Circulation of influenza viruses in wild waterfowl wintering in Italy during the 1993-99 period: evidence of virus shedding and seroconversion in wild ducks.
Avian Dis
; 47(3 Suppl): 861-6, 2003.
Article
em En
| MEDLINE
| ID: mdl-14575078
ABSTRACT
The mechanisms of perpetuation of influenza A viruses in aquatic birds, their main reservoir in nature, have not yet been completely clarified. One hypothesis is that they continue to circulate in waterfowl throughout the year, even though virus isolations during the winter months are rare. We analyzed influenza virus circulation in wild ducks in Italy during six winter seasons (1993-99), using virus isolations and serological analyses. It was apparent that influenza A viruses were constantly circulating in wild birds during all the seasons considered. Moreover, seroconversion rates (obtained from ducks recaptured during the same season) suggest a frequency of influenza infections higher than expected on the basis of the virus isolation rates.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Vírus da Influenza A
/
Eliminação de Partículas Virais
/
Patos
/
Animais Selvagens
Limite:
Animals
País/Região como assunto:
Europa
Idioma:
En
Revista:
Avian Dis
Ano de publicação:
2003
Tipo de documento:
Article
País de afiliação:
Itália