Thus far, neither the CDC nor the FDA has implicated a specific food item.

According to the CDC, on September 2, 2021, CDC identified an outbreak of 20 Salmonella Oranienburg infections. Since then, the outbreak has grown rapidly.
As of September 21, 2021, 284 people infected with the outbreak strain of Salmonella Oranienburg have
Background
In July 2021, CDC, public health and regulatory officials in several states, and the U.S. Department of Agriculture’s Food Safety and Inspection Service (USDA-FSIS) began collecting different types of data to investigate a multistate outbreak of Listeria monocytogenes infections.
The McHenry County Department of Health (MCDH) wants to remind those who recently ate at El Sombrero in Fox River Grove, and are in sensitive occupations, to exclude themselves from work and seek medical evaluation if experiencing any symptoms of gastrointestinal illness. El Sombrero has voluntarily closed and continues to cooperate with McHenry County health