Table 1 Beta-lactamase protein signatures of the blaZ genes located chromosomally or on a plasmid in S . aureus isolates in bovine mastitis in Finland and Sweden

1

4

4

2 different pulsotypes

2

1

13

2

16

8 different pulsotypes

3

10

1

14

25

Two clusters of >64% similarity, with 8 and 4 different pulsotypes

5

1

1

2

2 pulsotypes with 78% similarity

6

4

13

17

9 different pulsotypes

2/5

3

1

2

1

7

A cluster of 4 pulsotypes with 81% similarity and 1 pulsotype with 61% similarity within the cluster

Total

8

25

16

22

71