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Antigenic variation among avian influenza A viruses |
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| Authors: | H G Pereira A Rinaldi L Nardelli |
| Abstract: | A total of 16 strains of influenza A virus isolated in 1965-66 from quail, ducks, turkeys, pheasants and chickens bred in poultry farms situated in Pavia and surrounding districts in northern Italy were investigated from the point of view of antigenic grouping by the complement-fixation test. |
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