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Penicillin-sensitive Moraxella prosthetic endocarditis. Near disaster caused by failure to treat with penicillin
Abstract:
A patient with late prosthetic endocarditis resulting from Moraxella non-liquefaciens is reported. Correct laboratory indentification is of therapeutic importance as Moraxella is often highly sensitive to penicillin. Because of suspected penicillin sensitivity, antibiotics other than penicillin were used, but failed to control the endocarditis. Prompt response occurred when penicillin was given. Penicillin remains by far the most effective antibiotic for the treatment of endocarditis, particularly when affecting prosthetic valves, and caused by organisms sensitive to penicillin.
Insights
A patient experienced prosthetic valve endocarditis caused by Moraxella non-liquefaciens. Prompt penicillin treatment was crucial for recovery, highlighting its effectiveness against this infection.
Area of Science:
- Infectious Diseases
- Cardiology
- Microbiology
Background:
- Prosthetic valve endocarditis (PVE) is a serious complication requiring effective antimicrobial therapy.
- Moraxella non-liquefaciens is an uncommon cause of endocarditis, posing diagnostic and therapeutic challenges.
Observation:
- A case of late PVE caused by Moraxella non-liquefaciens is presented.
- Initial treatment with non-penicillin antibiotics failed to resolve the infection.
Findings:
- Accurate laboratory identification of Moraxella non-liquefaciens is critical due to its typical penicillin sensitivity.
- The patient showed a prompt positive response only after the initiation of penicillin therapy.
Implications:
- Penicillin remains the most effective antibiotic for treating endocarditis, especially prosthetic valve infections.
- This case underscores the importance of considering penicillin for Moraxella-related endocarditis despite potential initial misdiagnosis or alternative antibiotic choices.