Urinary Tract Infection with Salmonella spp. Associated with Intestinal Carriage of Shigella sonnei
Abstract
Introduction: Urinary tract infections (UTIs) caused by Salmonella spp. are rare, accounting for less than 1% of bacterial UTIs. They usually occur in patients with underlying urological abnormalities or comorbidities. The association with concomitant intestinal carriage of Shigella sonnei has been exceptionally reported. Methods: We report the case of a 58-year-old male patient followed for benign prostatic hyperplasia complicated by bilateral ureterohydronephrosis and recurrent UTIs. Two urine cultures and a stool culture were performed. Cultures were processed on standard and selective media, with identification and antimicrobial susceptibility testing carried out using biochemical methods and the automated VITEK 2 system. Results: Urine cultures yielded a non-typhoidal Salmonella spp. isolate, confirmed with a high level of confidence. The strain was susceptible to beta-lactams, fluoroquinolones, and carbapenems, but resistant to aminoglycosides. Stool culture revealed asymptomatic intestinal carriage of Shigella sonnei, susceptible to most antibiotics except trimethoprim-sulfamethoxazole. Conclusion: This case highlights a rare association between Salmonella UTI and intestinal carriage of Shigella sonnei and emphasizes the importance of extended microbiological investigations and antimicrobial resistance surveillance.
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