Active Investigations of Multistate Foodborne Outbreaks

Last updated February 1, 2023 (updated every Wednesday)

CDC typically coordinates between 17 and 36 investigations of foodborne illnesses involving multiple states each week. The table below shows the number of active CDC investigations for Listeria monocytogenes, Salmonella, and Shiga toxin-producing E. coli. It also includes links to any current CDC outbreak notices.

Germ Number of Active Investigations CDC Outbreak Notices
Active Investigations of Possible Multistate Foodborne Outbreaks
Listeria monocytogenes 3
Salmonella 5
Shiga toxin-producing E. coli (STEC) 0
  • No active notices
Listeria monocytogenes

3 active investigations


5 active investigations

Shiga toxin-producing E. coli (STEC)

0 active investigations

  • No active notices

CDC works closely with our federal regulatory partners, FDA and USDA-FSIS, on foodborne outbreak investigations. For more information about how they work to identify and remove contaminated food from the market, visit their website:

Foodborne outbreaks are sometimes caused by other germs. For more information about these outbreaks, visit these websites: