Table 1.
Clinical, viral and bacteriological profiles and lung lesions of growing and finishing batches in the five selected farrow-to-finish pig herds (nasal, tonsillar, oro-pharyngeal swabs and blood samples of 30 growing-finishing pigs, lung examination of 30 slaughtered pigs, findings of the screening visit performed 2–3 months before the start of the longitudinal study).
| Herd | Clinical signs (cough)a | Pathogen detection by PCR in swab samples (number of positive pigs) |
Viral statusb |
Lung lesions |
Pathogen detection by PCR in lung tissuesb |
||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mhp | Pm | App | Hps | Ssuis | PRRS | SIV | Pneumonia mean score (/28) (σ)c | % pleuritis | Mhp | Pm | App | Hps | Ssuis | ||
| A | Fin. | 1 | 9 | 0 | 28 | 30 | − | − | 0.9 (2.5) | 5.1 | + | − | − | − | + |
| B | Fin. | 0 | 16 | 0 | 30 | 2 | + | − | 2.1 (3.7) | 15 | + | + | − | − | − |
| Cd | Fin. | 0 | 20 | 0 | 17 | 17 | + | − | 9.6 (4.2) | 0 | + | − | + | + | − |
| De | Far./Fin. | 3 | 26 | 0 | 30 | 18 | + | H1N1 | 10.1 (6.3) | 38.5 | + | + | − | − | − |
| E | PW/Fin. | 0 | 4 | 2 | 29 | 13 | + | H1N1, H1N2 | 6.4 (5.1) | 28.6 | + | − | − | + | − |
a
Fin.: finishing; Far.: farrowing; PW: post-weaning.
b
(+) positive; (−) negative.
d
10 growers and 10 market-aged pigs.
e
Nasal swabs.