| Title |
Detection of Giardia and Crpptosporidium in Water Supplies in Seoul Using Method 1623 |
| Authors |
이목영(Mok Young Lee),김도연(Do Yeon Kim),조은주(Eun Ju Cho),이의광(Eu Kwang Lee),오세종(Sea Jong Oh),이채근(Chae Keun Lee),하영칠(Yung Chil Hah) |
| Abstract |
Giardia cysts and Cryptosporidium oocysts in water samples were detected simultaneouly using 1623 Method, which combined capsule/membrane filtration and immunomagnetic separation with immunofluorescence assay. In this study, raw water samples from 6 intakes, finished and tap water samples supplied from Kueui Water Treatment Plants in Seoul, and Wangsuk creek water samples were tested from April 1999 to February 2000, to estimate the prevalence of two protozoa in Seoul drinking water supplies. Giardia cysts were found in 25∼75% of water samples from 6 intakes in the range of 0∼9.7/10L. Cryptosporidium oocysts were found in 0∼50% of six intake water samples in the range of 0∼4/10L. Raw water samples from Kueui. Jayang, Pungnap intakes showed significantly higher concentration and more frequent incidence of Giardia than that from Paldang, Kangbuk. Amsa intakes. It seemed that Wangsuk creek acts as an important source of Giardia pollution in Kueui, Jayang. Pungnap intakes because all samples from Wangsuk creek, flowing in upstream of Kueui intakes, contained 19∼109/l0L of Giardia cysts. No Cryptosporidium and Giardia were found in all finished and tap water sample. We concluded that Giardia cysts are more often found in raw surface waters of Seoul than Cryptosporidium oocysts, although two protozoa were not detected in treated water samples of Kueui Water Treatment Plant. |