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Table 2 Example of estimated herd characteristics presented on the herd periodical each month when somatic cell count is analysed.

From: Norwegian mastitis control programme

Health status in the herd

Herd

Country

Number of cell count recordings during the period.

8

6

Prevalence of SCC > 200,000 cells/ml (%).

24

19

New inflammation >200,000 cells/ml (%) (corrected to 6 analyses).

72 (65)

53

Duration estimated in months (corrected to 6 samples).

4.3 (4.8)

4.7

Mastitis - number of cases per cow-year.

0.05

0.27

Ketosis - number of treatments per cow-year.

0.00

0.06

Milk fever - number of treatments per calving after 1st parity.

0.13

0.08

Reproduction treatments -number of treatments per cow-year.

0.09

0.11

Standardised reproduction number (FS) (country = county).

82

64

Calves < 6 months - number of treatments per half-year.

0.10

0.02