How Do Babies Get Urinary Tract Infection. Coli is responsible for up to 80% of utis. The bacteria that cause a uti can get into the urinary tract at the opening of the urethra.

The two types of utis most likely to affect children are bladder infections and. A urinary tract infection is inflammation of part of the system that takes urine out of the body. A urine test is the only way to know for certain whether your child has a bladder or kidney infection.