My daughter is 15 months old and has a history of one UTI prior to 12 months of age. She had an ultrasound after the UTI but no VCUG. Twice since then she has developed fevers and had her urine tested both by dipstick and by microscopy. In both cases she tested positive for leukocytes but negative for nitrites, RBC and no bacteria were found. The dipstick test for leukocytes was +++, I m not sure what the numbers from the microscopy were. Her paediatrician said that the white blood cells were probably there from an infection elsewhere in the body (she did develop a cold). I am still a little concerned however as I thought this level of leukocytes in the urine was abnormal, and read that leukocytes can also indicate inflammation. Is there another possible problem here (another kind of inflammation?) or is UTI the only possible concern?