Another E. coli outbreak has hit Middle Tennessee, sending more kids to the hospital, according to WTVF-TV Nashville.

Doctors were treating six new children Tuesday night, and there is concern more kids will get sick from the bacterial infection. Two of the patients are suffering from kidney failure. The rest are still recovering.

Unlike the E. coli outbreak in Macon County weeks ago, these six kids were not infected with E. coli from one spot, but rather were from all over central Tennessee. Doctors worry there could be even more cases to come, because E. coli is spread so easily between humans.

E. coli infection can come from under-cooked beef but also from swimming in streams, lakes, and drinking well water that cows may have contaminated. With the new cases, state health investigators began looking into those possibilities.