ADPKD with Kidney Cyst Infection and Fever — Next Step When Antibiotic Therapy Has Not Resolved Fever

This protocol addresses adults with autosomal dominant polycystic kidney disease (ADPKD) who have a confirmed or suspected kidney cyst infection but whose fever has failed to resolve after a full initial course of antibiotic therapy.

Clinical Scenario

Fever >38 °C

People with ADPKD who present with fever, acute abdominal or flank pain, and elevated white blood cell count and/or C-reactive protein (CRP) should be evaluated for kidney cyst infection. The presence of fever is a key finding driving both the initial work-up and subsequent escalation decisions.

Previous Treatment — Failure Condition

The standard initial approach consists of 4–6 weeks of antibiotic therapy with a lipid-soluble antibiotic — specifically a fluoroquinolone or trimethoprim-sulfamethoxazole. The goal of this course is clinical response with resolution of fever. When fever persists and clinical improvement does not occur, this regimen is considered to have failed, and escalation to the next management step is indicated.

Next-Step Approach

When antibiotic therapy alone does not produce clinical improvement, a targeted intervention directed at the infected cyst may be required. The complete protocol specifies the approach, selection criteria, and the full management algorithm.

Treatment goal: Clinical response with resolution of fever.

Instant Access to Structured Evidence-Based Regimens

References

DOI: 10.1016/j.kint.2024.07.010

People with ADPKD who present with fever, acute abdominal or flank pain, and increased white blood cells and/or C-reactive protein (CRP) should be worked up for kidney cyst infection (Figure 16).

Occasionally, drainage of a putatively infected cyst may be needed in the absence of clinical improvement.

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