Outbreak Source Identified
Michigan Health Officials Identify Lettuce and Salad Greens as Outbreak Source
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Michigan health officials have identified lettuce and salad greens as the leading suspected source of a rapidly growing cyclosporiasis outbreak. As of July 13, the state has confirmed 2,640 cases — far above its typical annual numbers — according to WLTX.
Cyclosporiasis is an intestinal illness caused by a microscopic parasite called Cyclospora cayetanensis. It spreads through contaminated food or water and causes what health officials have called 'explosive' diarrhea, along with cramping, nausea, and fatigue. The illness can last weeks if untreated.
Case Count Surges Far Beyond Normal Levels
Michigan typically sees only a handful of cyclosporiasis cases each year. The current outbreak, with 2,640 confirmed cases as of July 13, is a dramatic spike by any measure, according to 13WMAZ. Health officials say the numbers are still climbing, and the true total may be higher since many people never get tested.
Officials have not yet named a specific brand or product to avoid. They describe the source as lettuce and salad greens broadly, based on early evidence from case interviews. Investigators are still working to narrow down the exact supply chain link, according to WWLTV.
What Cyclospora Is and Why It's Hard to Catch Early
Cyclospora cayetanensis is a one-celled parasite too small to see without a microscope. It is not spread person-to-person. Instead, it gets onto food when crops are exposed to contaminated water or soil, according to Fox 61. This makes it especially hard to trace quickly.
Symptoms usually start one to two weeks after eating contaminated food. They include watery diarrhea that can be explosive, loss of appetite, bloating, and fatigue. Without the antibiotic trimethoprim-sulfamethoxazole, symptoms can drag on for a month or more. Many mild cases go unreported.
Salad Greens Under Scrutiny as Investigation Continues
Officials pointed to lettuce and salad greens after reviewing what sick people reported eating before they got ill. This type of early food-exposure data is a standard first step in outbreak investigations. Michigan authorities have not issued a formal recall or advisory to stop eating salads yet, according to WLTX.
Past U.S. cyclosporiasis outbreaks have been linked to fresh produce before. Basil, cilantro, and bagged salad mix have all been tied to past cases in other states. Getting a confirmed link typically requires matching the parasite's genetic signature to a specific product or farm, which takes time.
What Michigan Residents Should Do Right Now
Health officials urge anyone with prolonged watery diarrhea lasting more than a few days to see a doctor and ask to be tested for Cyclospora specifically. Standard stool tests do not always catch it. Doctors need to order a special test, according to 13WMAZ.
Washing produce reduces some risk but does not fully remove Cyclospora. Cooking kills the parasite. Until officials name a specific product, residents can take caution with raw leafy greens, especially in large prepared salads. More guidance is expected as the investigation moves forward, according to WWLTV.
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