A case of a renal abscess caused by Salmonella bareilly in a previously healthy boy

A Renal Abscess Caused by Nontyphoid Salmonella in an Immunocompetent Adult

Renal abscesses are uncommon in adults and are typically caused by gram-negative bacteria such as Escherichia coli, Proteus mirabilis, or Staphylococcus aureus. Nontyphoid Salmonella abscesses are infrequent. We discuss the case of a 27-year-old previously healthy female who developed a renal abscess due to Salmonella enterica. Abdominal computed tomography (CT) revealed a left renal abscess (size 11.6 cm × 8.2 cm) and 1.9 cm cyst in the right kidney. The urine and abscess aspirate cultures indicated the presence of gram-negative bacilli and lactose-negative Salmonella. A presumptive diagnosis of the left renal abscess was made. A urologist was consulted, and the patient was prepared for a left-sided nephrectomy. The patient's condition improved following treatment with a combination of piperacillin/tazobactam and moxifloxacin. Based on our experience, prompt recognition of nontyphoidal Salmonella as a potential cause of a renal abscess is important to prevent complications such as the extension of the abscess and the spread of the pathogen to adjacent structures.

Salmonella Mississippi: An unusual cause of renal abscess in an immunocompetent patient

Renal abscess is a rare manifestation of Salmonella infection. This usually occurs in the presence of risk factors that include immunosuppression, renal stones and urinary structural abnormality. We describe a 19-year-old male with no risk factors who developed a left renal abscess and gram-negative sepsis caused by Salmonella Mississippi. This was managed successfully with percutaneous drainage of the abscess and a prolonged course of antibiotics. To our knowledge, this is the first reported case of Salmonella Mississippi as a cause for renal abscess in an individual with no identifiable risk factors.

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Salmonella Mississippi infection is a rare cause for renal abscess.

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Patients can present with life-threatening gram-negative sepsis.

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On ultrasound and CT, Salmonella renal abscesses can appear as complex cystic lesions with septations.

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Interval imaging is recommended to ensure resolution of abscess.

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Management can include percutaneous drainage of abscess and prolonged course of antibiotics.