As of 2008 cysts are commonly detected in surface water in Russia. Water treatment plants in Moscow are occasionally contaminated with the parasites and in many cities in Russia – including Saint Petersburg – the reputation of municipal water is so bad that residents preemptively boil drinking water.
Giardia
Cryptosporidium
Salmonella
Entamoeba histolytica
Shigella
Faecalibacterium
Cheyletiella
Entamoeba coli