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Table 2

Seroprevalence of T. gondii infection by year in yaks on the Qinghai–Tibetan Plateau.

Provinces Counties Sampling sites 2018
2019
Average
Positive rates% (No. positive/No. samples) 95% CI Positive rates% (No. positive/No. samples) 95% CI Positive rates% (No. positive/No. samples) 95% CI
Qinghai Datong Datong Ranch 19.79(19/96)a 12.4–29.2 19.79(19/96)a 12.4–29.2
Gangcha Qingqingcao Ranch 5.41(4/74)cde 1.5–13.3 5.41(4/74)bd 1.5–13.3
Guinan Laozhaxi Ranch 3.66(3/82)de 0.8–10.3 8.56(16/187)bcd 4.1–26.2 7.06(19/269)cd 4.3–10.8
Huangzhong Slaughterhouses 17.02(8/47)ab 7.7–30.8 14.77(13/88)ab 8.1–23.9
Fengtai Ranch 12.20(5/41)abcd 4.3–12.1
Qilian Qilain Ranch 4.19(7/167)de 1.7–8.5 6.01(22/366)d 3.8–9.0
Warinai Ranch 7.54(15/199)cd 9.3–13.4
Wulan Chaidamu Ranch 0.00(0/11)abcde 0.0–28.5 8.65(18/208)bcd 5.2–13.3
Tongpu Ranch 9.14(18/197)abcd 5.0–13.5
Total 8.60(41/477) 6.2–11.5 8.65(54/624) 5.5–14.1 8.63(95/1101) 7.0–10.5
Tibet Seni Dasa Village 8.07(13/161)bcd 4.4–13.4 9.98(80/802)bc 8.0–12.3
Gaerde Ranch 9.65(11/114)abcd 4.9–16.6
Maqing Village 12.34(19/154)abc 7.6–18.6
Mufa Ranch 5.00(5/100)d 1.6–11.3
Namaqiegong Village 15.82(25/158)a 10.5–22.5
Naqu Ranch 6.09(7/115)cde 2.5–12.1
Nyainrong Gaque Ranch 11.72(15/128)abc 6.7–18.6 9.18(9/98)abcd 4.3–16.7 9.76(86/881)bc 7.9–11.9
Payu Village 2.34(4/171)e 0.6–5.9 13.24(18/136)abc 8.0–20.1
Yumaoxiong Village 9.04(17/188)bcd 5.4–14.1 14.38(23/160)ab 9.3–20.8
Total 8.20(62/756) 6.4–10.4 11.22(104/927) 9.3–13.4 9.86(166/1683) 8.5–11.4
Qinghai and Tibet 8.35(103/1233) 6.9–10.0 10.19(158/1551) 8.7–11.8 9.38(261/2784) 8.3–10.5

Note: The same lowercase letters within columns represent no significant differences between groups (p > 0.05) and different lowercase letters within columns represent significant differences between groups (p < 0.05).

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