In vitro antimicrobial activity of daptomycin alone and in adjunction with either amoxicillin, cefotaxime or rifampicin against the main pathogens responsible for bacterial meningitis in adults
| Autor: | Lucie Amoureux, Emmanuelle Varon, Delphine Croisier, Sandrine Albac, Pascal Chavanet, Catherine Neuwirth, Nelson Anzala, Delphine Labrousse, Julien Bador, Thomas Maldiney, Dorian Bonnot, Angélique Chapuis |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
0301 basic medicine
Microbiology (medical) Cefotaxime medicine.drug_class 030106 microbiology Immunology Antibiotics Bacterial meningitis Antimicrobial association Fractional inhibitory concentration medicine.disease_cause Microbiology Meningitis Bacterial 03 medical and health sciences Minimum inhibitory concentration 0302 clinical medicine Daptomycin medicine polycyclic compounds Immunology and Allergy Humans 030212 general & internal medicine business.industry Neisseria meningitidis Amoxicillin bacterial infections and mycoses Antimicrobial QR1-502 Anti-Bacterial Agents Time–kill kinetics Rifampin business Rifampicin medicine.drug |
| Zdroj: | Journal of Global Antimicrobial Resistance, Vol 25, Iss, Pp 193-198 (2021) |
| ISSN: | 2213-7165 |
| Popis: | Objectives: As daptomycin adjunction is currently under clinical evaluation in the multicentre phase II AddaMAP study to improve the prognosis of pneumococcal meningitis, the present work aimed at evaluating the in vitro antimicrobial activity of daptomycin-based combinations against some of the most frequent species responsible for bacterial meningitis. Methods: Clinically relevant strains of Streptococcus pneumoniae, Listeria monocytogenes, Haemophilus influenzae and Neisseria meningitidis were obtained from National Reference Centers. The antimicrobial activity of amoxicillin, cefotaxime and rifampicin, either alone or in association with daptomycin, was explored through the determination of minimum inhibitory concentration (MIC) and fractional inhibitory concentration index (FICI) as well as time–kill assay (TKA) using the broth microdilution method. Results: All species taken together, the adjunction of daptomycin had no deleterious impact on the antimicrobial activity of amoxicillin, cefotaxime or rifampicin in vitro. Regarding Gram-positive bacteria, FICI and TKA analysis confirmed a global improvement of growth inhibition and bactericidal activity due to the adjunction of daptomycin. The synergistic effect prevailed for L. monocytogenes as demonstrated by FICI mainly 50%. In addition, daptomycin-based associations did not modify the activity of β-lactam antibiotics or rifampicin against Gram-negative bacteria, notably N. meningitidis. Conclusion: These results bring comforting evidence towards the clinical potential of daptomycin adjunction in the treatment of bacterial meningitis, which supports the ongoing AddaMAP clinical trial. |
| Databáze: | OpenAIRE |
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