Pediatric Urinary Tract Infections: Symptoms, Diagnosis, and Care - Pediatrics

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Urinary tract infection (UTI)


Hello Doctor,
My daughter had a fever of 38 degrees Celsius on the first day.
After taking a bath, she remained in a low-grade fever for two days but was active and normal otherwise.
On the fourth day, she was still uneasy, so I took her for a urine test.
The doctor mentioned that a normal value for a certain index is 5, while my daughter's index was between 8-10, which is elevated.
Therefore, the doctor prescribed antibiotics (my daughter no longer has a fever).
Is this value definitive for a urinary tract infection (UTI)? (The bacterial culture results are still pending.) Is antibiotic treatment the only option for a UTI? (She is six months old.) I feel very distressed seeing her in pain while taking the medication.
I asked the doctor if a kidney ultrasound is necessary, and the doctor replied that it is not needed unless there are recurrent infections.
Is it necessary to do one after the first infection? My daughter is uncertain if her lower body temperature, which ranges from 36.3 to 36.7 degrees Celsius, is due to the antibiotics; is this normal? I attempted to collect urine but failed the first time because the plastic dropper was not cleaned.
The second collection was successful using the same dropper; will this affect the test results? Is there anything specific I should pay attention to in her subsequent care? I change her diaper immediately after she poops and change it every two to three hours.
Thank you for your response, Doctor.
I appreciate your hard work.
🙏🙏

Hua, 30~39 year old female. Ask Date: 2023/08/23

Dr. Xiao Kaiwen reply Pediatrics


The urine test shows a leukocyte count of 8-10, which is at the upper limit of normal.
This suggests a urinary tract infection (UTI) may be present, and it is acceptable to start antibiotics while awaiting a more accurate urine culture report.
The majority of urinary tract infections are caused by bacterial infections, so antibiotic treatment is appropriate.
For recurrent urinary tract infections, it is recommended to perform a renal ultrasound; the decision regarding the first infection is subjective.
A body temperature at that level does not indicate hypothermia, and oral antibiotics would not cause hypothermia.
If the collection method does not show obvious contamination (such as feces), I believe it would not lead to significant errors in the test results, especially in routine urinalysis.
Statistics indicate that frequent diaper changes do not reduce the incidence of urinary tract infections.
It is important to note that if this infection is confirmed as a UTI and there is subsequent unexplained fever, a urine test is advised.
If a UTI is confirmed again, a renal ultrasound or even a voiding cystourethrogram may be recommended.

Reply Date: 2023/08/23

More Info


Pediatric urinary tract infections (UTIs) are a common concern among parents, especially for infants and young children. Understanding the symptoms, diagnosis, and care for UTIs is crucial for effective management and prevention of complications.

Symptoms of Pediatric UTIs
In young children, the symptoms of a UTI may not always be obvious. Common signs include:
1. Fever: Often the first sign, as seen in your daughter's case where she had a fever reaching 38 degrees Celsius.

2. Irritability or fussiness: Children may seem more irritable than usual.

3. Changes in urination: This can include frequent urination, urgency, or discomfort while urinating.

4. Abdominal or back pain: Children may complain of pain in the lower abdomen or back.

5. Poor appetite or vomiting: These can also be signs of infection.

In infants, symptoms might be even less specific, such as lethargy or poor feeding.


Diagnosis of UTIs
Diagnosis typically involves a combination of clinical evaluation and laboratory tests. In your daughter's case, the elevated urinary index (8-10) suggests a possible infection, especially when compared to the normal range (5). However, definitive diagnosis often requires urine culture to identify the specific bacteria causing the infection.


Treatment Options
Antibiotics are the standard treatment for UTIs, especially in young children. The choice of antibiotic and duration of treatment depend on the severity of the infection and the specific bacteria identified. It's important to complete the full course of antibiotics even if symptoms improve, to ensure the infection is fully cleared.

While antibiotics are the primary treatment, supportive care is also essential. This includes:
- Hydration: Encouraging your child to drink plenty of fluids can help flush out the bacteria.

- Pain management: If your child experiences discomfort, over-the-counter pain relievers may be recommended, but always consult with your pediatrician first.


Follow-Up and Monitoring
In cases of recurrent UTIs, further evaluation may be warranted. This could include imaging studies like an ultrasound to check for anatomical abnormalities in the urinary tract. Your doctor mentioned that further imaging is not necessary unless there are recurrent infections, which is a common approach.


Concerns About Antibiotic Use
It's understandable to be concerned about your child's reaction to antibiotics. If she seems to be in pain or discomfort while taking the medication, discuss this with your pediatrician. They may be able to adjust the dosage or switch to a different antibiotic that may be better tolerated.


Urine Sample Collection
Regarding urine sample collection, it's crucial to ensure that the sample is collected properly to avoid contamination. If the first attempt was unsuccessful and the dropper was not cleaned, it could potentially affect the results. Always follow your healthcare provider's instructions on how to collect a clean urine sample.


Monitoring Temperature
A lower body temperature (36.3-36.7 degrees Celsius) after starting antibiotics can occur, but it’s essential to monitor your child closely. If she exhibits any signs of distress or if her temperature drops significantly, contact your healthcare provider.


Conclusion
In summary, pediatric UTIs require careful monitoring and appropriate treatment. While antibiotics are the primary treatment, supportive care and follow-up are crucial to prevent complications. If you have ongoing concerns about your daughter's health or treatment, do not hesitate to reach out to your pediatrician for further guidance. Regular follow-ups and open communication with your healthcare provider will ensure the best care for your child.

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