Table 2.
Single radial immunodiffusion (SRID) zone size of a dilution series of four H5N1 reference antigens in the presence of a constant concentration of three potency antisera
| Potency antiserum | SRID zone size (mm) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1:2 | 1:3 | 1:4 | 1:5 | 1:6 | 1:7 | 1:8 | 1:9 | 1:10 | ||
| Dilutions of A/Vietnam Antigen ‐152 μg/ml | ||||||||||
| S‐APS Viet 10 μl/ml | 10·1 | 9·0 | 8·4 | 7·9 | 7·7 | 7·3 | 7·2 | 6·9 | 6·7 | 6·7 |
| S‐7854 Ind 10 μl/ml | 12·2 | 10·2 | 9·2 | 8·6 | 8·2 | 7·9 | 7·6 | 7·3 | 7·2 | 6·8 |
| S‐112 bhg 10 μl/ml | 15·2 | 13·4 | 12·0 | 11·3 | 10·4 | 9·7 | 9·3 | 8·9 | 8·6 | 7·9 |
| Dilutions of A/Indonesia Antigen – 86 μg/ml | ||||||||||
| S‐APS Viet 10 μl/ml | 8·4 | 7·4 | 7·1 | 6·6 | 6·5 | 6·5 | 6·1 | 6·1 | 5·9 | 5·8 |
| S‐7854 Ind 10 μl/ml | 8·4 | 7·2 | 6·9 | 6·8 | 6·7 | 6·6 | 6·5 | 6·4 | 6·4 | 6·4 |
| S‐112 bhg 10 μl/ml | 12·4 | 11·1 | 10·4 | 9·5 | 9·3 | 8·4 | 8·2 | 7·8 | 7·7 | 7·2 |
| Dilutions of A/bhg Antigen – 69 μg/ml | ||||||||||
| S‐APS Viet 10 μl/ml | 8·1 | 7·3 | 6·9 | 6·5 | 6·3 | 6·0 | 5·8 | 5·6 | 5·8 | 5·7 |
| S‐7854 Ind 10 μl/ml | 8·0 | 7 | 6·6 | 6·4 | 6·3 | 6·2 | 6·2 | 6·2 | 6·1 | 6·1 |
| S‐112 bhg 10 μl/ml | 9·7 | 7·9 | 7·2 | 6·9 | 6·6 | 6·4 | 6·2 | 6·2 | 6·2 | 6·1 |
| Dilutions of A/Anhui Antigen – 99 μg/ml | ||||||||||
| S‐APS Viet 10 μl/ml | 9 | 8·4 | 7·7 | 7·7 | 7·2 | 6·9 | 6·9 | 6·8 | 6·7 | |
| S‐7854 Ind 10 μl/ml | 9·8 | 8·2 | 7·7 | 7·1 | 7 | 6·7 | 6·6 | 6·5 | 6·5 | 6·4 |
| S‐112 bhg 10 μl/ml | 14·4 | 12·7 | 11·3 | 10·8 | 9·8 | 9·3 | 8·7 | 8·3 | 8·1 | 7·4 |