Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2021 Oct;27(10):2742-2745.
doi: 10.3201/eid2710.211039.

Human Infection with Avian Influenza A(H9N2) Virus, Cambodia, February 2021

Human Infection with Avian Influenza A(H9N2) Virus, Cambodia, February 2021

Samnang Um et al. Emerg Infect Dis. 2021 Oct.

Abstract

In February 2021, routine sentinel surveillance for influenza-like illness in Cambodia detected a human avian influenza A(H9N2) virus infection. Investigations identified no recent H9N2 virus infections in 43 close contacts. One chicken sample from the infected child's house was positive for H9N2 virus and genetically similar to the human virus.

Keywords: A(H9N2); Cambodia; One Health; avian influenza; influenza; respiratory infections; spillover; viruses; zoonoses.

PubMed Disclaimer

Figures

Figure
Figure
Locations of human infection and timeline of key events in the One Health investigation, Cambodia, February–March 2021. Key points and findings are indicated next to dates. Sampling and testing results are indicated by icons (in key). ILI, influenza-like illness; NP, nasopharyngeal; qRT-PCR, quantitative reverse transcription PCR.

References

    1. Carnaccini S, Perez DR. H9 Influenza Viruses: An Emerging Challenge. Cold Spring Harb Perspect Med. 2020;10:a038588. 10.1101/cshperspect.a038588 - DOI - PMC - PubMed
    1. Group SHW; SJCEIRS H9 Working Group. Assessing the fitness of distinct clades of influenza A (H9N2) viruses. Emerg Microbes Infect. 2013;2:e75. - PMC - PubMed
    1. Peiris M, Yuen KY, Leung CW, Chan KH, Ip PL, Lai RW, et al. Human infection with influenza H9N2. Lancet. 1999;354:916–7. 10.1016/S0140-6736(99)03311-5 - DOI - PubMed
    1. World Health Organization. Antigenic and genetic characteristics of zoonotic influenza A viruses and development of candidate vaccine viruses for pandemic preparedness; 2021. [cited 2021 March 30]; https://www.who.int/influenza/vaccines/virus/202103_zoonotic_vaccineviru...
    1. Pu J, Yin Y, Liu J, Wang X, Zhou Y, Wang Z, et al. Reassortment with dominant chicken H9N2 influenza virus contributed to the fifth H7N9 virus human epidemic. J Virol. 2021;JVI.01578-20. - PMC - PubMed

Publication types