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Table 3 Comparison of RT-qPCR assays

From: Detection of highly pathogenic zoonotic influenza virus H5N6 by reverse-transcriptase quantitative polymerase chain reaction

Sample description

RT-qPCR assays

 

AI type A (generic)

H5 duplex (generic H5)

H5 2.3.4.4-BHQ1

H5 2.3.4.4-MGB

AI N6

A/shearwater/Australia/75(H5N3)

22.9

25.3

U

U

U

A/Chicken/Myanmar/295/2010(H5N1); clade 2.3.2.1

20.8

22.8

U

U

U

A/Duck/VN/2064/13(H5N1); clade 2.3.2.1

19.8

20.8

U

U

U

A/Swallow/Vietnam/4696/2013(H5N1); clade 2.3.2.1

17.7

19.3

U

U

U

A/Ch/LaoPDR/LK001/2010(H5N1); clade 2.3.4.1

17.6

21.3

U

U

U

A/Ch/LaoPDR/LK002/2010(H5N1); clade 2.3.4.1

17.7

21.6

U

U

U

A/Duck/VN/4804/13(H5N1); clade 1.1

22.7

24.2

28.8

U

44.8/U

A/Chicken/Indonesia/Subang/2007(H5N1); clade 2.1.3

23.2

24.6

30.2

U

U

A/Chicken/Laos/Xaythani/26/2006(H5N1); clade 2.3.4

24.0

27.4

31.7

U

U

A/Avian/Myanmar/182/2010(H5N1); clade 2.3.4.2

20.7

23.5

26.8

U

42.3/U

A/duck/Lao/XBY004/2014(H5N6); clade 2.3.4.4

20.8

24.9

22.7

18.2

22.1

A/MALLARD/GURJEV/244/82(H14N6)

21.5

U

U

U

23.0

A/silver gull/Tasmania/349/2006(H13N6)

27.1

U

U

U

U

A/gull/Maryland/704/1977(H13N6)

15.7

U

U

U

40.2/U

No template (negative control)

U

U

U

U

U

  1. AI reference assays and candidate clade-specific and N6 assays were compared using selected AI strains.
  2. U = Undetected. Results are displayed as averaged CT values of two replicates. Assay results considered positive are indicated by CT values in bold. Strain A/duck/Lao/XBY004/2014(H5N6) representative of proposed clade 2.3.4.4 is indicated in bold.