Table 4.
Equine influenza H3N8 and H7N7 single radial haemolysis (SRH) levels on weanling, yearling and broodmare premises
| SRH | Weanling premises n = 40 | Yearling premises n = 43 | Broodmare premises n = 41 | |||
|---|---|---|---|---|---|---|
| H3N8 | H7N7 | H3N8 | H7N7 | H3N8 | H7N7 | |
| (a) ≥1 of 5 horses tested on each premises | ||||||
| <50 mm2 | 40 (100·0%) | 39 (97·5%) | 29 (67·4%) | 29 (67·4%) | 6 (14·6%) | 7 (17·1%) |
| >50 mm2 | 8 (20·0%) | 14 (35·0%) | 38 (88·4%) | 32 (74·4%) | 41 (100·0%) | 41 (100·0%) |
| >85 mm2 | 7 (17·5%) | 7 (17·5%) | 36 (83·7%) | 31 (72·1%) | 41 (100·0%) | 41 (100·0%) |
| >150 mm2 | 3 (7·5%) | 6 (15·0%) | 24 (55·8%) | 27 (62·8%) | 38 (92·7%) | 41 (100·0%) |
| (b) all horses (5) tested on each premises | ||||||
| <50 mm2 | 31 (77·5%) | 26 (65·0%) | 5 (11·6%) | 11 (25·6%) | 0 (0·0%) | 0 (0·0%) |
| >50 mm2 | 0 (0·0%) | 0 (0·0%) | 14 (32·6%) | 14 (32·6%) | 35 (85·4%) | 34 (82·9%) |
| >85 mm2 | 0 (0·0%) | 0 (0·0%) | 10 (23·3%) | 10 (23·3%) | 23 (56·1%) | 29 (70·7%) |
| >150 mm2 | 0 (0·0%) | 0 (0·0%) | 2 (4·7%) | 3 (7·0%) | 2 (4·9%) | 8 (19·5%) |