Table 4.
HI antibody reactivity of BEWs and Cs sera against AIV antigenic subtypes from H1 to H14 *.
| Titer against | 1st Samplig Period ** | 2nd Sampling Period ** | 3rd Sampling Period ** | |||
|---|---|---|---|---|---|---|
| AIV Strain * | BEWs | Cs | BEWs | Cs | BEWs | Cs |
| H1N1/05 | ||||||
| <1:10 | 34 | 3 | 35 | 4 | 30 | 5 |
| 1:10 | 1 | 0 | 1 | 0 | 0 | 0 |
| 1:20 | 11 | 0 | 1 | 2 | 2 | 1 |
| 1:40 | 5 | 2 | 9 | 0 | 1 | 0 |
| 1:80 | 3 | 1 | 0 | 0 | 1 | 0 |
| GMT | 9.5 | 15.9 | 7.9 | 7.9 | 6.3 | 6.3 |
| H2N3/73 | ||||||
| <1:10 | 38 | 5 | 30 | 3 | 23 | 5 |
| 1:10 | 8 | 1 | 9 | 2 | 10 | 1 |
| 1:20 | 7 | 0 | 4 | 1 | 1 | 0 |
| 1:40 | 1 | 0 | 3 | 0 | 0 | 0 |
| GMT | 6.9 | 5.6 | 7.4 | 7.9 | 6.4 | 5.6 |
| H3N8/04 | ||||||
| <1:10 | 24 | 2 | 21 | 2 | 16 | 2 |
| 1:10 | 9 | 2 | 12 | 2 | 6 | 2 |
| 1:20 | 12 | 2 | 8 | 1 | 6 | 2 |
| 1:40 | 7 | 0 | 3 | 1 | 4 | 0 |
| 1:80 | 2 | 0 | 2 | 0 | 2 | 0 |
| GMT | 11.1 | 10.0 | 9.9 | 11.2 | 10.8 | 10.0 |
| H4N6/05 | ||||||
| <1:10 | 54 | 6 | 46 | 6 | 34 | 6 |
| GMT | 5 | 5 | 5 | 5 | 5 | 5 |
| H5N9/97 | ||||||
| <1:10 | 54 | 6 | 46 | 6 | 34 | 6 |
| GMT | 5 | 5 | 5 | 5 | 5 | 5 |
| H5N3/00 | ||||||
| <1:10 | 54 | 6 | 46 | 6 | 34 | 6 |
| GMT | 5 | 5 | 5 | 5 | 5 | 5 |
| H5N1/05 | ||||||
| <1:10 | 54 | 6 | 46 | 6 | 34 | 6 |
| GMT | 5 | 5 | 5 | 5 | 5 | 5 |
| H6N5/72 | ||||||
| <1:10 | 53 | 6 | 46 | 6 | 33 | 6 |
| 1:10 | 0 | 0 | 0 | 0 | 1 | 0 |
| 1:20 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1:40 | 1 | 0 | 0 | 0 | 0 | 0 |
| GMT | 5.2 | 5 | 5 | 5 | 5.1 | 5 |
| H7N1/99 | ||||||
| <1:10 | 54 | 6 | 46 | 6 | 34 | 6 |
| GMT | 5 | 5 | 5 | 5 | 5 | 5 |
| H7N3/02 | ||||||
| <1:10 | 54 | 6 | 46 | 6 | 34 | 6 |
| GMT | 5 | 5 | 5 | 5 | 5 | 5 |
| H8N4/68 | ||||||
| <1:10 | 53 | 6 | 45 | 6 | 33 | 6 |
| 1:10 | 1 | 0 | 1 | 0 | 0 | 0 |
| 1:20 | 0 | 0 | 0 | 0 | 1 | 0 |
| GMT | 5.1 | 5 | 5.1 | 5 | 5.2 | 5 |
| H9N8/03 | ||||||
| <1:10 | 53 | 6 | 45 | 6 | 33 | 6 |
| 1:10 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1:20 | 1 | 0 | 1 | 0 | 0 | 0 |
| 1:40 | 0 | 0 | 0 | 0 | 1 | 0 |
| GMT | 5.1 | 5 | 5.2 | 5 | 5.3 | 5 |
| H10N7/05 | ||||||
| <1:10 | 54 | 6 | 46 | 6 | 34 | 6 |
| GMT | 5 | 5 | 5 | 5 | 5 | 5 |
| H11N9/05 | ||||||
| <1:10 | 54 | 6 | 46 | 6 | 33 | 6 |
| 1:10 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1:20 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1:40 | 0 | 0 | 0 | 0 | 1 | 0 |
| GMT | 5.0 | 5.0 | 5.0 | 5.0 | 5.3 | 5.0 |
| H12N5/76 | ||||||
| <1:10 | 54 | 6 | 46 | 6 | 34 | 6 |
| GMT | 5 | 5 | 5 | 5 | 5 | 5 |
| H13N6/77 | ||||||
| <1:10 | 54 | 6 | 46 | 6 | 33 | 6 |
| 1:10 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1:20 | 0 | 0 | 0 | 0 | 1 | 0 |
| GMT | 5 | 5 | 5 | 5 | 5.2 | 5 |
| H14N5/82 | ||||||
| <1:10 | 54 | 6 | 46 | 6 | 34 | 6 |
| GMT | 5 | 5 | 5 | 5 | 5 | 5 |
*, See Table S3 for AIV antigens and antisera used in the HI assay; **; See Table 3 for sampling period details; HI, hemagglutination inhibition; AIV, avian influenza virus; BEWs, bird exposed workers; Cs, controls, non exposed workers; GMT, geometric mean HI titer. In GMT calculation, an HI reciprocal titer <10 was assigned a value of 5. HI titers ≥1:10 were considered positive.