Host genetics determine susceptibility to avian influenza infection and transmission dynamics.

Abstract:

:Host-genetic control of influenza virus infection has been the object of little attention. In this study we determined that two inbred lines of chicken differing in their genetic background , Lines 0 and C-B12, were respectively relatively resistant and susceptible to infection with the low pathogenicity influenza virus A/Turkey/England/647/77 as defined by substantial differences in viral shedding trajectories. Resistant birds, although infected, were unable to transmit virus to contact birds, as ultimately only the presence of a sustained cloacal shedding (and not oropharyngeal shedding) was critical for transmission. Restriction of within-bird transmission of virus occurred in the resistant line, with intra-nares or cloacal infection resulting in only local shedding and failing to transmit fully through the gastro-intestinal-pulmonary tract. Resistance to infection was independent of adaptive immune responses, including the expansion of specific IFNγ secreting cells or production of influenza-specific antibody. Genetic resistance to a novel H9N2 virus was less robust, though significant differences between host genotypes were still clearly evident. The existence of host-genetic determination of the outcome of influenza infection offers tools for the further dissection of this regulation and also for understanding the mechanisms of influenza transmission within and between birds.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Ruiz-Hernandez R,Mwangi W,Peroval M,Sadeyen JR,Ascough S,Balkissoon D,Staines K,Boyd A,McCauley J,Smith A,Butter C

doi

10.1038/srep26787

subject

Has Abstract

pub_date

2016-06-09 00:00:00

pages

26787

issn

2045-2322

pii

srep26787

journal_volume

6

pub_type

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