Case Study: Diagnosing and Treating a Urinary Tract Infection (UTI) in a 5-Month-Old Infant Admitted with a High Fever

When an infant runs a high fever for several days, it is crucial to look beyond a simple cold and consider the possibility of a bacterial infection, such as a urinary tract infection (UTI). Because babies only a few months old cannot communicate their symptoms, prompt diagnostic testing and immediate hospital care are vital to their safety and recovery.   Patient Profile Age/Sex: 5 months old, female (born in 2025) Admission Period: December 20 – December 27, 2025 Reason for Visit: Inpatient care required due to persistent high fever and abnormal urinalysis findings.   Diagnosis and Evaluation Process

• Comprehensive blood and urine tests were conducted immediately upon admission to pinpoint the source of the infection.
• Results confirmed elevated inflammatory markers.
• Given the high likelihood of a UTI, we promptly initiated intravenous (IV) antibiotics and fluid therapy.
• Detailed imaging, including a renal and urinary tract ultrasound, was performed to assess internal health.
• Imaging revealed a mild dilation in one kidney alongside specific structural characteristics in the urinary tract. Following these findings, we conducted further evaluations to check for underlying structural abnormalities and developed a proactive care plan tailored to prevent future recurrences. During her stay, we also thoroughly ruled out other potential inflammatory diseases associated with her systemic inflammation, providing comprehensive, parallel treatments until her condition was completely stabilized.   Treatment Progress
• The high fever completely resolved following the administration of IV antibiotics and fluids.
• The infant’s overall condition showed steady, gradual improvement.
• She maintained a stable recovery trajectory with no severe complications.
• Discharged safely once a full clinical recovery was confirmed. Post-Discharge Plan: ✔ Monitor closely for any UTI recurrence ✔ Follow-up checkups to track kidney health and development   Case Summary & Clinical Significance This case highlights our comprehensive medical approach to managing infant fevers, successfully: ✔ Diagnosing a UTI in its early stages ✔ Evaluating for underlying structural abnormalities ✔ Ruling out concurrent systemic inflammatory conditions Even when a baby’s fever seems straightforward, a systematic, step-by-step medical evaluation is absolutely essential. At Tuntun Children’s Hospital, we safely and effectively manage pediatric infectious diseases through: ✔ Advanced differential diagnostic systems for infant fevers ✔ Seamless integration of infection treatment and pediatric imaging ✔ Dedicated, long-term follow-up care designed around your child’s healthy growth