Your father had neurogenic bladder secondary to spinal cord tuberculosis and had to catheterised. I am not sure if he is still catheterised. As long as catheter is in, there is colonisation with bacteria and there is no need to treat the positive culture unless patient gets symptoms of urinary tract infection in form of fever, chills and rigours. If there are no symptoms, no need to treat it even if urine culture is positive as it suggests colonisation and not infection. His albumin is low suggests that he may not be eating enough
proteins as urine loss does not seem to be the reason for low albumin. I wonder if he could be suggested to do intermittent self catheterisation rather than continuous indwelling catheter. Urinary tract infections can cause kidney damage if there is infection of the kidneys which occurs in patients with high pressure bladder or lower urinary tract obstruction which may be revealed by cystometrographic study of the bladder.