Clinical Report: Exploring Alternatives to Aminoglycosides for Treating Severe Tularaemia

Overview

This case series analysis presents six patients with severe pulmonary tularaemia treated with fluoroquinolones. All patients showed significant clinical improvement and resolution of pulmonary lesions following targeted therapy.

Background

Tularaemia, caused by Francisella tularensis, is a zoonotic disease that poses significant health risks, particularly in Europe. The clinical management of severe cases, especially pulmonary tularaemia, is critical due to its potential for misdiagnosis and severe complications. Traditional treatment has relied on aminoglycosides, but recent studies have explored the effectiveness of fluoroquinolones.

Data Highlights

Key Findings

• All six patients presented with acute febrile illness and respiratory symptoms.
• Laboratory tests indicated marked systemic inflammation in all cases.
• Diagnosis was confirmed through microbiological evidence of F. tularensis subsp. holarctica.
• Initial empiric broad-spectrum antimicrobials were insufficient, necessitating a switch to targeted therapy.
• Fluoroquinolone-based regimens led to clinical improvement and resolution of pulmonary infiltrates.

Clinical Implications

The findings suggest that fluoroquinolones can be a viable alternative to aminoglycosides in treating severe pulmonary tularaemia. Clinicians should consider this option, especially in cases where aminoglycosides may not be suitable.

Conclusion

This case series presents outcomes of fluoroquinolone therapy in severe pulmonary tularaemia.

Related Resources & Content

1. CDC, MMWR, 2025 -- Tularemia Antimicrobial Treatment and Prophylaxis: CDC Recommendations for Naturally Acquired Infections and Bioterrorism Response
2. Intensive Care Medicine — Addressing Study Design Issues and Proposing Further Analysis of Therapeutic Drug Monitoring for Piperacillin/Tazobactam Treatment in Sepsis Patients: Author's Response
3. Infection — Combination therapy with gentamicin linked to reduced mortality in patients suffering from invasive listeriosis: a retrospective study
4. Open Forum Infectious Diseases — Assessment of Aminoglycoside Dosing Strategies Tailored to Renal Function and In Vitro Susceptibility Testing Guidelines for Enterobacterales and Pseudomonas aeruginosa
5. Open Forum Infectious Diseases — Efficacy of Oritavancin in Managing Staphylococcus aureus Bacteremia: A Retrospective Cohort Analysis
6. Tularemia Antimicrobial Treatment and Prophylaxis: CDC Recommendations for Naturally Acquired Infections and Bioterrorism Response — United States, 2025 | MMWR
7. https://academic.oup.com/cid/article/78/Supplement_1/S15/7593851
8. Tularemie | LCI-richtlijn | LCI-richtlijnen