Raw dairy products have been cited has the common link between three cases of E. coli bacterial sickness in central Missouri.

Among the sick: a two-year-old.

“Each person was identified as a raw dairy consumer,” Geni Alexander, public information officer for the Columbia/Boone County Department of Public Health and Human Services, told the Columbia Tribune. Read more.

It is unknown if raw or unpasteurized dairy products are behind two other cases in central Missouri outside of Boone County.

The same E. coli bacterial strain has been found in all five cases, according to this article Tuesday in the Kansas City Star. The Missouri health department has not yet pinpointed the source of the bacteria.