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. 2009 Jan 28;88(4):298–307. doi: 10.1016/j.prevetmed.2008.12.005

Table 5.

Incidence rates (IR) (events/100 cattle-years) or incidence proportions (IP) (events/100 cows at risk) reported by farmers and in the dairy-disease database (DDD). The study was a baseline recording of disease events in Swedish dairy herds during January (n = 177), April (n = 157), July (n = 153) and October (n = 152) 2004. Rates are given for all disease events and for veterinary-treated events only (herd outbreaks excluded). By diagnosis, cattle-years at risk ranged between 2929 and 2963 for cows and between 3857 and 3873 for young stock (for diagnoses where IRs were estimated). By diagnosis, the number of animals at risk ranged between 3518 and 9181 (for diagnoses where IPs were estimated).

All disease events
 Only veterinary-treated disease events
Farmers’ data
 DDD
 Farmers’ data
 DDD
n IP or IR 95% CIc n IP or IR 95% CIc n IP or IR 95% CIc n IP or IR 95% CIc
Cows; IP
 Calving problems 49 1.4 1.0 2.0 15 0.4 0.3 0.7 26 0.7 0.5 1.1 15 0.4 0.3 0.7
 Peripartum disorders 39 0.4 0.3 0.6 18 0.2 0.1 0.3 33 0.4 0.3 0.5 20 0.2 0.1 0.4
 Puerperal paresis 137 3.5 2.9 4.3 106 2.7 2.2 3.4 123 3.2 2.6 3.9 106 2.7 2.2 3.4
 Retained placenta 93 2.4 1.9 3.0 48 1.2 0.9 1.8 71 1.8 1.4 2.4 47 1.2 0.9 1.7



Cows; IR
 Abomasal displacement 26 0.9 0.6 1.3 25 0.8 0.6 1.2 25 0.8 0.6 1.3 25 0.8 0.6 1.2
 Acetonemia/inappetence 77 2.6 2.0 3.5 45 1.5 1.0 2.0 41 1.4 1.0 2.0 41 1.4 0.9 2.0
 Clinical mastitis 843 28.8 25.5 32.7 567 19.3 16.6 22.5 662 22.6 19.3 26.4 558 19.0 16.3 22.2
 Cougha 14 0.5 0.2 1.0 3 0.1 0.0 0.4 8 0.3 0.1 0.6 3 0.1 0.0 0.4
 Coughb 278 9.4 4.2 21.1 5 0.2 0.1 0.5 – – – – – – – –
 Gastro-intestinal disordersa 29 1.0 0.7 1.5 2 0.1 0.0 0.3 13 0.4 0.2 0.8 2 0.1 0.0 0.3
 Gastro-intestinal disordersb 225 7.6 3.4 17.2 2 0.1 0.0 0.3 – – – – – – – –
 Lameness (hoof) 207 7.0 4.8 10.2 90 3.0 2.0 4.5 119 4.0 2.8 5.7 90 3.0 2.0 4.5
 Lameness (limb) 147 5.0 3.8 6.5 3 0.1 0.0 0.3 60 2.0 1.3 3.1 0 – – –
 Laminitis 10 0.3 0.2 0.7 12 0.4 0.2 0.9 10 0.3 0.2 0.7 12 0.4 0.2 0.9
 Other disorders 100 3.4 2.7 4.2 138 4.7 3.5 6.3 70 2.4 1.8 3.1 136 4.6 3.4 6.2
 Paresis, not puerperal 44 1.5 1.1 2.0 23 0.8 0.5 1.2 37 1.2 0.9 1.8 23 0.8 0.5 1.2
 Ringworm/lice 120 4.1 0.9 19 0 0.0 – – 2 0.1 0.0 0.3 0 0.0 – –
 Teat tramp 133 4.5 3.5 5.7 39 1.3 0.9 1.9 61 2.1 1.6 2.8 33 1.1 0.7 1.7
 Traumatic reticuloperitonitis 13 0.4 0.3 0.8 7 0.2 0.1 0.5 13 0.4 0.3 0.8 7 0.2 0.1 0.4
 Udder disorders 40 1.4 1.0 2.0 5 0.2 0.1 0.4 8 0.3 0.1 0.5 5 0.2 0.1 0.4



Young stock; IR
 Cougha 70 1.8 0.9 3.7 5 0.1 0.1 0.3 27 0.7 0.4 1.2 5 0.1 0.1 0.3
 Coughb 422 10.9 5.5 21.7 5 0.1 0.0 0.3 – – – – – – – –
 Gastro-intestinal disordersa 168 4.4 3.2 6.1 2 0.1 0.0 0.2 31 0.8 0.4 1.8 2 0.1 0.0 0.2
 Gastro-intestinal disordersb 324 8.4 4.6 15.4 2 0.1 0.0 0.2 – – – – – – – –
 Lameness (hoof) 24 0.6 0.4 1.1 16 0.4 0.2 0.8 18 0.5 0.3 0.9 16 0.4 0.2 0.8
 Lameness (limb) 15 0.4 0.2 0.6 3 0.1 0.0 0.2 9 0.2 0.1 0.5 0 0.0 – –
 Other disorders 62 1.6 1.1 2.3 19 0.5 0.3 0.8 29 0.7 0.5 1.2 19 0.5 0.3 0.8
 Ringworm/lice 204 5.3 1.4 19.8 0 0.0 – – 2 0.1 0.0 0.4 0 0.0 – –
a

IR estimated excluding herd outbreaks.

b

IR estimated for all events including herd outbreaks.

c

In case of non-overlapping CIs (indicating significant difference), the upper CI is bold.