The CDC says at least 30 of the people infected in the outbreak have been hospitalized.
Salmonella infections can cause illness, or death in rare cases.
Most people recover without treatment, however.
Salmonella can also travel from the intestines to the bloodstream and ultimately the rest of the body. These cases can turn deadly if not promptly treated with antibiotics. No deaths have been reported in the latest outbreak.
"Laboratory testing identified the outbreak strain of Salmonella in unopened and opened boxes of Honey Smacks cereal collected from retail locations and from ill people's homes", the new report stated.
The Centers for Disease Control is warning customers not to eat Kellogg's Honey Smacks cereal after the breakfast was linked to 100 salmonella infections nationwide.
Kellogg in June recalled an estimated 1.3 million cases of its Honey Smacks cereal from more than 30 USA states due to the potential for Salmonella contamination. Though the official recall notice covers boxes with a date from June 2018 to June 2019, federal health officials now say consumers shouldn't bother checking dates or sizes and just avoid all boxes.
"The FDA has become aware that recalled Kellogg's Honey Smacks cereal are still being offered for sale", the agency said in a statement. "Additionally, the public is urged to report any product being offered for sale to the FDA Consumer Complaint Coordinator in their region". The source of the outbreak remains under investigation.