ArticleBMC infectious diseases2014
A family cluster of three confirmed cases infected with avian influenza A (H7N9) virus in Zhejiang Province of China.
Article in BMC infectious diseases, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.
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11 citing papers in PubMed, 21 citations in OpenAlex.
- Occupational Risk from Avian Influenza Viruses at Different Ecological Interfaces Between 1997 and 2019.Microorganisms · 2025Review
- The viral distribution and pathological characteristics of BALB/c mice infected with highly pathogenic Influenza H7N9 virus.Virology journal · 2021Article
- H7N9 Influenza Virus in China.Cold Spring Harbor perspectives in medicine · 2021Review
- A hospital cluster combined with a family cluster of avian influenza H7N9 infection in Anhui Province, China.The Journal of infection · 2019Article
- Article
- Spatio-temporal pattern analysis for evaluation of the spread of human infections with avian influenza A(H7N9) virus in China, 2013-2014.BMC infectious diseases · 2017Article
- Epidemiological, clinical, and virologic features of two family clusters of avian influenza A (H7N9) virus infections in Southeast China.Scientific reports · 2017Article
- Comparative Epidemiology of Human Fatal Infections with Novel, High (H5N6 and H5N1) and Low (H7N9 and H9N2) Pathogenicity Avian Influenza A Viruses.International journal of environmental research and public health · 2017Article
- Differences in the epidemiology and virology of mild, severe and fatal human infections with avian influenza A (H7N9) virus.Archives of virology · 2016Article
- Differences in the Epidemiology of Childhood Infections with Avian Influenza A H7N9 and H5N1 Viruses.PloS one · 2016Article
- Nosocomial transmission of avian influenza A (H7N9) virus in China: epidemiological investigation.BMJ (Clinical research ed.) · 2015Article
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13 authors at 4 institutions in 3 countries.
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Abstract
backgroundA total of 453 laboratory-confirmed cases infected with avian influenza A (H7N9) virus (including 175 deaths) have been reported till October 2,2014, of which 30.68% (139/453) of the cases were identified from Zhejiang Province. We describe the largest reported cluster of virologically confirmed H7N9 cases, comprised by a fatal Index case and two mild secondary cases.
methodsA retrospective investigation was conducted in January of 2014. Three confirmed cases, their close contacts, and relevant environments samples were tested by real-time reverse transcriptase-polymerase chain reaction (RT-PCR), viral culture, and sequencing. Serum samples were tested by haemagglutination inhibition (HI) assay.
resultsThe Index case, a 49-year-old farmer with type II diabetes, who lived with his daughter (Case 2, aged 24) and wife (Case 3, aged 43) and his son-in-law (H7N9 negative). The Index case and Case 3 worked daily in a live bird market. Onset of illness in Index case occurred in January 13, 2014 and subsequently, he died of multi-organ failure on January 20. Case 2 presented with mild symptoms on January 20 following frequent unprotected bed-side care of the Index case between January 14 to 19, and exposed to live bird market on January 17. Case 3 became unwell on January 23 after providing bedside care to the Index case on January 17 to 18, and following the contact with Case 2 during January 21 to 22 at the funeral of the Index case. The two secondary cases were discharged on February 2 and 5 separately after early treatment with antiviral medication. Four virus strains were isolated and genome analyses showed 99.6 ~100% genetic homology, with two amino mutations (V192I in NS and V280A in NP). 42% (11/26) of environmental samples collected in January were H7N9 positive. Twenty-five close contacts remained well and were negative for H7N9 infection by RT-PCR and HI assay.
conclusionsIn the present study, the Index case was infected from a live bird market while the two secondary cases were infected by the Index case during unprotected exposure. This family cluster is, therefore, compatible with non-sustained person-to-person transmission of avian influenza A/H7N9.
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