Stones and urinary tract infections

Area of Science:

• Urology
• Infectious Diseases
• Nephrology

Background:

• Infection stones are calculi associated with urinary tract infections (UTIs) caused by urease-producing gram-negative organisms.
• These stones are primarily composed of magnesium ammonium phosphate, carbonate apatite, and monoammonium urate, favoring formation in alkaline urine.
• Key risk factors include urinary tract obstruction, neurogenic bladder, voiding dysfunction, urinary catheter use, distal renal tubular acidosis, and medullary sponge kidney.

Purpose of the Study:

• To provide a comprehensive overview of infection stones.
• To analyze the epidemiology, composition, pathogenesis, diagnosis, treatment, and prevention strategies for infection stones.
• To differentiate between infection stones and metabolic stones complicated by UTIs.

Main Methods:

• Review of existing literature on infection stones.
• Analysis of diagnostic methods including urinalysis, urine culture, and imaging (radiopaque, staghorn, or branched stones).
• Evaluation of treatment and prevention approaches, including operative and pharmaceutical interventions.

Main Results:

• Infection stones form secondary to UTIs, playing a key role in stone pathogenesis.
• Diagnosis relies on urinalysis, urine culture, and characteristic imaging findings.
• Curative treatment necessitates complete stone fragment elimination and UTI eradication, with metaphylactic treatment essential for preventing recurrences.

Conclusions:

• Infection stones represent a distinct category of calculi arising from UTIs.
• Effective management requires a dual approach targeting both the stones and the underlying infection.
• Preventing recurrences through metaphylaxis is a critical component of long-term patient care.