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cryptosporidium |
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cryptosporidiumWaterborne parasite that causes disease in humans and other animals. It has been found in drinking water in the UK and USA, causing diarrhoea, abdominal cramps, vomiting, and fever, and can be fatal in people with damaged immune systems, such as AIDS sufferers or those with leukaemia. Just 30 cryptosporidia are enough to cause prolonged diarrhoea. Conventional filtration and chlorine disinfection are ineffective at removing the parasite. Slow sand filtration is the best method of removal, but the existing systems were dismantled in the 1970s because of their slowness. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| Microbial hazards, include bacteria, viruses and parasites, such as Vibrio cholerae, hepatitis A virus, and Crytosporidium parvum, respectively. Widespread outbreaks have occurred in recent years of cryptosporidiosis, a diarrheal disease caused by Crytosporidium parasites, from contaminated drinking or swimming water. This report compares three UV lamps, showing the methodologies necessary to measure the effective germicidal UV doses from polychromatic UV sources and the ability of the different lamps to inactivate heterotropic plate count bacteria, MS-2 coliphage, and Crytosporidium parvum. |
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