People who got sick reported eating different brands of chicken products purchased from many different locations, leading the CDC to say that the outbreak "might be widespread in the chicken industry" in a statement.
The agency said this strain "is resistant to multiple antibiotics" and has not yet been linked to one specific supplier of raw chicken.
The CDC says 21 people have been hospitalized.
The strain of the outbreak is seen in live chickens and many types of raw chicken products.
Five cases of multi-drug resistant salmonella infantis illness has reported by the Illinois Dept. of Public Health.
According to the CDC, there are four quick steps that can help keep people safe from food poisoning at home when it comes to preparing food: "clean, separate, cook and chill".
Salmonella normally causes mild upset stomach, but it can be serious in the elderly, young children and those with compromised immune systems. The CDC continues to investigate the outbreak.
Don't spread germs from raw chicken around food preparation: Don't wash raw poultry before cooking; germs can splash around your kitchen. Additional food safety tips are available here.
To prevent cross-contamination, thoroughly wash hands, counters, cutting boards, and utensils with warm, soapy water after they touch raw chicken.
The good news is that all chicken is safe to eat once it has been thoroughly cooked.
CDC does not recommend feeding raw diets to pets.
The investigation is ongoing and CDC will provide more information as it becomes available.