Cyclosporiasis, an intestinal infection induced by the parasite Cyclospora Cayetanensis, has made headlines in recent weeks as cases have surged across several U.S. states. These outbreaks have led to a spike in patients seeking treatment for the infection and driven consumers to avoid salads (and Taco Bell) for many others. Consumer Edge’s Hydrus dataset, an open medical claims dataset that offers the lowest latency medical claims signal on the market, has tracked the rise in cases in recent weeks. While cyclosporiasis case counts typically peak in the summer months each year, Hydrus data clearly shows that this summer’s outbreak is outsized; the number of unique patients observed in the week ending 7/25/26 is over ~10x the number observed in historical peak summer weeks.
Despite the magnitude of the spike, this outbreak is largely concentrated in select states. States in the Midwest, such as Michigan, Ohio, Indiana, and Illinois, have been hardest hit thus far. Michigan alone accounts for 35 – 40% of cases in recent weeks, aligning with the CDC’s reporting on the outbreak.
Hydrus data also provides unique insight into granular patient attributes, including the share of cases by patient age. Accounting for the age distribution of the U.S. population, Hydrus data shows that older adults, who are more likely to experience severe complications from Cyclospora, are seeking treatment at higher rates; adults over the age of 65 account for only ~18% of the U.S. population but 25 – 30% of the patients diagnosed with Cyclospora in Hydrus in July, with the proportion increasing across recent weeks.
With containment of this outbreak still in question, real-time tracking of Cyclosporiasis case counts and patient attributes remains imperative to understanding its impact across the U.S. in the coming weeks. Consumer Edge will continue to monitor Hydrus data for signs that the outbreak is spreading significantly beyond the Midwest or shifting further toward more vulnerable age groups.
How business leaders use this data
- Public health and epidemiology teams track outbreak case counts in near real time, instead of waiting weeks for official case confirmations.
- Investor and strategy teams monitor state-level case concentration to size regional exposure across restaurant, grocery, and fresh-produce supply chains.
- Healthcare and pharma commercial teams measure which patient age groups are seeking treatment to anticipate demand for diagnostics and care.
See how Consumer Edge works with healthcare and consumer brands
Notes: Hydrus is Consumer Edge’s open medical claims dataset. National unique patient counts reflect Hydrus’s 2021 provider panel; state and age cuts reflect raw claims. Counts for the most recent weeks may revise upward as additional claims are reported.
