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Table 1 Cattle farms implicated in transmission of VTEC O157 from cattle to humans in Sweden between 1996 and 2002

From: Verotoxigenic Escherichia coli O157:H7 from Swedish cattle; isolates from prevalence studies versus strains linked to human infections - A retrospective study

Farm no Year County Presence of vtxgenes Phage type Type of farm Connected cases
    vtx 1 vtx 2 vtx 2c    
1 1996 Halland   vtx 2 vtx 2c 4 Dairy farm 1 child
2 1997 Halland   vtx 2 vtx 2c 4 Dairy farm including fattening pigs 1 child
3 1997 Halland   vtx 2 vtx 2c 4 Visiting farm, petting zoo 3 children
4 1997 Sörmland   vtx 2 vtx 2c 4 Dairy farm 1 child
5 1997 Älvsborg vtx 1   vtx 2c 20/RDNC Beef-producing farm 1 adult
6 1998 Halland   vtx 2 vtx 2c 4 Beef-producing farm 1 child
7 1998 Skaraborg   vtx 2 vtx 2c 4 Dairy farm 1 child
8 1998 Älvsborg   vtx 2 vtx 2c 2 Beef-producing farm 1 child
9 1999 Bohuslän   vtx 2 vtx 2c 4 Beef-producing farm 1 child*
10 1999 Halland   vtx 2 vtx 2c 4 Beef- producing farm including piglet production 1 child
11 1999 Halland   vtx 2 vtx 2c 4 Dairy farm 1 adult
12 2001 Halland   vtx 2 vtx 2c 4 Dairy farm 1 adult
13 2001 Skåne   vtx 2 vtx 2c 4 Dairy farm 1 child
14 2001 Halland   vtx 2 vtx 2c 4 Dairy farm 1 child
15 2001 Halland   vtx 2 vtx 2c 4 Dairy farm 1 child,
1 adult
16 2002 Halland   vtx 2 vtx 2c 4 Beef-producing farm including fattening pigs 1 child
17 2002 V-götland   vtx 2 vtx 2c 4 Dairy farm 1 child
18 2002 Halland   vtx 2 vtx 2c 4 Dairy farm 1 child
  1. * Faecal sample from the child PCR-positive for vtx2 but no VTEC strain could be isolated from this patient