Outbreaks in Wisconsin

Outbreaks and Investigations

Below is a list of selected outbreaks and investigations with wide impact in Wisconsin.

Cyclosporiasis Linked to Vegetable Trays
Final Update 9/07/18

Store bought vegetable tray

  • The Department of Health Services (DHS), the Wisconsin Department of Agriculture, Trade, and Consumer Protection (DATCP), and local health departments are working with the Centers for Disease Control and Prevention (CDC) and the U.S. Food and Drug Administration (FDA) to investigate an outbreak of cyclosporiasis linked to the consumption of Del Monte vegetable trays sold at Kwik Trip.
    • 177 cases report consuming a Del Monte vegetable tray purchased at a Kwik Trip location in Wisconsin. Most ill persons reported purchasing the tray on or after May 16, 2018. Kwik Trip voluntarily removed the trays from sale in their stores on June 8, 2018.
    • Consumers should not eat 6 oz. or 12 oz. Del Monte vegetable trays (containing broccoli, cauliflower, carrots, and dill dip) purchased at a Kwik Trip location.
    • Del Monte issued a recall of 6 oz, 12 oz, and 24 oz vegetable trays with dip. See the FDA website for full details.
  • As of September 5, 2018, CDC was notified of 250 laboratory-confirmed cases of Cyclospora infection in people from 4 states who reported consuming pre-packaged Del Monte Fresh Produce vegetable trays containing broccoli, cauliflower, carrots, and dill dip.
  • Based on epidemiological data or traceback evidence, it was not possible to determine if an individual component of the vegetable trays was the likely vehicle of infection. Read the related statement from the FDA for additional information.
  • See the DHS cyclosporiasis fact sheet for more information on common symptoms and treatment of cyclosporiasis. If you have any symptoms of cyclosporiasis, please contact your doctor.
  • Additional information can be found on the following websites:

Salmonellosis Linked to Kellogg's Honey Smacks Cereal
Updated 9/05/18

Bowl of dry breakfast cereal

Cyclosporiasis Linked to Salads Sold at McDonald's Updated 8/03/18

Multistate Outbreak of Salmonella Infections Linked to Contact with Backyard Poultry
Updated 7/27/18

  • Chickens feeding on the grassThe Department of Health Services (DHS) and local health departments are working with the Centers for Disease Control and Prevention (CDC) to investigate a multistate outbreak of Salmonella infections linked to contact with backyard poultry.
  • As of July 13, 2018, the CDC reports 212 people infected with an outbreak strain of Salmonella. Children younger than 5 years account for 26% of illnesses.
  • In Wisconsin, 18 laboratory-confirmed cases of Salmonella have been linked to the national live poultry outbreak.
  • Outbreaks of Salmonella infections linked to contact with backyard poultry happen every year in the U.S. Many of these infections are preventable. Please see our Backyard Poultry flyer for more information about how to prevent these infections.

Salmonellosis Linked to Cut Melons
Updated 6/19/18

Fresh melon cut up and ready to eat

  • DHS and the Wisconsin Department of Agriculture, Trade and Consumer Protection (DATCP are alerting Wisconsin consumers to a multistate outbreak of Salmonella Adelaide infections linked to the consumption of pre-cut melons. At this time, no cases have been identified in Wisconsin residents, but the recalled products were sold at locations in the state.
  • The FDA has identified Costco stores in the following Wisconsin cities as having distributed the recalled pre-cut melon: Bellevue (Green Bay), Grafton, Grand Chute, Menomonee Falls, Middleton, New Berlin, Pewaukee, Pleasant Prairie, and Sun Prairie.
  • The full list of stores distributing this product is available on the FDA’s website and may expand to include other stores as the investigation continues. Consumers who have purchased recalled pre-cut melon from these stores, including fruit salad mixes with pre-cut melon, should not eat it and throw it away.
  • To date, no cases have been reported in Wisconsin, but public health officials continue to monitor for cases. Nationally, 60 people infected with the Salmonella strain have been reported in other Midwest states. States that have reported illnesses include Illinois (six cases), Indiana (11 cases), Michigan (32 cases), Missouri (10 cases), and Ohio (one case).
  • Additional information can be found on the following websites:

Synthetic Cannabinoids (K2, Spice)
Updated 6/26/18

  • Updated case counts in Wisconsin can be found on our synthetic cannabinoid webpage.
  • The CDC is investigating this outbreak(link is external) across the nation.
  • Share our one-page fact sheet on synthetic cannabinoids (PDF) . Now available in English and Spanish.
  • If you have purchased any of these products in the past month, do not use it. If you have used any of these products, and start experiencing severe, unexplained bleeding or bruising, please have someone take you to the hospital immediately or call 911. Image of Synthetic Cannabinoids fact sheet "K2, Spice, Black Mamba, Fake Weed, Green Giant"

E. coli O157:H7 Linked to Romaine Lettuce
Final Update 6/28/18

  • The Wisconsin Department of Health Services (DHS), the Centers for Disease Control and Prevention (CDC), U.S. Food and Drug Administration (FDA), and numerous other states investigated a multistate outbreak of E. coli O157:H7 infections.
  • Epidemiologic, laboratory, and traceback evidence indicated that romaine lettuce from the Yuma growing region was the likely source of this outbreak.
  • Nationwide, 210 people from 36 states were infected with the outbreak strain of E. coli O157:H7. Illnesses started on dates ranging from March 13, 2018, to May 12, 2018.
  • As of 6/28/2018, 96 people were hospitalized, with five deaths reported. Three Wisconsin E. coli O157:H7 infections have been linked to the outbreak.
Last Revised: September 10, 2018