Table 2.
Subtypes of swIAV isolated from pigs in Belgium and the Netherlands in the period 2014–2019.
| Isolate subtype | Isolate lineage | Number of isolates per year | ||||||
|---|---|---|---|---|---|---|---|---|
| 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | Total | ||
| H1N1 | H1avN1av | 9 | 3 | 1 | 4 | 9 | 14 | 40 |
| H1pdmN1av | 1 | 1 | ||||||
| H1pdmN1pdm | 1 | 1 | ||||||
| H1N2 | H1huN2 | 5 | 1 | 1 | 8 | 9 | 24 | |
| H1avN2 | 1 | 1 | 2 | |||||
| H1pdmN2 | 1 | 2 | 3 | |||||
| H3N2 | H3huN2 | 8 | 2 | 4 | 4 | 18 | ||
| Number of positive samples | 23 | 3 | 2 | 8 | 22 | 31 | 89 | |
| Total number of samples | 51 | 11 | 3 | 24 | 58 | 53 | 200 | |
The three subtypes of swIAV that circulate in swine are shown in first column. Within each subtype, the lineages/origin (second column) of the HA and NA are indicated: av—European avian-like; hu—European human-like; pdm—2009 pandemic.