1995 | 1996 | 1997 | 1998 | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Sweden | Finland | Norway | Sweden | Finland | Norway | Sweden | Finland | Norway | Sweden | Finland | Norway | |
Lymph node samples from | ||||||||||||
sows and boars | 2/1361a | 9/2725 | - | 3e/2009 | 8/2627 | - | 2/2614 | 4/3165 | - | 7/3074 | 3/3070 | - |
fattening pigs | 1/1721a | 10/2792 | 4/3207d | 1/2699 | 5/2683 | 0/2818d | 6e/3382 | 6/3209 | 0/2905d | 3/3914 | 5/3247 | 0/3104d |
Faecal herd samplesb from | ||||||||||||
nucleus and multiplyingc herds | n.a. | n.a. | 1/175 | 0/191 | 0/197 | 0/185 | 1/137 | 2/139 | 0/147 | 0/167 | 0/114 | 0/178 |
sow pool herds | n.a. | - | - | 0/23 | - | - | 0/30 | - | - | 0/35 | - | - |