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Table 2 Number and percentage N caninum seropositive cattle and herds by visit types and the herd N caninum seroprevalence for the positive herds (Dataset B – 26,437 samples, 13,942 cattle, 114 herds, only cattle ≥ 2 years old for regular visits in the 4-year study period).

From: A four year longitudinal sero-epidemiology study of Neospora caninumin adult cattle from 114 cattle herds in south west England: Associations with age, herd and dam-offspring pairs

Visit identification Herds Cattle Within herd N. caninum seroprevalence for the positive herds only
  No. tested No. pos % pos No. tested No. pos % pos Median Range 25th quartile 75th quartile
1st routine visit 114 104 91.2 9963 1027 10.3 10.2 0.8 – 52.7 7.3 14.3
2nd routine visit 102 91 89.2 8979 941 10.5 9.6 0.4 – 58.8 5.8 16.8
3rd routine visit 96 87 90.6 8580 784 9.1 8.7 0.7 – 58.5 5.3 15.2
3rd routine with whole herd visit 4 4 100.0 1135 139 12.2 18.8 5.6 – 27.3 14.2 23.6
Overall 114 107 93.9 15736 2039 12.9     
  1. There were 9963, 8979 and 8580 samples respectively from the 114 herds visited once, 102 visited twice and 96 visited three times. An additional 1,135 samples were collected when four whole herd visits replaced the routine third visit (i.e. extra samples taken from young stock < 2 years).