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Table 3 Prevalence of Chlamydia abortus infection in yaks by age in Tibet, China

From: Seroprevalence of Chlamydia abortus infection in yak (Bos grunniens) in Tibet, China

  Age group Number Tested Number Positive Prevalence % (95 % CI) p
  1 < age ≤ 2 107 17 15.9 (8.8–22.9) 0.412
  2 < age ≤ 3 129 18 14.0 (7.9–20.0)  
  3 < age ≤ 4 174 18 10.3 (5.8–14.9)  
  4 < age ≤ 5 143 17 11.9 (6.5–17.3)  
  5 < age ≤ 6 year 181 16 8.8 (4.7–13.0)  
  6 < age ≤ 7 133 13 9.8 (4.7–14.9)  
  age > 7 71 5 7.0 (0.9–13.1)  
  Total 938 104 11.1 (9.1–13.1)