Table 4 Diagnoses recorded in OSVS records that indicated antimicrobial use, when antimicrobials were used in treatment (July 1, 2007 – June 30, 2009)

Streptococcus suis

94

13.91

PRRS

93

13.76

Scours^a

49

7.25

Escherichia coli

45

6.66

Circovirus

43

6.36

Arthritis

40

5.92

Ileitis

31

4.59

Influenza

30

4.44

Erysipelas

29

4.29

Glassers

28

4.14

Greasy pig^a

19

2.81

Actinobacillus pleuropneumonia

19

2.81

Salmonella

18

2.66

Lameness

17

2.51

Mycoplasma

17

2.51

Coccidiosis

10

1.48