In 2021 CDC, public health and regulatory officials in several states, and the U.S. Food and Drug Administration (FDA) investigated a multistate outbreak of Salmonella Thompson infections. Epidemiologic, traceback, and laboratory data showed that seafood distributed by Northeast Seafood Products of Denver, Colorado, made people sick.

A total of 115 people infected with the outbreak strain of Salmonella Thompson were reported from 15 states. Most of the sick people were either Colorado residents (93 people) or reported traveling to Colorado in the week before they got sick (14 people). Illnesses started on dates ranging from May 11, 2021, to October 16, 2021. Sick people ranged in age from less than 1 to 85 years, with a median age of 39, and 53% were female. Of 111 people with information available, 20 were hospitalized and no deaths were reported.

FDA inspected the Northeast Seafood Products facility and collected environmental samples for testing. On October 7, 2021, laboratory results identified the outbreak strain in the environmental samples. On October 8, 2021, Northeast Seafood Products recalled several types of seafood processed at their facility.

The outbreak was declared over on December 6, 2021.