Cyclosporiasis is usually diagnosed symptomatically in clinical settings, including the presence of watery diarrhea, abdominal cramping, and bloating. In untreated, immunocompetent people, the diarrhea can last from days to weeks to a month or more and can wax and wane, with variable oocyst shedding. Oocysts can continue to be shed (intermittently or continuously) by non-symptomatic people, and symptoms can also persist in the absence of oocysts in feces. In a clinical context, conventional diagnosis usually involves microscopic examination of intestinal tissue biopsy sections, stool samples for the presence of developmental stages of Cyclospora, or advanced molecular testing for DNA. Improved specificity and sensitivity have been possible largely through the use of PCR (polymerase chain reaction), which enables the specific amplification of genetic loci from tiny amounts of genomic DNA of Cyclospora. Because of the intermittent nature of oocyst shedding and the low numbers of this stage in feces, it is recommended that multiple stool samples be collected at 2-3 day intervals over a period of more than a week, to increase the likelihood of identifying the disease microscopically.
Foodborne Illnesses / Cyclospora /
How is Cyclospora Diagnosed?
Cyclospora outbreaks and recalls
October 23, 2022
A 2020 Cyclospora Outbreak
October 20, 2022
The Cyclospora Outbreak of 2022: A Quick Guide
Latest Information The number of reported cases of domestically acquired cyclosporiasis illnesses has increased by 260 cases since the last update on August 25, 2022. Cases continue to be reported...
October 03, 2022
Over 1,000 with Cyclospora with no know source
September 01, 2022
Cyclospora in the United States hits 800