Table 3 Number of salmonella positive samples from environmental weekly surveillance of the production line - before heat treatment of feed mills of A and B using largely the same feed ingredients
Year/feed producing company | Number of salmonella positive samples collected before heat treatment | Total | |||||
|---|---|---|---|---|---|---|---|
2000 | 2001 | 2002 | 2003 | 2004 | 2005 | ||
A | 32 | 17 | 14 | 10 | 7 | 3 | 83 |
B | 131) | 3 | 3 | 112) | 0 | 163) | 46 |