Statutory notification

Public health management

Important information

  • Infectious agent: Cryptosporidium parvum and Cryptosporidium hominis parasite.
  • Transmission:  Faecal-oral, water-borne (for C. hominis and C. parvum) and animal-person (for C. parvum).
  • Incubation period: 1 to 12 days (usually 7 days).
  • Infectious period: The oocyts of the parasite are the infectious stage, and are present in the faeces of symptomatic people. Excretion of the oocyts can continue for several weeks after symptoms cease. Use contact transmission- based precautions for hospitalised and institutionalised patients.
  • Case exclusion: Until asymptomatic, including normal stools, for 24 hours. If patient works in health-care, aged-care, child-care or is a food handler or attends child-care exclude until asymptomatic, including normal stools, for 48 hours. Cases should also avoid using public swimming pools for two weeks after the first normal stool. See OD 0645/16 Guidelines for exclusion of people with enteric infections and their contacts from work, school and child-care settings (external site).
  • Contact exclusion: Do not exclude.
  • Treatment: Oral rehydration and as recommended by the doctor.
  • Immunisation:  None available.
  • Case follow up: Generally only clusters or outbreaks investigated, by the public health units (Healthy WA) with assistance from the Communicable Disease Control Directorate.


Notifiable disease data and reports

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Public Health