Effectiveness of water treatment for the removal ofCryptosporidiumandGiardiaspp
| Autor: | Anna Bajer, B. Toczylowska, Małgorzata Bednarska, Edward Siński |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Giardiasis
Veterinary medicine Epidemiology Cryptosporidiosis Cryptosporidium Fluorescent Antibody Technique Portable water purification Biology Polymerase Chain Reaction Water Purification Microbiology Tap water Water Quality parasitic diseases Humans Raw water Likelihood Functions Models Statistical Drinking Water Giardia Oocysts DNA Protozoan biology.organism_classification Infectious Diseases Water treatment Poland Water quality Surface water |
| Zdroj: | Epidemiology and Infection. 140:2014-2022 |
| ISSN: | 1469-4409 0950-2688 |
| DOI: | 10.1017/s0950268811002780 |
| Popis: | SUMMARYCryptosporidiumandGiardiaare intestinal parasites of humans and of many other species of animals. Water constitutes an important route of transmission for human infections in both developed and developing countries. In Poland, contamination of water sources with oocysts/cysts is not routinely monitored and scientific research in this field is scarce. Our aim was to compare the contamination of surface and treated water and thus the success of water treatment processes. Water samples (n=94) of between 30 l (surface water) to over 1000 l for tap water, were taken in the period of 2008–2009 using specially constructed equipment with cartridge filtration (Filta-Max; IDEXX, USA). Immunofluorescent assay, and nested polymerase chain reaction were used for the detection of parasites.Cryptosporidiumoocysts were found in 85% of surface water and in 59% of raw (intake) water samples. Oocysts were also detected in treated water (16%) but were absent in samples of swimming pool water. The highest mean number ofCryptosporidiumoocysts [geometric mean (GM)=61/10 l] was found in samples of rinsing water.Giardiacysts were observed in 61% of surface water samples, in 6% of raw water and in 19% of treated water, with the highest number of cysts noted in rinsing water samples (GM=70 cysts/10 l). Our study highlights the frequent occurrence of parasites in surface waters in Poland and the effectiveness of water treatment for the removal of parasites from drinking water. |
| Databáze: | OpenAIRE |
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