Greenwich residents who bought bagged shredded iceberg lettuce between June 29 and July 16 should check their refrigerators. The Food and Drug Administration on Saturday, July 18, announced a voluntary recall of all iceberg lettuce sourced from central Mexico by Taylor Farms de Mexico after a Cyclospora parasite outbreak sickened more than 1,600 people nationwide.

Connecticut is one of 27 states where the recalled product was distributed.

The recall covers shredded iceberg lettuce distributed between Monday, June 29, and Wednesday, July 16, under the brand labels CV, JB, Mark, MKTSD, PK, SUB, SY, and TF. Best-if-used-by dates on affected packages extend through Monday, Aug. 3. The FDA's recall notice does not name specific retailers, only brand abbreviations and product codes.

Taylor Farms supplies produce to major grocery chains and restaurants including Walmart, Trader Joe's, Taco Bell, KFC, and Pizza Hut, according to Forbes, though the recall notice does not confirm which retailers received the affected batches. The company said its branded salad kits do not contain iceberg lettuce and are not part of the recall.

The FDA said anyone who has the recalled lettuce should throw it away or return it to the store for a full refund. Consumers with questions can call Taylor Farms' customer care line at 855-455-0098, Monday through Friday, 8 a.m. to 5 p.m. Pacific time.

The FDA's traceback investigation identified Taylor Farms de Mexico as the single supplier of shredded iceberg lettuce served at Taco Bell locations in Indiana, Kentucky, Michigan, Ohio, and West Virginia, where the outbreak was first detected. Among 190 patients whose meals were analyzed, 90 percent reported eating iceberg lettuce, according to the FDA.

As of Saturday, July 18, the FDA reported 1,644 illnesses and 94 hospitalizations tied to the five-state outbreak. No deaths have been reported. Nationally, nearly 7,000 cyclosporiasis cases are confirmed or under investigation in 34 states since May 1, according to the CDC.

The Connecticut Department of Public Health confirmed 35 cyclosporiasis cases in the state as of Tuesday, July 14, the most recent figure available. At the same point last year, Connecticut had only 19 confirmed cases. The state's first case this season was reported Saturday, May 2.

The Connecticut DPH recommends purchasing whole heads of lettuce instead of pre-washed bagged mixes and washing all produce thoroughly under running water before eating.

Cyclospora infection can cause frequent diarrhea, stomach cramps, bloating, nausea, fatigue, and fever. Symptoms typically appear about one week after exposure but can show up as early as two days or as late as two weeks. Older adults, children, and people with weakened immune systems face higher risk of severe illness, according to the FDA.

Most people recover without treatment, though antibiotics can shorten the illness, according to the Connecticut DPH.

Dr. Gwen Biggerstaff of the CDC's Division of Foodborne, Waterborne, and Environmental Diseases said Thursday, July 17, that cooking produce to 158°F or higher kills the parasite.

The full list of recalled products, package sizes, and codes is available on the FDA's recall page. The Greenwich Health Department has not issued a local advisory as of Saturday, July 18.