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Published on: August 30, 2018
Teicoplanin therapy for MRSA bacteraemia: a retrospective study emphasizing the importance of maintenance dosing in
Chen-Hsiang Lee1, Ching-Yen Tsai2, Chia-Chin Li3
1Division of Infectious Diseases, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan Chang Gung University College of Medicine, Kaohsiung, Taiwan.
Objectives:
To study the relationship between teicoplanin maintenance dosing and clinical outcomes in adults with MRSA bacteraemia.
Methods:
MRSA bacteraemic patients who received three teicoplanin loading doses (6 mg/kg/12 h) followed by maintenance doses of 6 mg/kg/24 h (Group 1) or 6 mg/kg/12 h (Group 2) were retrospectively analysed. Evaluated on day 7, an unfavourable early clinical response referred to the presence of septic shock, persistent fever, persistent leucocytosis and/or persistent bacteraemia. Assessed at completion of teicoplanin therapy, an unfavourable final clinical response referred to clinical treatment failure.
Results:
Compared with those in Group 1 (n = 122), patients in Group 2 (n = 82) had significantly higher rates of favourable early clinical response (P = 0.040) and final clinical response (P < 0.001) and a lower bloodstream-infection-related mortality rate (P = 0.018). Based on estimated ORs for favourable final clinical response in multivariate analysis, endocarditis (P < 0.001; OR 0.109, 95% CI 0.032-0.368), pneumonia (P < 0.001; OR 0.172, 95% CI 0.069-0.433), ICU admission (P < 0.001; OR 0.132, 95% CI 0.054-0.325) and high Pittsburgh bacteraemia score (P = 0.042; OR 0.187, 95% CI 0.021-0.457) were each a risk factor for an unfavourable final clinical response. Higher teicoplanin maintenance dosing contributed to a favourable final clinical response (P < 0.001; OR 8.800, 95% CI 3.602-21.502). Significantly higher favourable final clinical response rates were also found in patients with endocarditis (P = 0.007) and pneumonia (P < 0.001) in Group 2 compared with their counterparts in Group 1.
Conclusions:
These data highlight the importance of higher teicoplanin maintenance dosing, especially for severe infections due to MRSA.
Insights
Higher teicoplanin maintenance doses improved clinical outcomes and reduced mortality in adults with methicillin-resistant Staphylococcus aureus (MRSA) bacteraemia. This suggests optimal dosing is crucial for treating severe MRSA infections.
Area of Science:
- Infectious Diseases
- Pharmacology
- Clinical Medicine
Background:
- Methicillin-resistant Staphylococcus aureus (MRSA) bacteraemia poses a significant clinical challenge.
- Teicoplanin is a key antibiotic for treating MRSA infections.
- Optimizing teicoplanin dosing is essential for effective treatment outcomes.
Purpose of the Study:
- To investigate the association between teicoplanin maintenance dosing strategies and clinical outcomes in adult patients with MRSA bacteraemia.
- To determine if higher maintenance doses of teicoplanin improve treatment success rates.
- To identify factors influencing clinical response in MRSA bacteraemia.
Main Methods:
- Retrospective analysis of MRSA bacteraemic patients receiving standard or higher teicoplanin maintenance doses (6 mg/kg/24 h vs. 6 mg/kg/12 h).
- Evaluation of early clinical response based on septic shock, fever, leucocytosis, and bacteraemia persistence at day 7.
- Assessment of final clinical response, defined as clinical treatment failure at the completion of therapy.
Main Results:
- Patients receiving higher teicoplanin maintenance doses (6 mg/kg/12 h) showed significantly higher rates of favorable early and final clinical response.
- Higher dosing was associated with a lower bloodstream-infection-related mortality rate.
- Multivariate analysis identified endocarditis, pneumonia, ICU admission, and high Pittsburgh bacteraemia score as risk factors for unfavorable response, while higher teicoplanin dosing was a significant predictor of favorable response.
Conclusions:
- Higher teicoplanin maintenance dosing is strongly associated with improved clinical outcomes in MRSA bacteraemia.
- These findings underscore the importance of optimizing teicoplanin dosage, particularly for severe MRSA infections.
- The study supports the use of more intensive teicoplanin regimens in specific patient populations and infection types.
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