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. 1986 Jul;24(1):47–51. doi: 10.1128/jcm.24.1.47-51.1986

Evaluation of avian-human reassortant influenza A/Washington/897/80 x A/Pintail/119/79 virus in monkeys and adult volunteers.

M L Clements, M H Snyder, A J Buckler-White, E L Tierney, W T London, B R Murphy
PMCID: PMC268829  PMID: 3722365

Abstract

A reassortant influenza A virus was produced by mating an avian influenza A/Pintail/Alberta/119/79 (H4N6) virus with wild-type human influenza A/Washington/897/80 (H3N2) virus. The avian-human influenza A reassortant virus contained the genes coding for the hemagglutinin and neuraminidase surface antigens of the human influenza wild-type virus and the six other RNA segments (internal genes) of the avian influenza A virus donor. In the lower respiratory tract of squirrel monkeys, this avian-human influenza reassortant virus, like its avian influenza A parent virus, was restricted approximately 100-fold in replication compared with the wild-type human influenza A virus. Despite this restriction of replication, infection of monkeys with the avian-human influenza A reassortant virus induced resistance to wild-type human influenza A virus challenge. In comparison with the wild-type human influenza A virus, the avian-human influenza A reassortant was also fully attenuated when 10(5.5) to 10(7.5) 50% tissue culture infective doses were administered to susceptible adult volunteers. Attenuation was indicated by a more than 300-fold reduction in virus shedding and lack of reactogenicity. The reassortant virus did not spread to susceptible contacts and could not be isolated from the blood or stools of infected adults. The 50% human infectious dose was 10(6.2) 50% tissue culture infective dose, indicating that this reassortant virus is only slightly less infectious for adults than a similarly derived avian-human influenza A/Washington/80 X A/Mallard/78 reassortant virus. These findings suggest that the avian influenza A/Pintail/79 virus may be a satisfactory donor of attenuating genes for production of live, attenuated avian-human influenza A reassortant virus vaccines.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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