From: Pathogenic variability among Pasteurella multocida type A isolates from Brazilian pig farms
Variables | Groups† | p* | ||||||||
---|---|---|---|---|---|---|---|---|---|---|
G0 | G1 | G2 | G3 | G4 | G5 | G6 | G7 | G8 | ||
Clinical signs | ||||||||||
Hyperthermia | 0.00b | 100.0a | 62.50ab | 100.0a | 75.00ab | 75.00ab | 12.50b | 100.0a | 25.00b | < 0.0001 |
Dyspnea | 0.00c | 100.0a | 37.50b | 87.50ab | 0.00bc | 25.00bc | 0.00bc | 100.0a | 0.00bc | < 0.0001 |
Cough | 16.67b | 50.00ab | 37.50ab | 12.50b | 0.00b | 37.50ab | 0.00b | 87.50a | 0.00b | 0.0002 |
Macroscopic lesions | ||||||||||
Cranioventral lung consolidation** | 0.00c | 62.50ab | 37,5,00ab | 87.50a | 12.50b | 0.00bc | 0.00bc | 75.00a | 0.00bc | < 0.0001 |
Cranioventral lung consolidation (%)*** | 0.00 ± 0.00b | 3.58 ± 1.51ab | 2.53 ± 1.43ab | 6.26 ± 2.38a | 1.30 ± 1.30b | 0.00 ± 0.00b | 0.00 ± 0.00b | 5.01 ± 1.58a | 0.000 ± 0.00b | 0.0004 |
Necrotic nodules | 0.00c | 62.50a | 37.50ab | 75.00a | 0.00bc | 0.00bc | 0.00bc | 37.50ab | 0.00bc | < 0.0001 |
Diffuse fibrinous pleuritis | 0.00c | 50.00ab | 0.00bc | 75.00a | 0.00bc | 25.00abc | 0.00bc | 50.00ab | 0.00bc | < 0.0001 |
Mild focal fibrinous pleuritis | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 12.50 | 0.00 | 12.50 | 0.00 | 0.7074 |
Diffuse fibrinous pericarditis | 0.00c | 25.00abc | 25.00abc | 62.50a | 0.00bc | 25.00abc | 0.00bc | 37.50ab | 0.00bc | 0.0029 |
Fibrinous peritonitis | 0.00d | 62.50a | 12.50bcd | 37.50ab | 25.00abc | 50.00ab | 0.00cd | 50.00ab | 0.00cd | < 0.0001 |
Microscopic lesions | ||||||||||
Fibrinonecrotic suppurative/fibrinonecro-haemorrhagic pleuropneumonia | 0.00c | 87.50a | 50.00ab | 87.50a | 0.00bc | 0.00bc | 0.00bc | 75.00a | 0.00bc | < 0.0001 |
Fibrinopurulent pleuropneumonia | 0.00 | 0.00 | 0.00 | 0.00 | 12.50 | 0.00 | 0.00 | 12.50 | 0.00 | 0.7074 |
Suppurative lymphadenitis | 0.00c | 12.50bc | 37.50ab | 75.00a | 12.50bc | 12.50bc | 0.00bc | 37.50ab | 0.00bc | 0.0005 |