Characterization of swine-origin H1N1 canine influenza viruses.

Abstract:

:Host switch events of influenza A viruses (IAVs) continuously pose a zoonotic threat to humans. In 2013, swine-origin H1N1 IAVs emerged in dogs soon after they were detected in swine in the Guangxi province of China. This host switch was followed by multiple reassortment events between these H1N1 and previously circulating H3N2 canine IAVs (IAVs-C) in dogs. To evaluate the phenotype of these newly identified viruses, we characterized three swine-origin H1N1 IAVs-C and one reassortant H1N1 IAV-C. We found that H1N1 IAVs-C predominantly bound to human-type receptors, efficiently transmitted via direct contact in guinea pigs and replicated in human lung cells. Moreover, the swine-origin H1N1 IAVs-C were lethal in mice and were transmissible by respiratory droplets in guinea pigs. Importantly, sporadic human infections with these viruses have been detected, and preexisting immunity in humans might not be sufficient to prevent infections with these new viruses. Our results show the potential of H1N1 IAVs-C to infect and transmit in humans, suggesting that these viruses should be closely monitored in the future.

journal_name

Emerg Microbes Infect

authors

Wang G,Dos Anjos Borges LG,Stadlbauer D,Ramos I,Bermúdez González MC,He J,Ding Y,Wei Z,Ouyang K,Huang W,Simon V,Fernandez-Sesma A,Krammer F,Nelson MI,Chen Y,García-Sastre A

doi

10.1080/22221751.2019.1637284

subject

Has Abstract

pub_date

2019-01-01 00:00:00

pages

1017-1026

issue

1

issn

2222-1751

journal_volume

8

pub_type

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