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Endocarditis caused by Arcanobacterium haemolyticum

J I Alós1, C Barros, J L Gómez-Garcés

  • 1Servicio de Microbiología, Hospital de Móstoles, Madrid, Spain.

European Journal of Clinical Microbiology & Infectious Diseases : Official Publication of the European Society of Clinical Microbiology
|December 1, 1995
PubMed
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This case study highlights a rare instance of endocarditis caused by Arcanobacterium haemolyticum in an HIV-positive individual. Vancomycin plus gentamicin proved effective after initial ampicillin treatment failed, demonstrating successful management of this uncommon infection.

Area of Science:

  • Infectious Diseases
  • Bacteriology
  • Cardiology

Background:

  • Endocarditis is a serious infection affecting heart valves.
  • Arcanobacterium haemolyticum is an uncommon cause of endocarditis, particularly in immunocompromised patients.
  • Human immunodeficiency virus (HIV) infection increases susceptibility to various infections, including endocarditis.

Observation:

  • A 33-year-old male with a history of intravenous drug abuse and HIV developed endocarditis.
  • Initial empirical treatment with ampicillin and gentamicin showed limited clinical improvement.
  • Antibiotic susceptibility testing revealed specific resistance patterns influencing treatment decisions.

Findings:

  • Therapy was switched to vancomycin plus gentamicin based on antibiotic susceptibility results.

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  • The patient demonstrated significant clinical and radiological improvement following the change in antibiotic regimen.
  • A 30-day antibiotic course resulted in no relapse during a 14-month follow-up period.

    • Implications:

    • This case underscores the importance of tailored antibiotic therapy for rare pathogens like Arcanobacterium haemolyticum.
    • Effective management of A. haemolyticum endocarditis may involve vancomycin and gentamicin, especially in complex cases.
    • Further research into A. haemolyticum infections and optimal treatment strategies is warranted.