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[Q fever and endocarditis. Apropos a new case].
M Martínez-Albaladejo1, B García-López, G Alguacil-García
1Servicio de Medicina Interna, Hospital Comarcal del Noroeste de Murcia, Caravaca de la Cruz.
Anales De Medicina Interna (Madrid, Spain : 1984)
|December 1, 1992
Summary
Chronic Q fever endocarditis, often affecting heart valves, presents as culture-negative endocarditis. Treatment challenges and relapses highlight the need for effective Q fever therapies.
Area of Science:
- Infectious Diseases
- Cardiology
- Microbiology
Background:
- Chronic Q fever can manifest as culture-negative endocarditis, particularly in patients with prosthetic or damaged heart valves.
- Diagnosis and optimal antimicrobial treatment strategies for Q fever endocarditis remain areas of clinical uncertainty.
- Prosthetic valve endocarditis necessitates careful consideration of causative agents and treatment protocols.
Observation:
- A patient with a double aortic lesion presented with Q fever endocarditis.
- Initial treatment with doxycycline was successful, but the patient experienced a relapse one year later.
- The relapsed infection demonstrated resistance to doxycycline, ciprofloxacin, and rifampicin.
Findings:
- Q fever endocarditis can present with negative cultures, complicating diagnosis and treatment.
- Antimicrobial resistance can develop in chronic Q fever endocarditis, challenging treatment efficacy.
- Valve replacement may be necessary but is not always feasible in severe cases.
Implications:
- This case underscores the difficulties in managing chronic Q fever endocarditis, especially with resistant strains.
- Further research into optimal, long-term antimicrobial regimens for Q fever endocarditis is warranted.
- The case highlights the critical need for effective treatment strategies to prevent fatal cardiac complications.