Cyclosporiasis outbreak hits California: doctor warns to skip fresh produce

A San Diego infectious disease doctor is telling people to steer clear of fresh produce for the next week or so, washed or not, as a fecal parasite outbreak spreads across the U.S. and now reaches California. The illness is cyclosporiasis, and cases are climbing fast.

What is cyclosporiasis

Cyclosporiasis is an intestinal infection caused by the cyclospora cayetanensis parasite, too small to see without a microscope. Illness is caused by consuming food or drink that contains the parasite and usually takes about a week to make a person sick.

Symptoms typically develop about two days to two weeks after exposure, including prolonged watery diarrhea, stomach cramps, nausea, fatigue, loss of appetite and weight loss.

Why washing may not be enough

Cyclospora is a hardy organism with the ability to adhere very well to the surfaces of fresh produce and fruit, according to Dr. Nuwan Gunawardhana of Columbia University Irving Medical Center. It is not really considered contagious from person to person.

Heat can destroy the parasite, making cooked vegetables a lower-risk option than raw produce, with cooking to an internal temperature of 158 degrees Fahrenheit or higher killing cyclospora, according to the Michigan Department of Health and Human Services.

Do you want to see how to make more plays? Do you want to find gains yourself?

Unusual Whales helps you find market opportunities through our market tide, historical options flow, GEX, and much, much more.

Create a free account here to start conquering the market with Unusual Whales.

Who is most at risk

People with weakened immune systems may want to avoid eating fresh produce altogether until a culprit is determined, given that this population is at a higher risk for severe disease.

Whole fruits and vegetables, including leafy greens, should not be avoided completely because they are still an important part of a healthy diet, and the CDC is urging consumers to track ongoing food safety alerts.

The market angle

Foodborne outbreaks tend to hit grocers, restaurants, and fresh produce distributors first. Recalls, softer produce demand, and menu changes are the typical playbook while an investigation is open.

Traders should watch for headlines naming a specific grower, distributor, or retailer as the source, which is usually when single-name moves happen.

Options market and stocks to watch

Names that could see flow tied to this story:

• KR: Watch Kroger for any produce recall exposure or sales impact from cautious shoppers.
• WMT: Walmart is the largest U.S. grocer, so watch for supply chain and recall headlines.
• CMG: Chipotle has a history of trading on foodborne illness news, watch for sympathy moves.
• SYY: Sysco is a major food distributor, watch for exposure if a supplier is named.
• FDP: Fresh Del Monte is a direct fresh produce play worth monitoring.

Want more market intelligence? Create your free Unusual Whales account for options flow, market tide, GEX, and the full toolkit.