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Table 3 Antigenic analysis of Rio Grande do Sul/1/12 by HI assay

From: Characterisation of the epidemic strain of H3N8 equine influenza virus responsible for outbreaks in South America in 2012

Ferret antisera

New/2/93

New/1/93

Rich/1/07

Dev/11

SA/4/03

Dor/09

RGdS/1/12

Eur

Ky

FC2

FC2

FC1

FC1

FC1

Virus strain

 Newmarket/2/93

512

64

128

64

<8

8

8

 Newmarket/1/93

16

512

512

128

64

32

64

 Richmond/1/07

32

128

512

256

128

256

128

 Devon/11

128

256

1024

512

256

256

256

 South Africa/4/03

32

16

128

128

1024

1024

1024

 Dorset/09

32

16

128

64

1024

512

512

 Rio Grande Do Sul/1/12

32

16

256

128

1024

1024

724

  1. Representative post-infection ferret sera were used against European (Eur), American (Am) and Florida clades 1 and 2 (FC1 and FC2) lineages and sub-lineages and Rio Grande do Sul/1/12
  2. Homologous titres are shown in bold italics. New/1/93 - Newmarket/1/93, New/2/93 - Newmarket/2/93, Rich/1/07 - Richmond/1/07, Dev/11 - Devon/11, SA/4/03 - South Africa/4/03, Dor/09 - Dorset/09, RGdS/1/12 - Rio Grande do Sul/1/12