7 yr old girl with constant bladder infections

  Alixe is 7 and since January of 1997 she has had at least 10 bladder infections. We changed her wiping habits and increased fluid intake.  We successfully treated them with Bactrim for the first several months, then the doctor placed her on preventitive Bactrim (1 tsp. per day).  That worked for a few months, then she got a bladder infection while on the Bactrim.  If she happened to miss a dose, the symptoms would show up immediatly.  We've had the VCUG, IVP and ultra sound done, and everything was normal.  In the last 2 months, she was placed on Furadantin, but it either didn't work, or she had another infection within 5 days.  Now the doctor has just prescribed Keflex for a week before going back to the Bactrim.  Is there anything he's missing?  It seems no matter what we do, she keeps being reinfected.  Or is it that the infection is never really going away?  I would appreciate any advise that I could take with me to our next appointment 5/11.  Thanks ! Juli
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Dear Juli
Thanks  for  your question.  Sure look like your questions have generated alot of interest.
First to answer your question about incompletely treated infections.  The urine culture would grow the same bacteria again and again if the infection was never treated completely.  
If the test you mentioned were performed correctly and did not miss anything  (rare), your child does not have reflux and should not be at any increased risk of kidney  infections (pyelonephritis) and its complications.   If your child has had many bouts of fever > 101 with these UTI