다양한 소독제에 의한 감염성 크립토스포리디움 불활성화율 평가

Cell culture infectivity assay using HCT-8 cell was combined with most-probable-number technique to evaluate the inactivation of Cryptosporidium parvum by various disinfectants, including chlorine, ozone, and UV light. The assay was demonstrated to be as sensitive as animal infectivity assay, which...

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Published in:Daehan hwan'gyeong gonghag hoeji Vol. 29; no. 5; pp. 533 - 539
Main Authors: 변승헌(Seung Heon Byun), 이목영(Mok Young Lee), 조은주(Eun Ju Cho), 윤태호(Tae Ho Yoon), 김태호(Tae Ho Kim), 한선희(Sun Hee Han)
Format: Journal Article
Language:Korean
Published: 대한환경공학회 2007
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Summary:Cell culture infectivity assay using HCT-8 cell was combined with most-probable-number technique to evaluate the inactivation of Cryptosporidium parvum by various disinfectants, including chlorine, ozone, and UV light. The assay was demonstrated to be as sensitive as animal infectivity assay, which has been considered the "gold standard" for assessing Cryptosporidium oocyst infectivity, and a valuable tool to evaluate inactivation of C. parvum by disinfectants. Bench-scale inactivation study showed that at the condition of $5^{\circ}C$ and pH 7.0, CT value of $1,250mg{\cdot}min/L$ by chlorine and $16mg{\cdot}min/L$ by ozone were required to achieve approximately 1.0 log inactivation of C. parvum, suggesting that even ozone could not be sufficient to inactivate C, parvum at low. temperature. Unlike chlorine and ozone, UV light is very effective to inactivate C. parvum, regardless of temperature. A UV light dose of 2 $mJ/cm^2$ provided at least 3 log inactivation of C. parvum. 본 연구에서는 염소, 오존, UV에 의한 크립토스포리디움의 불활성화정도를 평가하기 위해 HCT-8세포를 사용하는 세포배양법과 최적확수기법을 결합하였다. 이 방법은 크립토스포리디움 감염성을 평가하는데 있어 "gold standard"라고 여겨지는 동물감염성 실험 만큼이나 민감하였고 소독제에 의한 크립토스포리디움의 불활성화를 측정할 수 있는 유용한 방법이었다. 실험실규모의 연구결과, $5^{\circ}C$, pH 7.0 조건에서 크립토스포리움을 약 1 log 불활성화시키기위한 염소와 오존 CT값은 각각 $1,250mg{\cdot}min/L,\;16mg{\cdot}min/L$ 이었다. 이는 오존을 사용하여 소독하였을 때 조차도 낮은 온도에서는 크립토스포리디움을 불활성화시키기 어렵다는 것을 보여주는 것이다. 염소와 오존과는 달리 UV는 온도에 상관없이 크립토스포리디움을 불활성화시키기에 매우 효과적이어서 UV가 2 $mJ/cm^2$ 조사되었을 때 크립토스포리디움이 3 log 이상 불활성화되었다.
Bibliography:KISTI1.1003/JNL.JAKO200709905752528
G704-000098.2007.29.5.004
ISSN:1225-5025
2383-7810