Evaluation of in vitro activity of ceftaroline, ceftobiprole and their combination with trimethoprim/sulfamethoxazole against MRSA isolates: a two center study.
{"title":"Evaluation of in vitro activity of ceftaroline, ceftobiprole and their combination with trimethoprim/sulfamethoxazole against MRSA isolates: a two center study.","authors":"Hasan Cenk Mirza, Özlem Öğüç Şanlı","doi":"10.1080/1120009X.2024.2316539","DOIUrl":null,"url":null,"abstract":"<p><p>There is an increasing need for new synergistic antimicrobial combinations against multidrug-resistant bacteria. Our objective was to evaluate the activity of ceftaroline, ceftobiprole and their combination with trimethoprim/sulfamethoxazole against methicillin-resistant <i>Staphylococcus aureus</i> (MRSA) isolates recovered at two centers in Turkey. Activities of ceftaroline and ceftobiprole were tested against 100 MRSA isolates using gradient diffusion method. Activities of ceftaroline and ceftobiprole in combination with trimethoprim/sulfamethoxazole against 20 selected isolates (including all isolates that were non-susceptible to ceftaroline or ceftobiprole, and randomly selected isolates) were investigated using MIC:MIC ratio method. Antimicrobial interactions were interpreted using the fractional inhibitory concentration (FIC) index. The MIC<sub>50</sub>/MIC<sub>90</sub> values for ceftaroline and ceftobiprole were 0.75/1 and 1/1.5 mg/L, respectively. Ceftaroline and ceftobiprole susceptibility rates among 100 MRSA isolates were 94% and 96%, respectively. Ceftaroline, ceftobiprole and trimethoprim/sulfamethoxazole MICs of isolates were not increased when ceftaroline or ceftobiprole was combined with trimethoprim/sulfamethoxazole. Ceftobiprole- trimethoprim/sulfamethoxazole combination demonstrated additivity against 35%, whereas ceftaroline- trimethoprim/sulfamethoxazole combination demonstrated additivity against 10% of 20 MRSA isolates. The remaining interactions for MRSA isolates were indifference. Three (75%) of four ceftobiprole-resistant isolates became susceptible to ceftobiprole after adding trimethoprim/sulfamethoxazole. None of the ceftaroline non-susceptible isolates became susceptible to ceftaroline after adding trimethoprim/sulfamethoxazole. Ceftobiprole- trimethoprim/sulfamethoxazole combination may be a better treatment option than ceftaroline- trimethoprim/sulfamethoxazole combination for MRSA infections. Clinical studies are needed to confirm the results of our <i>in vitro</i> study.</p>","PeriodicalId":15338,"journal":{"name":"Journal of Chemotherapy","volume":" ","pages":"457-464"},"PeriodicalIF":1.9000,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Chemotherapy","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.1080/1120009X.2024.2316539","RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2024/2/13 0:00:00","PubModel":"Epub","JCR":"Q3","JCRName":"INFECTIOUS DISEASES","Score":null,"Total":0}
引用次数: 0
Abstract
There is an increasing need for new synergistic antimicrobial combinations against multidrug-resistant bacteria. Our objective was to evaluate the activity of ceftaroline, ceftobiprole and their combination with trimethoprim/sulfamethoxazole against methicillin-resistant Staphylococcus aureus (MRSA) isolates recovered at two centers in Turkey. Activities of ceftaroline and ceftobiprole were tested against 100 MRSA isolates using gradient diffusion method. Activities of ceftaroline and ceftobiprole in combination with trimethoprim/sulfamethoxazole against 20 selected isolates (including all isolates that were non-susceptible to ceftaroline or ceftobiprole, and randomly selected isolates) were investigated using MIC:MIC ratio method. Antimicrobial interactions were interpreted using the fractional inhibitory concentration (FIC) index. The MIC50/MIC90 values for ceftaroline and ceftobiprole were 0.75/1 and 1/1.5 mg/L, respectively. Ceftaroline and ceftobiprole susceptibility rates among 100 MRSA isolates were 94% and 96%, respectively. Ceftaroline, ceftobiprole and trimethoprim/sulfamethoxazole MICs of isolates were not increased when ceftaroline or ceftobiprole was combined with trimethoprim/sulfamethoxazole. Ceftobiprole- trimethoprim/sulfamethoxazole combination demonstrated additivity against 35%, whereas ceftaroline- trimethoprim/sulfamethoxazole combination demonstrated additivity against 10% of 20 MRSA isolates. The remaining interactions for MRSA isolates were indifference. Three (75%) of four ceftobiprole-resistant isolates became susceptible to ceftobiprole after adding trimethoprim/sulfamethoxazole. None of the ceftaroline non-susceptible isolates became susceptible to ceftaroline after adding trimethoprim/sulfamethoxazole. Ceftobiprole- trimethoprim/sulfamethoxazole combination may be a better treatment option than ceftaroline- trimethoprim/sulfamethoxazole combination for MRSA infections. Clinical studies are needed to confirm the results of our in vitro study.
期刊介绍：
The Journal of Chemotherapy is an international multidisciplinary journal committed to the rapid publication of high quality, peer-reviewed, original research on all aspects of antimicrobial and antitumor chemotherapy.
The Journal publishes original experimental and clinical research articles, state-of-the-art reviews, brief communications and letters on all aspects of chemotherapy, providing coverage of the pathogenesis, diagnosis, treatment, and control of infection, as well as the use of anticancer and immunomodulating drugs.
Specific areas of focus include, but are not limited to:
· Antibacterial, antiviral, antifungal, antiparasitic, and antiprotozoal agents;
· Anticancer classical and targeted chemotherapeutic agents, biological agents, hormonal drugs, immunomodulatory drugs, cell therapy and gene therapy;
· Pharmacokinetic and pharmacodynamic properties of antimicrobial and anticancer agents;
· The efficacy, safety and toxicology profiles of antimicrobial and anticancer drugs;
· Drug interactions in single or combined applications;
· Drug resistance to antimicrobial and anticancer drugs;
· Research and development of novel antimicrobial and anticancer drugs, including preclinical, translational and clinical research;
· Biomarkers of sensitivity and/or resistance for antimicrobial and anticancer drugs;
· Pharmacogenetics and pharmacogenomics;
· Precision medicine in infectious disease therapy and in cancer therapy;
· Pharmacoeconomics of antimicrobial and anticancer therapies and the implications to patients, health services, and the pharmaceutical industry.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
