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Table 1

Studies included in the analysis.

Study ID Sampling time Province Detection method Positive samples/total samples (Coccidia) Quality score Quality level
Central China
 Liu [50] 2012.6–2012.11 Henan Comprehensive approach 83/460 5 High
 Zhao et al. [91] 2011 Henan Comprehensive approach 134/218 3 Middle
 Shi et al. [70] 2009.7–2009.11 Henan Saturated saline water floating 570/1520 3 Middle
 Zhang et al. [97] UN Henan Saturated saline water precipitation 110/503 3 Middle
 Chen et al. [12] 2013.3–2013.5 Henan Comprehensive approach 136/466 5 High
 Zhang et al. [98] 1999.03–1999.05 Henan Saturated saline water precipitation 66/223 3 Middle
 Dong et al. [18] 2010 Henan Saturated saline water precipitation 37/73 5 High
 Zhan and Zhao [90] UN Hunan Comprehensive approach 28/32 2 Middle
Eastern China
 Ye [85] UN Zhejiang Others 56/215 3 Middle
 Liu et al. [48] 2014.6–2014.12 Shandong Saturated saline water floating 35/763 3 Middle
 Zhao et al. [94] 2005.1–12 Shanghai Saturated saline water precipitation 269/718 5 High
 Lu and Zhang [54] 1990.03–1991.10 Anhui Saturated saline water floating 233/280 4 High
 Li et al. [44] UN Anhui Saturated saline water floating 540/814 4 High
 Dong et al. [18] 2010 Shanghai Saturated saline water precipitation 88/169 5 High
Shandong
Dong et al. [19] 2010.11–2011.03 Jiangsu Others 295/626 4 High
Northern China
 Nie et al. [64] 2015–2017 Inner Mongolia Comprehensive approach 159/1009 2 Middle
 Wang et al. [79] 2007.7–2009.8 Shanxi Saturated saline water floating 136/1200 3 Middle
 Sun [74] 2003.03–2003.04 Inner Mongolia Comprehensive approach 76/265 4 High
 Xu et al. [83] 2009.01–2009.11 Beijing Saturated saline water floating 1953/3419 4 High
 Cao [8] 2015.11–2016.11 Hebei Saturated saline water floating 107/1020 4 High
 Dong et al. [18] 2010 Beijing Saturated saline water precipitation 89/183 5 High
Inner Mongolia
Northwestern China
 Wang [78] UN Qinghai Saturated saline water floating 268/460 2 Middle
 Cong [13] 2011.7–2012.8 Shaanxi Comprehensive approach 65/177 3 Middle
 Feng et al. [24] UN Shaanxi Saturated saline water floating 25/49 3 Middle
 Zhan [89] 1989.3–1989.5 Qinghai Saturated saline water floating 37/48 5 High
 Zhang et al. [96] 2016.6–2016.8 Xinjiang Saturated saline water floating 172/524 3 Middle
2017.1–2017.2
2018.1–2018.3
 Ma [55] 2012.9–2014.12 Xinjiang Saturated saline water floating 48/128 3 Middle
 Ma et al. [56] UN Xinjiang Comprehensive approach 75/211 3 Middle
 Ni et al. [63] 2014.09 Gansu Saturated saline water floating 108/234 4 High
 Li [46] UN Qinghai Saturated saline water floating 38/50 3 Middle
 E L [20] UN Qinghai Saturated saline water floating 156/500 2 Middle
 Guo et al. [26] 2014.05–2015.10 Qinghai Saturated sucrose floating 310/587 4 High
 Zhai et al [88] UN Shaanxi Saturated saline water floating 22/48 3 Middle
 Jiang [34] 2013.05–2013.06 Xinjiang Saturated sucrose floating 166/718 4 High
 Zhang et al. [95] 2016.08–2016.10 Xinjiang Saturated sucrose floating 487/1391 5 High
 Zhao [92] UN Shaanxi Saturated saline water floating 22/48 4 High
 Dong et al. [32] 2010.11–2011.01 Qinghai Others 113/324 4 High
Southern China
 Liang et al. [47] 2016.4 Guangdong Comprehensive approach 358/1440 3 Middle
 Wei et al. [81] 2013–2014 Guangxi Comprehensive approach 697/2952 4 High
 Wu et al. [82] 2014.1 Guangxi Comprehensive approach 128/109 2 Middle
 Mi et al. [58] UN Guangxi Saturated saline water floating 50/100 2 Middle
Southwestern China
 Yu et al. [87] UN Sichuan Others 10/50 2 Middle
 Zhao [14] 1990 Guizhou Saturated saline water floating 748/1202 3 Middle
 Li [43] 2017.8–2017.9 Yuannan Comprehensive approach 15/44 5 High
 Jiang and Zhu [33] 1986.9–1986.12 Sichuan Others 46/122 2 Middle
 Shen et al. [69] 2018.1.20 Sichuan Comprehensive approach 13/90 5 High
 He et al. [31] 2007.05–2008.10 Sichuan Saturated saline water floating 150/500 3 Middle
 Dong et al. [18] 2010 Sichuan Saturated saline water precipitation 3/10 5 High
 Liu [49] 2011.10–2011.11 Yunnan Saturated saline water floating 37/118 2 Middle

UN*: unclear.

ND*: No data.

Region*: Central China: Henan; Eastern China: Zhejiang, Shandong, Shanghai, Anhu, Hunan Northern China: Inner Mongolia, Shanxi, Beijing, Hebei; Northwestern China: Qinghai, Shaanxi, Xinjiang, Gansu; Southern China: Guangdong, Guangxi; Southwestern China: Sichuan, Guizhou, Yunnan.

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