COMPARATIVE STUDY
JOURNAL ARTICLE
MULTICENTER STUDY
RANDOMIZED CONTROLLED TRIAL
REVIEW

Review of ceftaroline fosamil microbiology: integrated FOCUS studies

Ian A Critchley, Paul B Eckburg, Alena Jandourek, Donald Biek, H David Friedland, Dirk A Thye
Journal of Antimicrobial Chemotherapy 2011, 66: iii45-51
21482569
Ceftaroline fosamil, the prodrug form of ceftaroline, is a novel broad-spectrum parenteral cephalosporin that exhibits antibacterial activity against typical respiratory pathogens such as Streptococcus pneumoniae, Haemophilus influenzae, Staphylococcus aureus and common Gram-negative pathogens. In particular, ceftaroline has activity against resistant Gram-positive cocci, including penicillin- and multidrug-resistant S. pneumoniae, as well as methicillin-resistant S. aureus. The activity of ceftaroline against these phenotypes is attributed to its ability to bind to modified penicillin-binding proteins with high affinity when compared with other β-lactams. The activity of ceftaroline is not compromised by the ability of H. influenzae to produce β-lactamase. Ceftaroline fosamil was compared with ceftriaxone for safety and efficacy in two randomized, double-blinded, controlled Phase III clinical trials for the treatment of community-acquired pneumonia (CAP). Microbiological assessments at baseline included respiratory specimen cultures, blood cultures, urinary antigen testing and atypical pathogen serology testing. By-subject and by-pathogen microbiological outcomes were assessed in the microbiologically evaluable population at the test-of-cure visit. The favourable microbiological response rates by subject for ceftaroline were 87.0% compared with 81.0% for ceftriaxone. The by-pathogen microbiological response rates of ceftaroline and ceftriaxone were 87.3% and 72.9% for S. pneumoniae, 83.3% and 85.0% for H. influenzae and 76.0% and 70.4% for S. aureus, respectively. Key baseline pathogens such as S. pneumoniae, H. influenzae and methicillin-susceptible S. aureus were susceptible to ceftaroline, with MIC(90)s of 0.03, 0.03 and 0.25 mg/L, respectively, supporting its utility as a promising new agent for treatment of CAP.

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