ARCHIVED - Cyclosporiasis


Nationally notifiable since 2000

1.0 National Notification

Only confirmed cases of disease should be notified.

2.0 Type of Surveillance

Routine case-by-case notification to the federal level

3.0 Case Classification

3.1 Confirmed case

Laboratory confirmation of infection in a person with or without clinical illness:

  • demonstration of Cyclospora cayetanensis oocysts in stool, duodenal/jejunal aspirate or small bowel biopsy

3.2 Probable case

Clinical illness in a person with evidence of:

  • an epidemiologic link to a confirmed case either by consumption of the same food or exposure to food known to be handled by a confirmed case
  • a history of travel to a cyclospora-endemic area

4.0 Laboratory Comments

5.0 Clinical Evidence

Clinical illness is characterized by watery diarrhea, loss of appetite, weight loss, abdominal bloating and cramping, increased flatus, nausea, fatigue and low-grade fever. Vomiting may also be noted. Relapses and asymptomatic infections can occur. Some evidence suggests that symptoms may be more severe and long-lasting in immunocompromised individuals.

6.0 ICD Code(s)

6.1 ICD-10 Code(s)

Other specified protozoal intestinal diseases (includes Cyclospora cayetanensis)

6.2 ICD-9/ICD-9CM Code(s)


7.0 Type of International Reporting


Probable case definitions are provided as guidelines to assist with case finding and public health management, and are not for national notification purposes.

The disease is not endemic in Canada; therefore, cases should be investigated as most likely associated with imported food or travel.

9.0 References

Centers for Disease Control and Prevention. MMWR 1997. Case definitions for infectious conditions under public health surveillance. Retrieved May 2008, from

Date of Last Revision/Review:

May 2008

Report a problem or mistake on this page
Please select all that apply:

Thank you for your help!

You will not receive a reply. For enquiries, contact us.

Date modified: