Unsolved Mystery: Salmonella

When ProPublica investigated an outbreak of a multidrug-resistant salmonella called infantis that has sickened tens of thousands of people in the US, it deployed the usual “bread and butter” interviews and public records requests.

It also rolled out a novel tool: genomic sequencing data.
 
The reporters wondered why the CDC closed the investigation in 2019 without finding a cause, even though people were still getting sick.
 
Bonanza: With the help of their colleague Irena Hwang, a former doctoral student in electrical engineering with a specialty in bioinformatics, reporters tapped a federal database that tracks data on foodborne illnesses, offering a “bonanza of bacterial detail.” 

Learn how did they did it, and what they found out. 
 
ProPublica

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