![]() WGS analysis of bacteria from two food samples and nine people’s samples did not predict any antibiotic resistance. Based on their purchase locations and dates, FDA identified the common supplier of frozen precooked shrimp was Avanti Frozen Foods. ![]() WGS showed that the Salmonella from the shrimp are closely related to bacteria from sick people.įDA conducted a traceback investigation using purchase records from locations where six sick people bought shrimp. Using the PulseNet system, investigators identified several people that are part of this outbreak by WGS. This outbreak was first detected by FDA when a sample of Avanti Frozen Foods shrimp collected for testing at import was found to be contaminated with Salmonella Weltevreden. DNA fingerprinting is performed on bacteria using a method called whole genome sequencing (WGS). CDC PulseNet manages a national database of DNA fingerprints of bacteria that cause foodborne illnesses. ![]() Public health investigators used the PulseNet system to identify illnesses that were part of this outbreak. Of the seven people interviewed, all reported eating shrimp before getting sick. State and local public health officials interviewed people about the foods they ate in the week before they got sick. Of six people with information available, three were hospitalized. Sick people ranged in age from 30 to 80 years, with a median age of 60 years, and 56% were female. Illnesses started on dates ranging from February 26, 2021, to J(see timeline). Nine people infected with the outbreak strain of Salmonella Weltevreden were reported from four states (see map). Food and Drug Administration (FDA) began collecting different types of data to investigate a multistate outbreak of Salmonella Weltevreden infections.Įpidemiologic, laboratory, and traceback data showed that frozen cooked shrimp supplied by Avanti Frozen Foods was contaminated with Salmonella and made people sick.Īs of September 21, 2021, this outbreak is over. In May 2021, CDC, public health and regulatory officials in several states, and the U.S.
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