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Table 3 Summary of the national Salmonella control program in pig herds in Sweden, Finland and Norway during 1995–1998 (number of positive Samples/total number of samples).

From: Disease Surveillance Strategies in Swine

  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 - -
  1. a Samples collected during weeks 19–52.
  2. b Sweden: 10 pooled samples per herd. Each cultivation represents 5 sows and is pooled at the laboratory; Finland: 2 pooled samples per herd. Each Cultivation represents a pooled sample from 5 pens with growing/finishing pigs; Norway: 3–20 samples per herd. Each cultivation represents 5 Growing/finishing pigs in a pen.
  3. c In Finland only nucleus herds included.
  4. d Samples from sows included.
  5. e Two positive samples from a same herd. n.a. Information not available.