By J B McFerran; M S McNulty; Commission of the European Communities. Coordination of Agricultural Research
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Extra info for Acute virus infections of poultry : a seminar in the CEC Agricultural Research Programme, held in Brussels, June 13-14, 1985
5 pl of this vaccine there was a mortality of 4 out of 15 and 2 out of 12 respectively. The non-vaccinated birds that died had no circulating antibody at the time of challenge. Equally the majority of the vaccinated birds that became sick or that died had no antibody at that time. However, there were also some birds vaccinated either with vaccine A or B that had HI titres of 3, 4 and 5, that became sick or/and died. 5 pl of vaccine A respectively) overcame the challenge without developing symptoms.
Other workers have distinguished between P}N-1 strains by Oligonucleotide mapping (HcHillan and Hanson, 1982) and one dimensional polypeptide mapping ( Nagy and Lomniczi, 1984). P}N-2 viruses have shown wide variation in serological tests including HI tests (Alexander, 1980) frequently two widely diverging viruses both showing close homology with a third. shown asymmetrical cross relationships. Other isolates have Some variation has also been reported in the structural polypeptide profiles of P}W-2 isolates (Alexander and Collins, 1981).
Becht, H. and Orlich, M. 1974. The significance of influenza virus neuraminidase in immunity. J. gen. , 22, 35-41. 45 EXPERIMENTAL VACCINATION OF CHICKENS AGAINST AVIAN INFLUENZA SUBTIPE H5 WITH AN INACTIVATED OIL EMULSION VACCINE B. G. O. 5 ~l of two inactivated influenza vaccines prepared using the virulent A/tern/S. Africa/6l (H5N2) strain were injected subcutaneously into five week old SPF chicks. HI antibody appeared faster but also waned faster after vaccination with vaccine A, in aqueous solution, than with the oil emulsion based vaccine B.
Acute virus infections of poultry : a seminar in the CEC Agricultural Research Programme, held in Brussels, June 13-14, 1985 by J B McFerran; M S McNulty; Commission of the European Communities. Coordination of Agricultural Research