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Table 1 Seropositivity for Toxoplasma gondii in sheep according to animal age.

From: Increased Toxoplasma gondii positivity relative to age in 125 Scottish sheep flocks; evidence of frequent acquired infection

Age of Sheep Numbers of Animals Percentage of Animals
  Positive Negative Borderline Positive* Negative* Borderline
1 year 76 128 12 37.3% 62.7% 5.6%
2 years 247 289 58 46.1% 53.9% 9.8%
3 years 351 307 87 53.3% 46.7% 11.7%
4 years 340 257 64 57.0% 43.0% 9.7%
5 years 292 151 45 65.9% 34.1% 9.2%
6 years 209 101 28 67.4% 32.6% 8.3%
> 6 years 104 37 15 73.8% 26.2% 9.6%
Total 1619 1270 309 56.0% 44.0% 9.7%
  1. * Borderline results were excluded for calculation of seroprevalence in age cohorts