Daptomycin-beta-Lactam Combinations in a Rabbit Model of Daptomycin-Nonsusceptible Methicillin-Resistant Staphylococcus aureus Endocarditis
- Authors
- Chambers, Henry F.; Basuino, Li; Hamilton, Stephanie M.; Choo, Eun Ju; Moise, Pamela
- Issue Date
- Jul-2016
- Publisher
- American Society for Microbiology
- Keywords
- Daptomycin-beta-Lactam Combinations; Rabbit Model; Daptomycin-Nonsusceptible Methicillin-Resistant Staphylococcus aureus Endocarditis
- Citation
- Antimicrobial Agents and Chemotherapy, v.60, no.7, pp 3976 - 3979
- Pages
- 4
- Journal Title
- Antimicrobial Agents and Chemotherapy
- Volume
- 60
- Number
- 7
- Start Page
- 3976
- End Page
- 3979
- URI
- https://scholarworks.bwise.kr/sch/handle/2021.sw.sch/8991
- DOI
- 10.1128/AAC.00589-16
- ISSN
- 0066-4804
1098-6596
- Abstract
- Beta-lactams enhance the in vitro activity of daptomycin against methicillin-resistant strains of Staphylococcus aureus. Experiments were performed in a rabbit model of aortic valve endocarditis caused by methicillin-resistant daptomycin-nonsusceptible S. aureus strain CB5054 to determine if a cephalosporin, ceftriaxone, administered as a once-daily dose of 100 mg/kg of body weight, or a carbapenem, ertapenem, administered as a once-daily dose of 40 mg/kg, improved the efficacy of daptomycin, administered as a once-daily dose of 12 mg/kg. Daptomycin was ineffective alone in reducing organism densities compared to untreated controls in vegetations and spleen, but densities were 1.4 log(10) CFU/g lower in kidney. The combination of daptomycin plus ceftriaxone or daptomycin plus ertapenem reduced bacterial densities in all tissues compared to single agents, with 0.6 to 1.0 log(10) CFU/g fewer organisms in vegetations, 1.5 to 2.5 log(10) CFU/g fewer organisms in spleen, and 1.8 to 2.5 log(10) CFU/g fewer organisms in kidney, although differences were statistically significant only in spleen for daptomycin plus ceftriaxone and in kidney for daptomycin plus ertapenem. Drug exposures in rabbits were less than those achievable in humans, which may have limited the in vivo activity, particularly in vegetations.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Medicine > Department of Internal Medicine > 1. Journal Articles
![qrcode](https://api.qrserver.com/v1/create-qr-code/?size=55x55&data=https://scholarworks.bwise.kr/sch/handle/2021.sw.sch/8991)
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.