A dozen illnesses, including three hospitalizations, spanning 11 states have been reported. However, the CDC says that the scale of the outbreak is probably much larger than the number suggests.
Most of the patients the CDC interviewed say they ate raw dough or batter in the week before falling ill.
According to the CDC, flour was the only common ingredient consumed by the already hospitalized patients.
The CDC issued an investigation notice regarding the matter and, with the US Food and Drug Administration, is collecting data regarding the outbreak to determine its source.
Public health investigators have used the database PulseNet to verify that the active Salmonella infections have very similar “DNA fingerprints,” determined via Whole Gene Sequencing (WGS).
The close genetic relationship among results suggests that those infected likely became sick from eating the same food product. The CDC is working to identify that source.
Meanwhile, the CDC urges consumers to follow the standing recommendation; that raw flour products be cooked fully before consumption.
Salmonella bacteria die when cooked or baked, but consuming raw flour, including cookie dough and cake batter, is likely to cause infection. Moreover, raw flour used as play clay poses a risk.
The CDC recommends following recipe or package instructions to cook cookies, cakes, and other foods made with raw flour and using warm water and soap to wash hands, utensils, countertops and anything else that comes into contact with flour.
People should also use heat-treated flour for homemade playdough.
Symptoms of salmonella infection include diarrhea, fever, and stomach cramps that can start within hours or days of consuming the bacteria.
The CDC advises people to seek immediate medical attention if symptoms persist for more than three days.