Removal Effect of the Water purifier for Home Use against Cryptosporidium parvum Oocysts

Abstract

ABSTRACT. The removal effects of the faucet mounted type water purifier for home use were examined against Cryptosporidium parvum oocysts. The water purifier is composed of a layer of granular activated carbon and the hollow fiber membrane filter. The cartridges were unused, 25%, 50% and 75% flow down by Arizona-dust of U. S. A. Two respective cartridges were used of the examination. Th e faucet and the water purifier were connected by anti-pressure tube, and 3.0 × 10 7 oocysts of Cryptosporidium parvum were injected into anti-pressure tube while water was running. Twenty liter of collected purified water was examined under the fluorescent microscope. Any oocysts in the purified water collected from all cartridges were not found. Therefore, we considered this purifier as an effective one in removing Cryptosporidium oocysts from drinking water. KEY WORDS: Cryptosporidium oocyst, removal effect, water purifier.

Detection ofCryptosporidiumandCyclosporaOocysts from Environmental Water for Drinking and Recreational Activities in Sarawak, Malaysia

“…Cryptosporidium can be inactivated by boiling at 72.4°C or higher or at 64.2°C at least for 2 minutes [ 46 ]. Alternatively, water purifiers with 1 μ m filter can be used [ 47 , 48 ]. The infection is riskier to animals through contaminated drinking water.…”