Outbreaks in Illinois

Below are outbreaks, investigations, disease concerns, and increased activity in 2020 that include cases in Illinois or have a wide impact in Illinois.

Cyclospora Case Increase and Cluster Investigation

The Illinois Department of Public Health has identified an increase in Cyclospora cases in Illinois since June 1, 2020.  As of August 5, 2020, at least 257 laboratory confirmed domestically acquired cases have been reported to IDPH among Illinois residents.  A public health investigation is being conducted to determine the source(s).

People can become infected with Cyclospora by consuming food (typically fruits and vegetables) or water contaminated with the parasite.

The most common symptom of Cyclospora infection is watery diarrhea. Other symptoms can include stomach cramps, nausea, vomiting, fatigue, loss of appetite, weight loss, muscle aches, and low-grade fever.  Symptoms typically begin one to two weeks after exposure and can be treated with specific antibiotics.  If not treated, the illness may last from a few days to a month or longer. Symptoms may seem to go away and then return one or more times (relapse). People that are experiencing symptoms of Cyclospora should contact their health care provider for testing. 

A public health investigation is being conducted, including interviewing cases of Cyclospora to identify food exposures.  Laboratories and health care providers should report cases promptly so public health workers can interview the cases as soon as possible.

In the United States, foodborne outbreaks of cyclosporiasis have previously been linked to various types of fresh produce such as raspberries, basil, cilantro, snow peas, and lettuce.

You can learn more about Cyclospora here:  http://dph.illinois.gov/topics-services/diseases-and-conditions/diseases-a-z-list/cyclospora

Multistate Outbreak of Cyclospora Infections Linked to Bagged Salad Mix

CDC, public health and regulatory officials in several states, and the U.S. Food and Drug Administration (FDA) are investigating a multistate outbreak of Cyclospora infections linked to bagged salad mix containing iceberg lettuce, carrots, and red cabbage produced by Fresh Express. Products were sold in many states under either the brand name Fresh Express or the store brand labels ALDI Little Salad Bar, Giant Eagle, Hy-Vee, Jewel-Osco Signature Farms, ShopRite Wholesome Pantry, and Walmart Marketside.

Illinois has 206 confirmed cases of Cyclospora included in this outbreak investigation.  For additional information regarding this investigation, visit https://www.cdc.gov/parasites/cyclosporiasis/outbreaks/2020/index.html.

Updated Date:
August 6, 2020