Spread and Evolution of H9N2 Avian Influenza Viruses
Author Information
Author(s): Zhou Yong, Li Yudong, Chen Hongzhuang, Shu Sicheng, Li Zhixin, Sun Honglei, Sun Yipeng, Liu Jinhua, Lu Lu, Pu Juan
Primary Institution: National Key Laboratory of Veterinary Public Health and Safety, China Agricultural University
Hypothesis
How has the BJ/94 lineage H9N2 avian influenza virus evolved and spread across species and regions?
Conclusion
The BJ/94 lineage H9N2 virus has expanded its geographical distribution and interspecies transmission, posing increased public health risks.
Supporting Evidence
- The G57 genotype of H9N2 has rapidly adapted to chickens and spread across China and beyond.
- Since 2013, G57 has been detected more frequently in wild birds, mammals, and humans.
- Vietnam has emerged as a new hotspot for the international spread of G57.
Takeaway
A type of bird flu called H9N2 has been spreading a lot and changing over time, which could make it more dangerous for both birds and people.
Methodology
The study analyzed H9N2 virus sequences from GISAID and NCBI, performed phylogenetic analyses, and assessed selection pressures and reassortment patterns.
Potential Biases
High-prevalence areas may be over-represented in sequence datasets, reflecting local transmissions.
Limitations
Potential bias from inconsistent sequencing efforts across different times and regions.
Participant Demographics
The study focused on avian influenza viruses from poultry and wild birds, with implications for human health.
Statistical Information
P-Value
p<0.0001
Statistical Significance
p<0.0001
Digital Object Identifier (DOI)
Want to read the original?
Access the complete publication on the publisher's website