Wild ducks are the reservoir for only a limited number of influenza A subtypes
Identifieur interne : 001271 ( Istex/Curation ); précédent : 001270; suivant : 001272Wild ducks are the reservoir for only a limited number of influenza A subtypes
Auteurs : G. B. Sharp [États-Unis] ; Y. Kawaoka [États-Unis] ; S. M. Wright [États-Unis] ; B. Turner [Canada] ; V. Hinshaw [États-Unis] ; R. G. Webster [États-Unis]Source :
- Epidemiology and Infection [ 0950-2688 ] ; 1993-02.
Abstract
Analysis of cloacal samples collected from 12321 wild ducks in Alberta, Canada, from 1976 to 1990 showed influenza A infections to be seasonal, with prevalences increasing as the population became increasingly more dense. Viruses with 3 haemagglutinin (H3, H4, and H6) and 3 neuraminidase subtypes (N2, N6, and N8) were found consistently to infect both adult and juvenile ducks each year, indicating that wild ducks may be a reservoir for these viruses. In contrast, viruses with 7 haemagglutinin (H2, H5, H7, H8, H9, H11, and H12) and 3 neuraminidase subtypes (N1, N3, and N4) were not found for prolonged periods during the study; when they were found, they primarily infected juveniles at moderate levels. Whilst wild ducks appear to perpetuate some influenza A viruses, they apparently do not act as a reservoir for all such viruses.
Url:
DOI: 10.1017/S0950268800050780
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<front><div type="abstract">Analysis of cloacal samples collected from 12321 wild ducks in Alberta, Canada, from 1976 to 1990 showed influenza A infections to be seasonal, with prevalences increasing as the population became increasingly more dense. Viruses with 3 haemagglutinin (H3, H4, and H6) and 3 neuraminidase subtypes (N2, N6, and N8) were found consistently to infect both adult and juvenile ducks each year, indicating that wild ducks may be a reservoir for these viruses. In contrast, viruses with 7 haemagglutinin (H2, H5, H7, H8, H9, H11, and H12) and 3 neuraminidase subtypes (N1, N3, and N4) were not found for prolonged periods during the study; when they were found, they primarily infected juveniles at moderate levels. Whilst wild ducks appear to perpetuate some influenza A viruses, they apparently do not act as a reservoir for all such viruses.</div>
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