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

Store bought vegetable tray

  • DHS is working with local health departments throughout the state to investigate an outbreak of cyclosporiasis.
    • As of July 12, 2018, at 8 a.m., 223 laboratory-confirmed cases of cyclosporiasis have been reported in Wisconsin this year.
    • During 2017, 23 laboratory-confirmed cases were reported in Wisconsin.
  • Most of the 2018 cases have been reported since May 29, 2018. Public health staff attempt to interview all people with a Cyclospora infection. Interviews with recently reported patients may not yet be completed.
    • Of people with completed interviews, 164 of 188 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.
  • 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:

Updated July 12, 2018

Salmonellosis Linked to Cut Melons

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:

Updated June 19, 2018

Salmonellosis Linked to Kellogg's Honey Smacks Cereal

Bowl of dry breakfast cereal

  • DHS, the Wisconsin Department of Agriculture, Trade and Consumer Protection (DATCP), and local health departments are working with the U.S. Food and Drug Administration (FDA) and the Centers for Disease Control and Prevention (CDC) to investigate a multistate outbreak of Salmonella Mbandaka infections linked to the consumption of Kellogg’s Honey Smacks cereal.
  • To date, there has been one confirmed case of Salmonella Mbandaka infection in Wisconsin linked to this outbreak and a total of 73 confirmed cases nationwide in 31 states.
  • You should not eat any Kellogg’s Honey Smacks cereal in any size package. If you have this product in your home, you should throw it away or return it to the place of purchase for a refund. If you store cereal in a container without the packaging and do not remember the brand or type, throw it away. You should thoroughly wash the container with warm, soapy water before using it again.
  • Kellogg’s voluntarily recalled the Honey Smacks cereal on June 14, 2018. Retailers should not sell or serve recalled cereal.
  • Additional information can be found on the following websites:

Updated June 19, 2018

Synthetic Cannabinoids (K2, Spice)

Image of Synthetic Cannabinoids fact sheet "K2, Spice, Black Mamba, Fake Weed, Green Giant"

Updated June 26, 2018

E. coli O157:H7 Linked to Romaine Lettuce - Final Update

  • 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.
  • For additional information on this outbreak, please visit the CDC website.

Updated June 28, 2018

Last Revised: July 13, 2018