Table 1.
Description of the 39 European PRRSV isolates used in the present study.
| Isolate | Titre log (TCID50/mL)* | Year | Tissue | Isolate | Titre log (TCID50/mL)* | Year | Tissue |
|---|---|---|---|---|---|---|---|
| 2652 | 4.4 | 2005 | Serum | 2996 | 5.4 | 2005 | Lung |
| 2654 | 4.9 | 2005 | Serum | 2998 | 4.8 | 2003 | Lung |
| 2655 | 4.9 | 2005 | Serum | 3003 | 5.0 | 1994 | Serum |
| 2658 | 4.6 | 2005 | Serum | 3004 | 4.8 | 1994 | Serum |
| 2744 | 6.2 | 1991 | Serum | 3005 | 5.1 | 1994 | Serum |
| 2751 | 5.4 | 2005 | Serum | 3009 | 4.9 | 2005 | Lung |
| 2788 | 6.0 | 2006 | Serum | 3012 | 5.5 | 1997 | Serum |
| 2797 | 5.2 | 1991 | Serum | 3013 | 4.9 | 2004 | Lung |
| 2804 | 5.7 | 1992 | Serum | 3016 | 6.4 | 1991 | Serum |
| 2805 | 6.8 | 1992 | Serum | 3249 | 4.8 | 1991 | Serum |
| 2810 | 4.6 | 1992 | Serum | 3256 | 4.8 | 2005 | Lung |
| 2812 | 4.7 | 1992 | Serum | 3262 | 5.1 | 2005 | Lung |
| 2894 | 5.8 | 1991 | Serum | 3266 | 7.0 | 1991 | Serum |
| 2896 | 5.7 | 1991 | Serum | 3267 | 6.9 | 2006 | Serum |
| 2982 | 4.7 | 2005 | lung | ||||
| 2983 | 4.7 | 2005 | Serum | ||||
| 2986 | 4.8 | 2005 | Lung | ||||
| 2987 | 4.9 | 2005 | Lung | ||||
| 2988 | 4.9 | 2003 | Lung | ||||
| 2990 | 5.5 | 2005 | Lung | ||||
| 2991 | 5.1 | 2006 | Lung | ||||
| 2992 | 4.9 | 2006 | Lung | ||||
| 2993 | 4.9 | 2006 | Lung | ||||
| 2994 | 5.0 | 2006 | Lung | ||||
| 2995 | 5.1 | 2004 | Lung |
*Maximum yield of viable virus obtained in cell culture supernatants (72 h) for a given strain after inoculation of 1 × 107 porcine alveolar macrophages (10 mL cell culture medium) with every strain at any multiplicity of infection.