Table 4. The percentage of porcine reproductive and respiratory syndrome (PRRS) virus detection in PRRS virus non-vaccinated herds (n=66) and in PRRS-modified lived virus vaccinated herds (n=23).
| Herds | n | PRRS virus detection | PRRS virus detection by genotypes | ||
|---|---|---|---|---|---|
| Genotype 1 | Genotype 2 | Mixed | |||
| Non-vaccinated herds | 66 | 45/66 (68.2%) | 12/66 (18.2%) | 20/66 (30.3%) | 13/66 (19.7%) |
| Herd A | 43 | 32/43 (74.4%) | 4/43 (9.3%) | 17/43 (39.5%) | 11/43 (25.6%) |
| Herd B | 12 | 6/12 (50.0%) | 3/12 (25.0%) | 2/12 (16.7%) | 1/12 (8.3%) |
| Herd C | 5 | 5/5 (100.0%) | 4/5 (80.0%) | 0/5 (0.0%) | 1/5 (20.0%) |
| Herd D | 3 | 2/3 (66.7%) | 1/3 (33.3%) | 1/3 (33.3%) | 0/3 (0.0%) |
| Herd E | 2 | 0/2 (0.0%) | 0/2 (0.0%) | 0/2 (0.0%) | 0/2 (0.0%) |
| Herd F | 1 | 0/1 (0.0%) | 0/1 (0.0%) | 0/1 (0.0%) | 0/1 (0.0%) |
| Vaccinated herds | 23 | 15/23 (65.2%) | 5/23 (21.7%) | 3/23 (13.0%) | 7/23 (30.4%) |
| Herd G | 9 | 9/9 (100.0%) | 4/9 (44.4%) | 0/9 (0.0%) | 5/9 (55.6%) |
| Herd H | 7 | 4/7 (57.1%) | 1/7 (14.3%) | 3/7 (42.9%) | 0/7 (0.0%) |
| Herd I | 5 | 0/5 (0.0%) | 0/5 (0.0%) | 0/5 (0.0%) | 0/5 (0.0%) |
| Herd J | 2 | 2/2 (100.0%) | 0/2 (0.0%) | 0/2 (0.0%) | 2/2 (100.0%) |
| Total | 89 | 60/89 (67.4%) | 17/89 (19.1%) | 23/89 (25.8%) | 20/89 (22.5%) |