Table 4. Subtype distribution of human Blastocystis sp. isolates from different countries.
| Country (Ref) | Participant (no. of sample) | Subtype distribution |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| ST1 | ST2 | ST3 | ST4 | ST5 | ST6 | ST7 | ST8 | ST9 | Unk/MSI | ||
| Libya* | Symptomatic (29) | 15 | 5 | 8 | - | - | - | - | - | - | 1 |
| Asymptomatic (16) | 8 | 6 | - | - | - | - | - | - | - | 2 | |
| Libya [52] | Outpatient (38) | 19 | 3 | 15 | - | - | - | 1 | - | - | - |
| Australia [72] | Patients (91) | 28 | 5 | 40 | 12 | - | 3 | 1 | 2 | - | - |
| Bangladesh [55] | Symptomatic (11) | 1 | - | 10 | - | - | - | - | - | - | - |
| Asymptomatic (15) | 1 | - | 14 | - | - | - | - | - | - | - | |
| Brazil [73] | Indigenous community (66) | 27 | 21 | 11 | - | - | - | - | - | - | 7 |
| China [23] | Symptomatic (16) | 9 | - | 2 | - | - | - | - | - | - | 5 |
| Asymptomatic (19) | 4 | - | 12 | - | - | - | 2 | - | - | 1 | |
| China [60] | Rural community (78) | 16 | 1 | 55 | 1 | - | - | - | - | - | 5 |
| Denmark [29] | General population (24) | 2 | 3 | 6 | 9 | - | - | - | - | 1 | 3 |
| Patients (92) | 19 | 19 | 15 | 11 | - | - | 5 | - | - | 23 | |
| Denmark [74] | Patients (99) | 20 | 15 | 39 | 16 | - | 1 | - | 1 | - | 7 |
| Egypt [67] | Symptomatic (28) | 8 | - | 16 | - | - | 4 | - | - | - | - |
| Asymptomatic (16) | - | - | 8 | - | - | 4 | 4 | - | - | - | |
| Egypt [75] | IBS patients (51) | 15 | - | 22 | - | - | 8 | - | - | - | 6 |
| Control (49) | - | - | 17 | - | - | 15 | 13 | - | - | 4 | |
| France [13] | Symptomatic (25) | 4 | 4 | 13 | 2 | - | - | - | - | - | 2 |
| Asymptomatic (15) | 4 | - | 7 | 2 | - | - | 1 | - | - | 1 | |
| France [76] | HM patients (15) | - | - | 3 | 10 | - | 1 | 1 | - | - | - |
| Control (12) | 1 | 1 | 1 | 7 | - | - | 2 | - | - | - | |
| Germany [55] | Patient (12) | 3 | 2 | 5 | 2 | - | - | - | - | - | - |
| Greece [77] | Symptomatic (19) | - | - | 18 | 1 | - | - | - | - | - | - |
| Asymptomatic (32) | 7 | 5 | 14 | - | - | 1 | 5 | - | - | - | |
| Iran [78] | Patient (45) | 20 | 4 | 16 | - | - | 2 | 3 | - | - | - |
| Ireland [79] | Healthy persons (14) | 1 | 6 | 4 | 3 | - | - | - | - | - | - |
| Italy [14] | Symptomatic (34) | 3 | 7 | 16 | 6 | - | - | 1 | 1 | - | - |
| Japan [55] | Patient (50) | 4 | 0 | 26 | 2 | 0 | 11 | 5 | 0 | 2 | 0 |
| Lebanon [80] | Symptomatic (19) | 10 | 5 | 3 | - | - | - | - | - | - | - |
| Asymptomatic (18) | 1 | 7 | 9 | 1 | - | - | - | - | - | - | |
| Liberia [52] | Schoolchildren (30) | 7 | 7 | 8 | 3 | - | - | - | - | - | 5 |
| Malaysia [81] | HIV patient (20) | 3 | 1 | 11 | 5 | - | - | - | - | - | - |
| Cancer patient (20) | 2 | 1 | 9 | 6 | - | - | - | - | - | 2 | |
| Mexico [30] | IBS patients (14) | 2 | 1 | 2 | - | - | - | - | - | - | 9 |
| Control (6) | - | - | 3 | - | - | - | - | - | - | 3 | |
| Nepal [10] | Symptomatic (20) | 4 | 4 | 12 | - | - | - | - | - | - | - |
| Nigeria [52] | Patient (23) | 10 | - | 9 | 3 | - | - | - | - | - | 1 |
| Pakistan [55] | Symptomatic (10) | 2 | - | 7 | - | - | 1 | - | - | - | - |
| Pakistan [82] | IBS patients (123) | 75 | 6 | 23 | 6 | 3 | 3 | 5 | - | - | 2 |
| Control (56) | 12 | 4 | 26 | 2 | 4 | 3 | 5 | - | - | - | |
| Singapore [54] | Patient (9) | 2 | - | 7 | - | - | - | - | - | - | - |
| Spain [22] | Symptomatic (51) | 1 | 2 | - | 48 | - | - | - | - | - | - |
| Sweden [83] | Patient (63) | 10 | 9 | 30 | 13 | - | - | 1 | - | - | - |
| Thailand [84] | Army personnel (153) | 138 | - | 7 | - | - | - | 2 | - | - | 6 |
| Thailand [85] | Schoolchildren (68) | 53 | 15 | - | - | - | - | - | - | - | - |
| Tanzania [86] | Healthy persons (6) | 1 | 3 | 2 | - | - | - | - | - | - | - |
| Turkey [12] | Symptomatic (69) | 6 | 9 | 53 | 1 | - | - | - | - | - | - |
| Asymptomatic (18) | 2 | 3 | 13 | - | - | - | - | - | - | - | |
| UK [47] | Patient (54) | 3 | 9 | 22 | 17 | - | - | - | 3 | - | - |
| UK [52] | IBS patients (136) | 14 | 10 | 56 | 51 | - | 1 | 1 | 3 | - | - |
| Control (135) | 20 | 16 | 58 | 34 | 2 | - | 3 | 2 | - | - | |
| USA [65] | Symptomatic (9) | 1 | - | 6 | - | - | - | - | - | - | 2 |
| Total sample | 2141 | 618 | 219 | 789 | 274 | 9 | 58 | 61 | 12 | 3 | 97 |
Current study (*), mixed subtype infection (MSI), unknown (Unk), irritable bowel syndrome (IBS), hematological malignancies (HM), symptomatic (with gastrointestinal symptoms), asymptomatic (without gastrointestinal symptoms).