-to)2031-2033
Number of pages3
JournalEmerging Infectious Diseases
Issue number12
StatePublished - Dec 2013


ASJC Scopus subject areas

  • Microbiology (medical)
  • Infectious Diseases
  • Epidemiology

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