Table 3.

Positive rate of C. sinensis according to gender and river basins

River basins	No. of positive / No. examined (%)
	Male	Female	Total
Han river	32/2,518 (1.3)	15/2,137 (0.7)	47/4,655 (1.0)
Geum river	307/3,076 (10.0)	131/3,628 (3.6)	438/6,728 (6.5)
Yeongsan river	84/1,915 (4.4)	62/2,808 (2.2)	146/4,723 (3.1)
Seomjin river	422/3,221 (13.1)	326/4,324 (7.5)	748/7,545 (9.9)
Nakdong river	1,306/8,555 (15.3)	901/10,327 (8.7)	2,207/18,911 (11.7)
Total	2,151/19,285 (11.2)	1,435/23,224 (6.2)	3,586/42,562 (8.4)