This brings the total number of illnesses to 100 people since March, although the outbreak was not announced until June.
People infected with salmonella bacteria can show symptoms after just 12 hours, including diarrhea, fever and abdominal cramps. Pennsylvania (8), MA (7), and California (6) have the most cases, but illnesses are widespread and affecting all ages. These cases can turn deadly if not promptly treated with antibiotics.
California has six cases listed as of Thursday, according to the disease control and prevention website.
United States health officials have issued a blunt warning for people to avoid Honey Smacks, a popular breakfast cereal linked to a salmonella outbreak. No deaths have been reported.
Trump rails against Germany, demands allies double North Atlantic Treaty Organisation spending
And it comes just days before Trump sits down with Putin at the conclusion of his closely watched European trip. He suggested an accelerated timeline, saying nations would be "spending at a much faster clip".
The agency says it found salmonella in samples of Honey Smacks, which has been subject to a voluntary recall by Kellogg since mid-June.
"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.
In a post on Twitter Thursday, the CDC said Honey Smacks has been linked to 100 Salmonella infections in 33 states and warned, "Do not eat this cereal". The most recent of the illnesses was reported to the CDC on July 2, 18 days after the first recall notice. "The public is urged to report any product being offered for sale".
The CDC and the FDA are working with state and local health officials across the country to investigate the source of the contamination.