Transcription of 11 Microbial fact sheets - WHO
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221 fact sheets are provided on potential waterborne pathogens as well as on indicatorand index potential waterborne pathogens include: bacteria, viruses, protozoa and helminths identified in Table and Figure ,with the exception ofSchistosoma, which is primarily spread by contact with contaminated surface water during bathing and washing; potentially emerging pathogens, including Helicobacter pylori,Tsukamurella,Isospora belliand microsporidia, for which waterborne transmission is plausi-ble but unconfirmed; Bacillus, which includes the foodborne pathogenic species Bacillus cereusbut forwhich there is no evidence at this time of waterborne transmission; and hazardous human health effects caused by waterborne transmission vary in severity frommild gastroenteritis to severe and sometimes fatal diarrhoea, dysentery, hepatitis andtyphoid fever.
11. MICROBIAL FACT SHEETS 225 Significance in drinking-water Despite frequent isolation ofAeromonas spp. from drinking-water, the body of evidence does not provide significant support for waterborne transmission.
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