What can cause a kidney stone to get infected?

Infected stone?: Your urine is filtered in the kidneys and comes down into your bladder through a ureter, one from each kidney. Kidney stones (ks) cannot get infected but a risk of ks is a kidney infection, which can lead to sepsis (s). S is the body's often deadly response to infection or injury. S affects millions and requires early suspicion and rapid treatment. Obstruction of the ureter is how ks can cause s.