Which statement about Cryptosporidium transmission is true?

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Multiple Choice

Which statement about Cryptosporidium transmission is true?

Chlorine’s limited effectiveness against Cryptosporidium oocysts is the essential point. These oocysts survive standard chlorine levels used in drinking-water treatment, so relying on chlorination alone won’t reliably inactivate them. Control relies on physical removal through adequate filtration (typically 1 micron or finer) and on disinfection methods that can inactivate oocysts, such as ultraviolet light or ozone. Cryptosporidium transmission occurs mainly through ingestion of contaminated water or food or through direct contact with infected people or animals; it is not spread via airborne spores, and seafood contamination is not the primary route. So the statement about chlorination not being effective correctly captures the key transmission/disinfection reality for this pathogen.

Chlorine’s limited effectiveness against Cryptosporidium oocysts is the essential point. These oocysts survive standard chlorine levels used in drinking-water treatment, so relying on chlorination alone won’t reliably inactivate them. Control relies on physical removal through adequate filtration (typically 1 micron or finer) and on disinfection methods that can inactivate oocysts, such as ultraviolet light or ozone. Cryptosporidium transmission occurs mainly through ingestion of contaminated water or food or through direct contact with infected people or animals; it is not spread via airborne spores, and seafood contamination is not the primary route. So the statement about chlorination not being effective correctly captures the key transmission/disinfection reality for this pathogen.

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