WHO: Human infection with avian influenza A(H9N2) virus - China
submited by kickingbird at Aug, 10, 2017 14:25 PM from WHO
On 30 June 2017, one case of human infection with avian influenza A(H9N2) virus was reported to WHO from China in a 2-month old female child who lives in Guangdong Province, China. She had onset of influenza-like illness (ILI) on 28 April 2017. The patient was hospitalized on 9 June. A sample collected from the patient on 13 June as part of ILI surveillance was laboratory-confirmed as positive for A(H9N2) influenza virus on 16 June. The patient was exposed to backyard poultry prior to illness. The case has fully recovered.
Risk Assessment
1. What is the likelihood that additional human cases of infection with avian influenza A(H9N2) viruses will occur? Most human cases are exposed to the A(H9N2) virus through contact with infected poultry or contaminated environments. Human infection tends to result in mild clinical illness. Since the virus continues to be detected in poultry populations, further human cases can be expected.
2. What is the likelihood of human-to-human transmission of avian influenza A(H9N2) viruses? No case clusters have been reported. Currently available epidemiological and virological evidence suggests that this virus has not acquired the ability of sustained transmission among humans, thus the likelihood is low.
What is the risk of international spread of avian influenza A(H9N2) virus by travellers? Should infected individuals from affected areas travel internationally, their infection may be detected in
6 Food and Agriculture Organization. H7N9 situation update. Available at: www.fao.org/ag/againfo/programmes/en/empres/H7N9/situation_update.html
4
another country during travel or after arrival. If this were to occur, further community level spread is considered unlikely as this virus has not acquired the ability to transmit easily among humans.
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Risk Assessment
1. What is the likelihood that additional human cases of infection with avian influenza A(H9N2) viruses will occur? Most human cases are exposed to the A(H9N2) virus through contact with infected poultry or contaminated environments. Human infection tends to result in mild clinical illness. Since the virus continues to be detected in poultry populations, further human cases can be expected.
2. What is the likelihood of human-to-human transmission of avian influenza A(H9N2) viruses? No case clusters have been reported. Currently available epidemiological and virological evidence suggests that this virus has not acquired the ability of sustained transmission among humans, thus the likelihood is low.
What is the risk of international spread of avian influenza A(H9N2) virus by travellers? Should infected individuals from affected areas travel internationally, their infection may be detected in
6 Food and Agriculture Organization. H7N9 situation update. Available at: www.fao.org/ag/againfo/programmes/en/empres/H7N9/situation_update.html
4
another country during travel or after arrival. If this were to occur, further community level spread is considered unlikely as this virus has not acquired the ability to transmit easily among humans.
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