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1. General information and definitions
1.1 Water and pathogens
Natural waters contain a large number of compounds that can be classified by size (suspended matter, colloids, dissolved compounds such as organic or mineral matter, ionized or not). They also carry numerous micro-organisms, some of which can be pathogenic.
The aim of disinfection is therefore to eliminate or at least inactivate these pathogens in order to prevent waterborne disease.
Tables A, B and C in [ ] present various bacteria, viruses and cysts that can be carried by water.
These germs may be responsible for harmless infections (e.g. gastro-enteritis, diarrhoea), but unfortunately sometimes for serious or even fatal infections...
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General information and definitions
Standards and disinfection control
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1 Microbiology
WHO (World Health Organization) recommendations for Europe (see tables 4 and 5 ), and the USA (see table
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