Bag Sample and Culture - Pediatric Oncall

4th Pediatric Infectious Diseases Conference

ISSN 0973 - 0958

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Question
HI, my daughter who is now 2 has had or not had 3 Urinary tract infections. The first two at about age 5 months, both were confirmed by a bag sample and culture. We then saw a pediatrician and had an ultrasound. The ultrasound results were good, showed no problems and the pediatrician concluded that she did not have a uti. Now my daughter is two and once again showed some signs such as fever, vomiting, stomach pain, blood on diaper and hesitant about voiding, we had another bag sample done and the culture confirmed a uti. She was put on antibiotics followed by another urine sample by bag, again tested positive for uti. Again another round of medicine, this time interrupted by the flu, she had 3 doses of medicine when she started vomiting and complaining of stomach pain. We took her to the hospital. There they did a cbc blood test and catheterized urine sample both indicated that there was no infection. My question is, because she had 3 doses of medicine would it interfere with the results of the above tests? We have an appointment to see a specialist at the end of the month, but I do not want to put her through unneeded tests. I am confused by what I have been told. Any suggestions?
Answer
Yes, antibiotics would definitely alter the culture reports and even the CBC. A urine culture if properly collected (cleaning the genitourinary area with soap and water and catching the mid-stream of urine) and if the colony count is more than 100,000 is diagnostic of a urinary tract infection. For more information read the article on "UTI" on www.pediatriconcall.com or from the link given below: http://www.pediatriconcall.com/forpatients/CommonChild/Kidney_problems/ urinary_tractinfection.asp Back to All Questions

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