Figure 3From: Geographical distribution of salmonella infected pig, cattle and sheep herds in Sweden 1993-2010Density of pigs by 3 digit postal code area in Sweden in 2007. Density represents the number of animals, including adults, weaners, growers and fattening pigs, per 100 km2. © Lantmäteriet Gävle 2009, permission number I 2009/0830.Back to article page