Table 2 Giardia duodenalis assemblages in samples collected from wastewater treatment plants and in sewer samples, Guangzhou, China
Sample location | No. of samples | No. of positive samples (%) | Assemblage (no. of samples) | ||||
|---|---|---|---|---|---|---|---|
gdh | tpi | bg | gdh | tpi | bg | ||
WWTP1 | 66 | 42 | 37 | 37 | A (37); G (3); B (2) | A (34); B (2); A + B (1) | A (33); B (3); A + B (1) |
WWTP2 | 28 | 19 | 19 | 19 | A (19) | A (19) | A (19) |
WWTP3 | 66 | 29 | 29 | 32 | A (27); C (1); B (1) | A (28); C (1) | A (31); C (1) |
WWTP4 | 78 | 42 | 39 | 39 | A (41); B (1) | A (38); B (1) | A (38); B (1) |
Sub-total | 238 | 132 (55.5%) | 124 (52.1%) | 127 (53.4%) | A (124); B (4); G (3); C (1) | A (117); B (3); C (2); A + B (1) | A (117); B (3); C (1); A + B (1) |
Sewer 1 | 11 | 5 | 5 | 5 | A (4); B (1) | A (5) | A (5) |
Sewer 2 | 11 | 0 | 0 | 0 | Â | Â | Â |
Sewer 3 | 11 | 0 | 0 | 0 | Â | Â | Â |
Sewer 4 | 11 | 0 | 0 | 0 | Â | Â | Â |
Sewer 5 | 11 | 1 | 0 | 1 | D (1) | Â | D (1) |
Sewer 6 | 11 | 6 | 5 | 4 | A (6) | A (3); B (1); F (1) | A (4) |
Sewer 7 | 11 | 6 | 5 | 5 | A (3); B (2); A + B (1) | A (2); B (3) | A (3); B (2) |
Sewer 8 | 11 | 10 | 7 | 7 | A (6); B (1); A + B (1); A + D (1); A + F (1) | A + B (1); A (5); B (1); A + B (1) | A (5); B (1); D (1) |
Sub-total | 88 | 28 (31.8%) | 22 (25.0%) | 22 (25.0%) | A (19); B (4); A + B (2); D (1); A + D (1); A + F (1) | A (15); B (5); F (2), A + B (1) | A (17); B (3); D (2) |
Total | 326 | 160 (49.1%) | 146 (44.8%) | 149 (45.7%) | A (143); B (8); G (3); C (1); D (1); A + B (2); A + D (1); A + F (1) | A (132); B (8); C (2); F (2), A + B (2) | A (134); B (6); C (1); D (2), A + B (1) |