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Field and laboratory studies of equine influenza viruses isolated in 1979
  1. R Burrows,
  2. M Denyer,
  3. D Goodridge and
  4. F Hamilton


Experimental ponies developed signs of disease four days after the intranasal instillation of A/England 1/79 equine influenza virus and virus was recovered from the nasopharynx from the second to the ninth day. No significant antigenic difference was found between the virus and the prototype A/Miami 1/63 virus, using post infection ferret and chicken sera and post vaccination pony sera. No antigenic differences were found between four viruses isolated between January and July 1979, although some differences were found in their ability to detect haemagglutination inhibiting antibody in convalescent horse sera.

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