Table 4.
Prevalence of C. sinensis eggs according to age groups and river basins
| River basins | No. of positive / No. of examined (%) |
||||||||
|---|---|---|---|---|---|---|---|---|---|
| Total | 1-19 | 20-29 | 30-39 | 40-49 | 50-59 | 60-69 | 70-79 | 80- | |
| Han river | 47/4,655 | 1/242 | 7/719 | 3/327 | 11/652 | 17/965 | 4/917 | 4/706 | 0/115 |
| (1.0) | (0.4) | (1.0) | (0.9) | (1.7) | (1.8) | (0.4) | (0.6) | (0.0) | |
| Geum river | 438/6,728 | 2/302 | 5/163 | 7/342 | 48/738 | 127/1,330 | 122/1,746 | 107/1,638 | 15/390 |
| (6.5) | (0.7) | (3.1) | (2.0) | (6.5) | (9.5) | (7.0) | (6.5) | (3.8) | |
| Yeongsan river | 146/4,723 | 0/56 | 0/56 | 3/103 | 18/378 | 37/893 | 48/1,531 | 35/1,428 | 4/261 |
| (3.1) | (0.0) | (0.0) | (2.9) | (4.8) | (4.1) | (3.1) | (2.5) | (1.5) | |
| Seomjin river | 748/7,545 | 6/225 | 11/116 | 29/276 | 77/642 | 152/1,097 | 203/2,073 | 187/2,265 | 34/626 |
| (9.9) | (2.7) | (9.5) | (10.5) | (12.0) | (13.9) | (9.8) | (8.3) | (5.4) | |
| Nakdong river | 2,207/18,911 | 3/377 | 6/235 | 49/558 | 224/1,815 | 534/3,773 | 666/5,523 | 517/4,880 | 69/938 |
| (11.7) | (0.8) | (2.6) | (8.8) | (12.3) | (14.2) | (12.1) | (10.6) | (7.4) | |
| Total | 3,586/42,562 | 12/1,202 | 29/1,289 | 91/1,606 | 378/4,225 | 867/8,058 | 1,043/11,790 | 850/10,917 | 122/2,330 |
| (8.4) | (1.0) | (2.2) | (5.7) | (8.9) | (10.8) | (8.8) | (7.8) | (5.2) | |