<s>[INST] Hello I was just looking up some info on UTIs. My sister is in the hospital and they are keeping her overnight to flush her kidneys because the UTI traveled to her kidneys. She has one Kidney because in 2013 she donated one to me I had FB Gomerulonephrits.  I am worried about her and that one kidney. How serious is this? [/INST] Hi I do care for your concern. The urinary tract most of the time affects the lower part of urinary system and only in some the infection may ascend up to kidneys. First need not panic as this condition most of the time can be completely treated with the most powerful antibiotics available. I would advise Consulting your physician and get culture and sensitivity testing done and get antibiotics according to it only. In case of sensitive antibiotic the infection clears within few days. Since she had donated one of her kidney it is advisable to prevent her from further attacks. Maintain adequate hygiene and have antiseptic soap for bathing. You have not mentioned her age, as also check for blood glucose levels. Hope everything gets well soon. Hope I have answered your question, if you have more feel free to ask. Thank you. </s>