Table 1.
Flavivirus seroprevalence based on hemagglutination inhibition assay (n = 620).
| Samples tested n (%) | HIA positive*n (%) | ||||
|---|---|---|---|---|---|
| Total | 620 | 180 (29.0) | |||
| Province | |||||
| Kandal | 296 (47.7) | 58 (19.6) | |||
| Kratie | 283 (45.6) | 98 (34.6) | |||
| Mondulkiri | 41 (6.6) | 24 (58.5) | |||
| Species | |||||
| Chicken | 417 (67.3) | 99 (23.7) | |||
| Duck | 203 (32.7) | 81 (39.9) | |||
|
Age mean (95% CI) |
7.93 (7.19–8.67) |
Age groups |
Samples tested n (%) |
HIA positive* n (%) |
|
| 1 month | 11 (1.8) | 2 (18.2) | 1–3 month | 195 (31.5) | 33 (16.9) |
| 2 months | 105 (16.9) | 20 (19.0) | |||
| 3 months | 79 (12.7) | 11 (13.9) | |||
| 4 months | 96 (15.5) | 23 (24.0) | 4–6 months | 144 (23.2) | 29 (20.1) |
| 5 months | 18 (2.9) | 2 (11.1) | |||
| 6 months | 30 (4.8) | 4 (13.3) | |||
| 7 months | 10 (1.6) | 2 (20.0) | 7–9 months | 28 (4.5) | 6 (21.4) |
| 8 months | 17 (2.7) | 4 (23.5) | |||
| 9 months | 1 (0.2) | 0 - | |||
| 10 months | 8 (1.3) | 4 (50.0) | ≥10 months# | 147 (23.7) | 75 (51.0) |
| 11 months | 1 (0.2) | 0 - | |||
| 12 months | 32 (5.2) | 18 (56.3) | |||
| 18 months | 9 (1.5) | 4 (44.4) | |||
| 24 months | 57 (9.2) | 35 (61.4) | |||
| 27 months | 2 (0.3) | 0- | |||
| 30 months | 10 (1.6) | 0 - | |||
| 36 months | 6 (1.0) | 2 (33.3) | |||
| Unknown # | 128 (20.6) | 49 (38.3) | Unknown | 106 (17.1) | 37 (34.9) |
*
HIA titer ≥ 80 in at least one of the tested flaviviruses (JEV, DENV-2, DENV-3, ZIKV).
#
Including 22 birds with an estimated age of <12 months.
HIA Hemagglutination inhibition assay; JEV Japanese encephalitis virus; WNV West Nile virus, DENV dengue virus, ZIKV Zika virus.