Table 4 Hemagglutination inhibition (HI) titers of immune/reference sera against H5N1 viruses in HI assay with five different types of RBCs
Sr. No. | Virus strain | Antisera | RBCs | ||||
|---|---|---|---|---|---|---|---|
Turkey (0.5%) | Fowl (0.5%) | Goose (1%) | Guinea Pig (0.75%) | Horse (1%) | |||
HI titer | |||||||
1 | A/chicken/Navapur/India/7972/2006 (H5N1) | H5N1-NIV | 320 | 160 | 320 | 320 | 1280 |
H5N1-OIE | 20 | 20 | 20 | 20 | 20 | ||
H5N1-WHO | 320 | 80 | 160 | 320 | 640 | ||
2 | A/chicken/Manipur/NIV9743/2007 (H5N1) | H5N1-NIV | No titer | 20 | No titer | 160 | 640 |
H5N1-OIE | 20 | No titer | No titer | 20 | 20 | ||
H5N1-WHO | 160 | 160 | 320 | 640 | 320 | ||
3 | A/chicken/India/AS-NIV15983/ 2008/11/27 (H5N1) | H5N1-NIV | 1280 | 640 | 2560 | 1280 | 320 |
H5N1-OIE | 80 | 40 | 320 | 320 | 20 | ||
H5N1-WHO | 1280 | 640 | 2560 | 1280 | 160 | ||
4 | A/chickenIndia/WB-NIV2811/2008 (H5N1) | H5N1-NIV | 2560 | 640 | 2560 | 5120 | 5120 |
H5N1-OIE | 80 | 160 | 40 | 1280 | 640 | ||
H5N1-WHO | 1280 | 640 | 1280 | 5120 | 5120 | ||
5 | A/chicken/India/NIV33487/06-RG-2008 (H5N1) | H5N1-NIV | 320 | 320 | 640 | 480 | 480 |
H5N1-OIE | 160 | 240 | 320 | 240 | 480 | ||
Geometric mean titer | 245.1 | 165.0 | 403.2 | 434.3 | 339.0 | ||