06.09.2014

Shi et al (2014) Emerg Inf Dis, 2014

Influenza subtype H7 viruses have been detected in poultry worldwide; associated human disease ranges from mild to severe. In February 2014, while investigating the source of a human infection with H7N9 virus in northern China, a group of researchers isolated subtypes H7N2 and H9N2 viruses from chickens on the patient's farm. Sequence analysis revealed that the H7N2 virus is a novel reassortant of H7N9 and H9N2 viruses that derived its HA, PB2, PB1, PA, NP, and M genes from the H7N9 virus that emerged in China in 2013.