You might not be able to see this parasite, but you won’t forget it once you’ve had it!
Cryptosporidium, also known as “crypto” is a protozoal parasite responsible for causing diarrhoea in young stock and people. There are many different types of crypto, the most important type for New Zealand being Cryptosporidium parvum.
Crypto is spread in small capsules called oocysts, which are found in the faeces of infected individuals. Sick animals can excrete very high numbers of the infectious oocysts, leading to an area becoming highly contaminated very quickly. Others can become infected through exposure to contaminated water sources, feed, bedding and surfaces. It can take two to seven days for animals to become sick after being in contact with it. This organism can cause moderate to severe diarrhoea and can cause death, particularly if the calves/lambs are already unwell.
It is important to remember that crypto is a zoonotic disease and is notifiable to the Ministry of Health. In people, crypto can cause diarrhoea, fever, nausea and vomiting. People who are immunocompromised should avoid handling young animals and care should be taken with children around young animals. Good hygiene practices are vital for preventing spread of disease, especially proper hand washing.
