QUESTION: dr leslie I had utis a month ago I took doxycycline for 5 days it  cleared up.now its back my urine culture had 10000 colonies.if doxycycline does not clear up infection can I die

ANSWER: Howard

Death from a simple uti would be exceedingly unlikely. technically, any uti in a male is considered "complicated" and requires 7-14 days of treatment. If the prostate is involved it could take even longer. You should see a local urologist to make sure you get the appropriate treatment.

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QUESTION: what about urine culture with 10000 colonies is that show a very minor infection.doctor thinks its left over bacteria from last infection.chances of it entering blood stream

ANSWER: Howard

An active uti would have > 100,000 colonies. Less could still indicate an infection that has been partially treated.

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QUESTION: do most utis stay around and not spread to blood stream.do they keepmapplying anti-biotics till they find one that works


Most UTIs do not spread to the blood stream, a condition called bacteremia, and most do not stay around.  We typically do a urine culture to identify the bacteria and what it is sensitive to.  Then we give that particular antibiotic if the original treatment did not eradicate the infection. We don't just keep changing antibiotics without a plan as that often leads to resistance and yeast issues.  


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Stephen W. Leslie, MD


Questions concerning erectile dysfunction, kidney stones and prostate disorders including prostate cancer. I have a special interest in kidney stone disease prevention.


Full time practicing urologist with 30 years experience. Associate Professor of Surgery and Chief of Urology at Creighton University Medical Center. Editor in Chief of eMedicine Urology internet textbook. Author of only NIH approved book written for patients by a urologist on the subject of kidney stones "The Kidney Stones Handbook". Inventor of the "Parachute" and "Escape" kidney stone baskets and the "Calculus" stone prevention analysis computer program.

American Urological Association, Ohio State Medical Association, Sexual Medicine Society

Men's Health, Journal of Urology, Urology, Healthwatch Magazine, Emergency Medicine Monthly, eMedicine, "The Kidney Stones Handbook", and numerous articles in various newspapers. He is also the editor of the Urology Board Review by McGraw-Hill used by urologists to study for their Board Certification Examinations.

Graduate of New York Medical College with residencies completed at Metropolitan Hospital New York, Albany Medical Center and University of Wisconsin-Madison.

Awards and Honors
Thirlby Award of the American Urological Association. Rated as one the country's Best Urologists by the Independent Consumer's Research Institute

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