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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