Table 1.
Crossreactivity between H9N2 influenza viruses in hemagglutination inhibition tests
| H9N2 viruses* | Antibody titers with antisera to influenza viruses
|
||||||
|---|---|---|---|---|---|---|---|
| Ty/WI/66 [R] | Ty/MN/38391/95 [C] | Sb/DE/9/96 [C] | Qa/HK/G1/97 [C] | Ck/HK/G9/97 [C] | Dk/HK/Y280/97 [C] | Ab/HK/M603/98 [C] | |
| Ty/CA/189/66 | 1280 | 1280 | 1280 | 20 | 40 | 20 | < |
| Ty/WI/66 | 320 | 640 | 640 | 20 | 20 | < | < |
| Gs/MN/5733/80 | 320 | 1280 | ≥2560 | 40 | 80 | 160 | < |
| Qa/AR/29209/93 | 320 | 640 | 640 | 20 | 40 | 20 | < |
| Ty/MN/38391/95 | 320 | 320 | 1280 | < | 40 | 20 | < |
| Sb/DE/9/96 | 160 | 640 | 640 | < | 20 | 20 | < |
| Ck/Kor/006/96 | 160 | 1280 | 320 | 20 | 40 | 20 | < |
| Ck/Kor/323/96 | 80 | 640 | 160 | < | 40 | 20 | < |
| Ck/Bei/1/94 | 80 | 320 | 80 | 40 | 320 | 320 | < |
| Qa/HK/G1/97 | 80 | 1280 | 80 | 1280 | 160 | 80 | < |
| Ck/HK/G9/97 | 640 | ≥2560 | 1280 | 320 | ≥2560 | >2560 | < |
| Ck/HK/G23/97 | 320 | ≥2560 | 640 | 320 | 2560 | ≥2560 | < |
| Pg/HK/Y233/97 | 640 | ≥2560 | 1280 | 1280 | ≥2560 | >2560 | < |
| Dk/HK/Y280/97 | 160 | 1280 | 80 | 80 | 1280 | 640 | < |
| Dk/HK/Y439/97 | 160 | 640 | 320 | 20 | 40 | 20 | < |
| Ab/HK/M603/98(H11N1) | < | < | < | < | < | < | 320 |
*
Virus abbreviation: animals: turkey, Ty; goose, Gs; quail, Qa; chicken, Ck; shorebird, SB; pigeon, Pg, aquatic bird, Ab. Place: Arkansas, AR; California, CA; Delaware, DE; Wisconsin, WI; Minnesota, MN; Beijing, Bei; Korea, Kor; Hong Kong, HK. [R] = hyperimmune rabbit antiserum, [C] = postinfection chicken antisera.