Definition of cryptosporidium in US English:



  • A parasitic coccidian protozoan found in the intestinal tract of many vertebrates, where it sometimes causes disease.

    Genus Cryptosporidium, phylum Sporozoa

    • ‘There's a parasite called cryptosporidium that's resistant to chlorine, that causes most of the outbreaks that we're hearing about right now.’
    • ‘It's a parasite called cryptosporidium, and once it gets into the pool it's resistant to the levels of chlorine that normally are found in pools.’
    • ‘Another family have reported that all four children have been diagnosed with cryptosporidium, a waterborne parasite.’
    • ‘Chlorine is added during water treatment to kill bacteria, although some bugs such as cryptosporidium are extremely resistant to it.’
    • ‘Engineers believe the new technology will cut the risk of an outbreak of waterborne bacteria such as cryptosporidium.’
    • ‘The deep pits may drain water from an already thirsty ecosystem and expose underground drinking-water supplies to contaminants such as giardia and cryptosporidium.’
    • ‘Manure from factory farms has been linked to diseases such as E. coli, listeria, and cryptosporidium.’
    • ‘We are the first country in the world to bring this level of monitoring and regulation on cryptosporidium.’
    • ‘But new national guidelines say the lack of a filtration system and automatic chemical treatment can lead to the development of the cryptosporidium bug, which can cause severe gastro-intestinal infections.’
    • ‘Viruses, cryptosporidium, and giardia require very high dosages of disinfectant or longer contact times with the disinfectant than the standard recommendations.’
    • ‘It is also effective against cryptosporidium, the waterborne organism that caused more than 100 deaths in Milwaukee in 1993.’
    • ‘But the report by two public health experts suggests the Glasgow boil water notice, issued when the cryptosporidium count started to escalate rapidly, was unnecessary.’
    • ‘Around 140,000 people in Glasgow were last night advised to boil all tap water in their homes for drinking, food, brushing teeth and bathing babies after the parasite cryptosporidium was found in supplies.’
    • ‘She showed how you can identify and measure those nasty germs cryptosporidium and giardia.’
    • ‘He died from cryptosporidiosis in 1997 several years after he had been infected with the parasite cryptosporidium.’
    • ‘Yet while these discoveries of pollution have been made, continuous tests of the water from various laboratories have come back either zero for cryptosporidium or indicating very low levels, all well within EU directives.’
    • ‘The resulting water is even free of viruses, bacteria and spores from cryptosporidium or giardia.’
    • ‘We are all working together to ensure that every possible precautionary measure is taken to avoid further cases of cryptosporidium.’
    • ‘Work to reduce the number of properties subject to sewer flooding and protecting customers from the potentially harmful parasite cryptosporidium, have forced the company to rethink its pricing.’
    • ‘But now a researcher at the Australian National University has invented a filter which can quickly and cheaply kill the cryptosporidium bug.’


Early 20th century: from crypto- ‘concealed’ + modern Latin sporidium ‘small spore’.