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Table 5 Results of recombinant indirect ELISAs (iEIA) and HI or commercial NP-specific ELISA obtained with 207 porcine field sera compared on a holding base

From: Distinction of subtype-specific antibodies against European porcine influenza viruses by indirect ELISA based on recombinant hemagglutinin protein fragment-1

Holding Sample NP H1av H1N2 H1pdm H1pdmN2 H3
   cEIA IDVet iEIA HI iEIA HI iEIA HI iEIA HI iEIA HI iEIA
1 6a 5b 4 5 6 1 0 4 4 n.d. 2 0 0
2 16 15 12 14 16 3 0 13 16 n.d. 16 6 6
3 9 7 7 7 7 9 2 3 6 n.d. 4 5 3
4 7 7 7 7 7 7 7 7 7 n.d. 7 7 7
5 5 5 5 5 5 5 5 5 5 n.d. 5 5 5
6 30 30 28 30 29 1 0 28 26 n.d. 20 0 3
7 30 24 26 22 22 3 1 17 15 n.d. 14 0 0
8 30 13 18 8 14 0 0 1 3 n.d. 3 0 0
9 30 18 28 28 26 0 1 26 21 n.d. 15 0 0
10 23 3 12 9 7 3 0 0 0 n.d. 0 1 0
11 13 11 12 13 13 3 1 12 11 n.d. 6 0 0
12 10 10 10 10 6 1 1 5 3 n.d. 3 0 0
  1. a Number of sample obtained in holding.
  2. b Number of sample rated positive in the respective assay.
  3. n.d. Not determined.