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CDC Investigation Announcement regarding Salmonella Typhimurium infections linked to exposure to clinical and teaching microbiology laboratories

CDC and public health officials in several states have identified a multistate outbreak of Salmonella Typhimurium infections linked to various clinical, commercial, and college and university teaching microbiology laboratories.


  • Twenty-four sick people were reported from 16 states between March 17, 2017 and June 22, 2017.
  • Six people were hospitalized. No deaths were reported.
  • This strain of Salmonella has previously been associated with infections from microbiology laboratory exposure. It is a common strain used in microbiology laboratories. The strain did not originate from one source.
  • This outbreak is a reminder that bacteria used in microbiology laboratories can sicken people who work in labs. Others who live in their households can also get sick, even if the household members never visited the laboratory.

For more information on working with Salmonella and other similar human bacteria, see:


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