Cyclosporiasis Outbreak 2026

As cyclosporiasis cases continue to rise, with the largest increase occurring in Southeast Michigan, the Michigan Department of Health and Human Services (MDHHS) is providing additional recommendations to help prevent foodborne illness related to fresh produce. As of July 5, 2026, no specific produce grower/supplier, or specific produce type has been identified as the source of the outbreak.

MDHHS recommends that entities in Southeast Michigan who are preparing, processing, or serving raw produce, including restaurants and other commercial kitchens, take the following steps to reduce risks of exposure:

• Lettuce/leafy greens: Buy whole heads of lettuce (rather than prewashed, bagged lettuce or salad mixes), throw away the outer two–three layers of leaves and wash the inner leaves under running water. For leafy greens that can be cooked, cooking is the safest option.
• Cilantro, basil: Wash thoroughly under running water, separating the leaves. Safest when cooked.
• Green onions: Trim the root end and remove the outer layer, wash thoroughly under running water. Safest when cooked.
• Raspberries: Their bumpy surface makes them especially hard to clean; the parasite can hide in the tiny crevices. Safest when cooked (pies, jams etc.). Consider frozen raspberries as an alternative. Freezing may reduce but does not guarantee elimination of the parasite.
• Snow peas: Wash under running water and rub the surface. Safest when cooked.