TABLE 4.
Recovery of H. parasuis from piglets after challenge
| Expt group and piglet category (n)a | No. of piglets positive for H. parasuis |
|||||||
|---|---|---|---|---|---|---|---|---|
| Brain parenchyma | Liver parenchyma | Lung parenchyma | Spleen parenchyma | Pericardial swab | Peritoneal swab | Carpal joint | Hock joint | |
| Control | ||||||||
| Dead piglets (4) | 4 | 3 | 3 | 4 | 3 | 4 | 2 | 2 |
| rTbpA | ||||||||
| Dead piglets (4) | 4 | 3 | 1 | 3 | 2 | 1 | 1 | 1 |
| Surviving piglets (2) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| rTbpB | ||||||||
| Dead piglets (4) | 2 | 3 | 2 | 0 | 2 | 2 | 2 | 2 |
| Surviving piglets (1) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| NPAPTM | ||||||||
| Surviving piglets (6) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| NPAPTCp | ||||||||
| Surviving piglets (6) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| PG | ||||||||
| Surviving piglets (6) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
a
Experimental groups: control, no vaccine; rTbpA, vaccine containing rTbpA plus Montanide IMS 2215 VG PR in a 1:4 ratio; rTbpB, vaccine containing rTbpA plus Montanide IMS 2215 VG PR in a 1:4 ratio; NPAPTM, native proteins with affinity for porcine-transferrin plus Montanide IMS 2215 VG PR in a 1:4 ratio; NPAPTCp, native proteins with affinity for porcine-transferrin plus neuraminidase from Clostridium perfringens (100 mU/ml); PG, Porcilis Glässer vaccine (Intervet). n, Number of animals per group.