Table 1 Crassostrea gigas samples collected during passive and active surveillance in France between 1998 and 2006: OsHV-1 detection results by PCR.
Year | Passive surveillance samples | Active surveillance samples | ||||||
|---|---|---|---|---|---|---|---|---|
Number of samples | Number of OsHV-1 negative samples | Number of OsHV-1 positive samples | OsHV-1 detection frequency (%) | Number of samples | Number of OsHV-1 negative samples | Number of OsHV-1 positive samples | OsHV-1 detection frequency (%) | |
1998 | 32 | 29 | 3 | 9 | 120 | 110 | 10 | 8 |
1999 | 19 | 15 | 4 | 21 | 102 | 98 | 4 | 4 |
2000 | 38 | 30 | 8 | 21 | 48 | 44 | 4 | 8 |
2001 | 53 | 33 | 20 | 38 | 88 | 85 | 3 | 3 |
2002 | 34 | 12 | 22 | 65 | - | - | - | - |
2003 | 23 | 12 | 11 | 48 | - | - | - | - |
2004 | 30 | 19 | 11 | 37 | - | - | - | - |
2005 | 17 | 7 | 10 | 59 | - | - | - | - |
2006 | 16 | 12 | 4 | 25 | - | - | - | - |
Total | 262 | 169 | 93 | 35 | 358 | 337 | 21 | 6 |