Hi i do care for your concern. The urinary tract most of the times affects the lower part of urinary system and only in some the infection may ascend upto kidneys. First of all need not panic as this condition most of the time can be completely treated with the most powerful antibiotics available. I would advise To consult 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.