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Published on: October 18, 2019
[Microbial associations defecting in children with chronic pyelonephritis]
Insights
Bacterial and viral infections frequently co-occur in children with obstructive pyelonephritis. This mixed infection highlights the need for comprehensive diagnostic and treatment strategies for pediatric kidney infections.
Area of Science:
- Pediatric Nephrology
- Microbiology
- Virology
Context:
- Pyelonephritis is a significant kidney infection in children.
- Obstructive pyelonephritis presents unique diagnostic and therapeutic challenges.
- Understanding microbial and viral co-infections is crucial for effective management.
Purpose:
- To investigate the detection rates of various bacteria and viruses in children with pyelonephritis.
- To identify common microbial and viral associations in pediatric pyelonephritis.
- To compare infection patterns in children with chronic secondary pyelonephritis versus those undergoing nephrectomy.
Summary:
- A study of 274 children (5-10 years) with pyelonephritis revealed high rates of bacterial-viral co-infection.
- In chronic secondary pyelonephritis, mixed bacterial infections (e.g., staphylococci, Escherichia, Mycoplasma) and herpesviruses/papillomaviruses were common.
- In the nephrectomy group, bacterial and viral presence varied between pre-operative urine, operative urine, and renal biopsy samples, with viruses detected in biopsies even when absent in operative urine.
Impact:
- Findings underscore the prevalence of bacterial-viral mixed infections in pediatric obstructive pyelonephritis.
- Results emphasize the importance of considering both bacterial and viral pathogens in diagnosis and treatment.
- This research informs clinical practice for managing complex pediatric kidney infections.
Aim:
To study rate of detection of bacteria and viruses from different taxonomic groups and their associations in children with pyelonephritis.
Materials And Methods:
Two hundred seventy-four patients aged 5-10 years divided on two groups were studied: 1st group--240 children with chronic secondary pyelonephritis, 2nd group--children with nephrectomy due to terminal stage of renal obstructive process. Qualitative and quantitative composition of bacterial flora in urine and renal biopsy samples was studied by bacteriological methods as well as presence of viruses (HSVI, HSVII, CMV, EBV, HPV) by means of PCR.
Results:
In group 1, 72.2% of children had bacterial mixed infection with associations of coagulase-negative staphylococci, Escherichia, peptococci, and Mycoplasma. Herpesviruses and human papillomaviruses were detected in 50.0% of cases. In group 2, bacterial flora was isolated from preoperative urine in diagnostically-significant titer in 91.2% of cases, whereas in urine obtained from the same patients during operation the microorganisms were detected in 38.2% of cases with predominance of Mycoplasma and Ureaplasma. Bacteriological tests of renal biopsy samples yielded bacteria in 29.5% of cases. Studied viruses were detected in preoperative and intraoperative urine as well as in renal biopsy samples in 52.9%, 44.1%, and 58.8% of cases, respectively. In 32.4% of patients viruses were detected in biopsy samples but not in intraoperative renal pelvis' urine. There was no difference in HPV and CMV detection rate in the nephrectomy group.
Conclusion:
Bacterial-viral mixed infection is encountered in children with obstructive pyelonephritis and this should be taken into account during diagnostics and treatment of this condition.
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