Targeting a waterborne foe

Discovered in 1976, cryptosporidium lurks worldwide in water, contaminating swimming pools, water parks, and drinking water supplies. Although it has even been featured on the comedy show The Colbert Report, it is no laughing matter - this microscopic pathogen is a leading cause of diarrhoea and malnutrition and the most common source of infection in immune-weakened people such as AIDS patients. It is also a potential bioterrorism agent...

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