Cryptosporidiosis is a diarrheal disease caused by the Cryptosporidium parasite. It primarily affects the intestines of humans and various animals. It is a common cause of recreational water illness worldwide, particularly problematic for individuals with weakened immune systems.
Transmission methods vary. Please consult CDC or WHO resources for specific information.
Contagious Period: Varies by disease
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Cryptosporidiosis is an important cause of gastroenteritis in Australia, typically spread through contaminated water, food, and contact with infected people or animals. It has historically shown a seasonal pattern, with peaks in summer and, in some livestock-dense states, spring. Multiple pool‑associated clusters have been reported in recent years, prompting public health alerts and swimming pool closures.
Source: BEACON - View Full Report
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Global disease surveillance and guidelines from the World Health Organization
View WHO Resources →Disease information on Virus Watcher is reviewed by our Chief Epidemiologist, a former CDC lead analyst for FluSight forecasting. Outbreak data is aggregated from verified sources including BEACON, ProMED, WHO, CDC, and 50+ national health agencies. This information is for educational purposes and should not replace professional medical advice.
Last reviewed: 2026-03-05
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