Relationship Between Diabetes Mellitus and Urinary Tract Infections: Pathogenesis, Risk Factors, and Management Strategies

Abstract

Background: Diabetes mellitus is a chronic metabolic disorder characterized by persistent hyperglycemia, insulin resistance, and progressive β-cell dysfunction. In addition to its metabolic consequences, diabetes substantially increases susceptibility to urinary tract infections (UTIs) through multiple mechanisms, including impaired immune function, autonomic bladder dysfunction, and enhanced bacterial colonization of the urinary tract. The increasing prevalence of multidrug-resistant (MDR) uropathogens further complicates the management of UTIs in diabetic patients. Objective: This review summarizes current evidence regarding the relationship between diabetes mellitus and urinary tract infections, with particular emphasis on disease pathogenesis, major risk factors, clinical complications, diagnostic considerations, and contemporary management strategies. Main Findings: Hyperglycemia promotes glycosuria, immune dysfunction, and bladder dysfunction, thereby facilitating bacterial growth and recurrent UTIs. Individuals with diabetes are at increased risk of complicated infections, including pyelonephritis, renal abscesses, and urosepsis. Appropriate glycemic control, culture-guided antimicrobial therapy, optimization of bladder function, and lifestyle modifications remain the cornerstone of management. Emerging therapeutic approaches, including probiotics, stem cell–based therapies, and advanced glucose-lowering agents, may provide additional benefits in selected patients. Conclusion: Effective prevention and management of UTIs in patients with diabetes require an integrated approach combining optimal metabolic control, early diagnosis, appropriate antimicrobial therapy, and individualized preventive strategies. Continued research into novel therapeutic interventions and antimicrobial resistance is essential to improve clinical outcomes and reduce the long-term burden of urinary tract infections in diabetic populations.