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Table 1 Flocks of laying hens tested positive for Salmonella in indoor and outdoor production in Sweden

From: Occurrence of Salmonella spp.: a comparison between indoor and outdoor housing of broilers and laying hens

Year Housing capacitya No. test-positive flocks No. birds in test-positive flocks No. birds in test-positive flocks/total housing capacity (%)
Indoor Outdoor Indoor Outdoor Indoor Outdoor Indoor Outdoor
2007 5,649,000 351,000 1 2 Ndb Ndb Ndb Ndb
2008 5,285,639 413,305 5 0 66,900 0 1.3 0.0
2009 5,457,711 646,930 1 2 20,000 2820 0.4 0.4
2010 5,690,353 708,435 2 0 23,600 0 0.4 0.0
2011 5,922,995 769,939 0 0 0 0 0.0 0.0
2012 6,222,224 816,864 2 0 17,600 0 0.3 0.0
2013 6,312,001 875,437 7 0 69,800 0 1.1 0.0
2014 6,217,685 896,371 1 1 6600 18,000 0.1 2.0
215 6,289,060 1,153,615 2 0 39,399 0 0.6 0.0
Totalc
2008–2015
47,397,668 6,280,895 20 3 243,899 20,820 0.5 0.3
  1. aMaximum total number of laying hens at one time in laying hen houses
  2. bNot available
  3. cYear 2007 not included since data on number of birds in test-positive flocks was missing