... Cholera, Typhoid,Salmonella,Serratia,E.Coli, Fecal Coliform>99.99% Ceramic Filter: Filter our dust, rust, cyst, Cryptosporidium & Giardia ... is inhibited from occurring within this ceramic element (which is possible with the other ceramic filter elements). This silver content ... by international standards. Because of the silver, Sterasyl ceramic filters do not require sterilization after cleaning.Remove ...