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Table 1 Number of Neospora caninum seropositive female animals above 4 months of age in a Swedish dairy herd. The animals were classified into age groups according to year of birth.

From: A Long-Term Study of Neospora caninum Infection in a Swedish Dairy Herd

Age Year
years 1994* 1995* 1996* 1997* 1998* 1999*
≥4 5/15 (33%) 4/10 (40%) 15/23 (65%) 19/23 (83%) 18/25 (72%) 18/20 (90%)
3 6/12 (50%) 4/8 (50%) 13/13 (100%) 9/16 (56%) 10/14 (71%) 20/23 (87%)
2 11/17 (65%) 18/18 (100%) 14/19 (74%) 13/16 (81%) 20/26 (77%) 14/16 (88%)
1 18/18 (100%) 11/16 (69%) 12/18 (67%) 20/26 (77%) 15/16 (94%) 16/19 (84%)
<1 4/8 (50%) 0/0 0/0 1/2 (50%) 1/2 (50%) 5/6 (83%)
Total 44/70 (63%) 37/52 (71%) 54/73 (74%) 62/83 (75%) 64/83 (77%) 73/84 (87%)
  1. * number of seropositive animals/total number of animals (percentage).