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Table 1

Prevalence of Blastocystis sp. in humans in China.

Location Method of diagnosis No. examined No. positive Prevalence (%) Diarrhea Subtypes (n) References
Guangdong In vitro culture 2 2 100% Yes [24]
Jiangxi In vitro culture 46,900 1122 2.39% Yes [59]
PCR 3 3 100% NG ST5 (2), ST3 + ST5 (1) [61]
Subtotal 469,903 1125 2.40% ST5 (2), ST3 + ST5 (1)
Anhui Smear/Iodine/Hematoxylin 703 26 3.70% Yes [57]
Chongqing Smear 2558 35 1.37% NG [54]
Guangxi Smear/Trichrome 1354 251 18.54% Yes [19]
Smear 39,671 1551 3.91% Yes [15]
Smear/Iodine 1185 145 12.24% Yes [16]
Subtotal 42,210 1947 4.61%
Yunnan PCR 239 78 32.64% NG ST3 (56), ST1 (16), ST2 (1), ST4 (1), ST1 and 2 (1), ST1 and 3 (1), Unknown (3) [21]
PCR 170 10 5.88% NG ST3 (6), ST1 (3), ST2 (1) [22]
PCR 1020 37 3.63% Yes [47]
Smear 215 43 20.0% Yes [65]
Subtotal 1644 168 10.22% ST3 (62), ST1 (19), ST2 (2), ST4 (1), ST1 and 2 (1), ST1 and 3 (1), Unknown (3)
Shanghai PCR 1505 29 1.90% NG ST3 (17), ST1 (6), ST2 (1), ST6 (1), ST1 and 3 (2), Unknown (2) [21]
Zhejiang PCR 646 153 23.68% NG ST3 (93), ST1 (38), ST2 (7), ST4 (1), ST1 and 3 (6), ST1 and 2 (1), ST2 and 3 (1), Unknown (6) [21]
Beijing Smear/Trichrome 122 6 4.92% Yes [50]
Henan Smear/Iodine/In vitro culture 369 22 5.96% Yes [25]
Fujian Smear/Iodine 10,652 85 0.80% NG [7]
Heilongjiang PCR 381 27 7.10% Yes ST1 (12), ST3 (15) [55]
Total 107,695 3625 3.37% ST3 (186), ST1 (75), ST2 (10), ST4 (2), ST5 (2), ST6 (1), ST1 and 3 (9), ST1 and 2 (2), ST2 and 3 (1), ST3 + ST5 (1), Unknown (11)

NG: Not given.

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