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Contact transmission of influenza virus between ferrets imposes a looser bottleneck than respiratory droplet transmission allowing propagation of antiviral resistance
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Contact transmission of influenza virus between ferrets imposes a looser bottleneck than respiratory droplet transmission allowing propagation of antiviral resistance
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Journal Article
Contact transmission of influenza virus between ferrets imposes a looser bottleneck than respiratory droplet transmission allowing propagation of antiviral resistance
2016
Overview
Influenza viruses cause annual seasonal epidemics and occasional pandemics. It is important to elucidate the stringency of bottlenecks during transmission to shed light on mechanisms that underlie the evolution and propagation of antigenic drift, host range switching or drug resistance. The virus spreads between people by different routes, including through the air in droplets and aerosols, and by direct contact. By housing ferrets under different conditions, it is possible to mimic various routes of transmission. Here, we inoculated donor animals with a mixture of two viruses whose genomes differed by one or two reverse engineered synonymous mutations, and measured the transmission of the mixture to exposed sentinel animals. Transmission through the air imposed a tight bottleneck since most recipient animals became infected by only one virus. In contrast, a direct contact transmission chain propagated a mixture of viruses suggesting the dose transferred by this route was higher. From animals with a mixed infection of viruses that were resistant and sensitive to the antiviral drug oseltamivir, resistance was propagated through contact transmission but not by air. These data imply that transmission events with a looser bottleneck can propagate minority variants and may be an important route for influenza evolution.
Publisher
Nature Publishing Group UK,Nature Publishing Group
Subject
/ 38/91
/ Aerosols
/ Animals
/ Antiviral Agents - pharmacology
/ Disease Transmission, Infectious
/ Dogs
/ Female
/ Ferrets
/ Humanities and Social Sciences
/ Humans
/ Influenza A Virus, H1N1 Subtype - drug effects
/ Influenza A Virus, H1N1 Subtype - genetics
/ Influenza A Virus, H1N1 Subtype - physiology
/ Influenza, Human - transmission
/ Madin Darby Canine Kidney Cells
/ Mutation
/ Orthomyxoviridae Infections - prevention & control
/ Orthomyxoviridae Infections - transmission
/ Orthomyxoviridae Infections - virology
/ Respiratory System - virology
/ Science
/ Viruses
