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Werner G, Layer F, Weber RE, Neumann B, Kresken M. Re: 'How To: ECOFFs – the why, the how and the don´ts of EUCAST epidemiological cutoff values' by Kahlmeter et al. Clin Microbiol Infect 2022; 28:1028-1029. [DOI: 10.1016/j.cmi.2022.03.024] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Accepted: 03/16/2022] [Indexed: 12/14/2022]
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Weber RE, Fuchs S, Layer F, Sommer A, Bender JK, Thürmer A, Werner G, Strommenger B. Genome-Wide Association Studies for the Detection of Genetic Variants Associated With Daptomycin and Ceftaroline Resistance in Staphylococcus aureus. Front Microbiol 2021; 12:639660. [PMID: 33658988 PMCID: PMC7917082 DOI: 10.3389/fmicb.2021.639660] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Accepted: 01/22/2021] [Indexed: 12/29/2022] Open
Abstract
Background As next generation sequencing (NGS) technologies have experienced a rapid development over the last decade, the investigation of the bacterial genetic architecture reveals a high potential to dissect causal loci of antibiotic resistance phenotypes. Although genome-wide association studies (GWAS) have been successfully applied for investigating the basis of resistance traits, complex resistance phenotypes have been omitted so far. For S. aureus this especially refers to antibiotics of last resort like daptomycin and ceftaroline. Therefore, we aimed to perform GWAS for the identification of genetic variants associated with DAP and CPT resistance in clinical S. aureus isolates. Materials/methods To conduct microbial GWAS, we selected cases and controls according to their clonal background, date of isolation, and geographical origin. Association testing was performed with PLINK and SEER analysis. By using in silico analysis, we also searched for rare genetic variants in candidate loci that have previously been described to be involved in the development of corresponding resistance phenotypes. Results GWAS revealed MprF P314L and L826F to be significantly associated with DAP resistance. These mutations were found to be homogenously distributed among clonal lineages suggesting convergent evolution. Additionally, rare and yet undescribed single nucleotide polymorphisms could be identified within mprF and putative candidate genes. Finally, we could show that each DAP resistant isolate exhibited at least one amino acid substitution within the open reading frame of mprF. Due to the presence of strong population stratification, no genetic variants could be associated with CPT resistance. However, the investigation of the staphylococcal cassette chromosome mec (SCCmec) revealed various mecA SNPs to be putatively linked with CPT resistance. Additionally, some CPT resistant isolates revealed no mecA mutations, supporting the hypothesis that further and still unknown resistance determinants are crucial for the development of CPT resistance in S. aureus. Conclusion We hereby confirmed the potential of GWAS to identify genetic variants that are associated with antibiotic resistance traits in S. aureus. However, precautions need to be taken to prevent the detection of spurious associations. In addition, the implementation of different approaches is still essential to detect multiple forms of variations and mutations that occur with a low frequency.
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Affiliation(s)
- Robert E Weber
- Department of Infectious Diseases, Robert Koch-Institute, Wernigerode, Germany.,Methodology and Research Infrastructure, Genome Sequencing, Robert Koch-Institute, Berlin, Germany
| | - Stephan Fuchs
- Methodology and Research Infrastructure, Bioinformatics, Robert Koch-Institute, Berlin, Germany
| | - Franziska Layer
- Department of Infectious Diseases, Robert Koch-Institute, Wernigerode, Germany.,Methodology and Research Infrastructure, Genome Sequencing, Robert Koch-Institute, Berlin, Germany
| | - Anna Sommer
- Department of Infectious Diseases, Robert Koch-Institute, Wernigerode, Germany.,Methodology and Research Infrastructure, Genome Sequencing, Robert Koch-Institute, Berlin, Germany
| | - Jennifer K Bender
- Department of Infectious Diseases, Robert Koch-Institute, Wernigerode, Germany.,Methodology and Research Infrastructure, Genome Sequencing, Robert Koch-Institute, Berlin, Germany
| | - Andrea Thürmer
- Methodology and Research Infrastructure, Bioinformatics, Robert Koch-Institute, Berlin, Germany
| | - Guido Werner
- Department of Infectious Diseases, Robert Koch-Institute, Wernigerode, Germany.,Methodology and Research Infrastructure, Genome Sequencing, Robert Koch-Institute, Berlin, Germany
| | - Birgit Strommenger
- Department of Infectious Diseases, Robert Koch-Institute, Wernigerode, Germany.,Methodology and Research Infrastructure, Genome Sequencing, Robert Koch-Institute, Berlin, Germany
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Varela MC, Roch M, Taglialegna A, Long SW, Saavedra MO, Rose WE, Davis JJ, Hoffman LR, Hernandez RE, Rosato RR, Rosato AE. Carbapenems drive the collateral resistance to ceftaroline in cystic fibrosis patients with MRSA. Commun Biol 2020; 3:599. [PMID: 33093601 PMCID: PMC7582194 DOI: 10.1038/s42003-020-01313-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Accepted: 07/30/2020] [Indexed: 01/14/2023] Open
Abstract
Chronic airways infection with methicillin-resistant Staphylococcus aureus (MRSA) is associated with worse respiratory disease cystic fibrosis (CF) patients. Ceftaroline is a cephalosporin that inhibits the penicillin-binding protein (PBP2a) uniquely produced by MRSA. We analyzed 335 S. aureus isolates from CF sputum samples collected at three US centers between 2015-2018. Molecular relationships demonstrated that high-level resistance of preceding isolates to carbapenems were associated with subsequent isolation of ceftaroline resistant CF MRSA. In vitro evolution experiments showed that pre-exposure of CF MRSA to meropenem with further selection with ceftaroline implied mutations in mecA and additional mutations in pbp1 and pbp2, targets of carbapenems; no effects were achieved by other β-lactams. An in vivo pneumonia mouse model showed the potential therapeutic efficacy of ceftaroline/meropenem combination against ceftaroline-resistant CF MRSA infections. Thus, the present findings highlight risk factors and potential therapeutic strategies offering an opportunity to both prevent and address antibiotic resistance in this patient population.
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Affiliation(s)
- Maria Celeste Varela
- Department of Pathology and Genomic Medicine, Center for Molecular and Translational Human Infectious Diseases Research, Houston Methodist Research Institute, Houston, TX, USA
| | - Melanie Roch
- Department of Pathology and Genomic Medicine, Center for Molecular and Translational Human Infectious Diseases Research, Houston Methodist Research Institute, Houston, TX, USA
| | - Agustina Taglialegna
- Department of Pathology and Genomic Medicine, Center for Molecular and Translational Human Infectious Diseases Research, Houston Methodist Research Institute, Houston, TX, USA
| | - Scott W Long
- Department of Pathology and Genomic Medicine, Center for Molecular and Translational Human Infectious Diseases Research, Houston Methodist Research Institute, Houston, TX, USA
| | - Matthew Ojeda Saavedra
- Department of Pathology and Genomic Medicine, Center for Molecular and Translational Human Infectious Diseases Research, Houston Methodist Research Institute, Houston, TX, USA
| | - Warren E Rose
- School of Pharmacy, University of Wisconsin-Madison, Madison, WI, USA
| | - James J Davis
- Argonne National Laboratory (DOE), Lemont, IL, USA
- Computation Institute, University of Chicago, Chicago, IL, USA
| | - Lucas R Hoffman
- Department of Pediatrics and Department of Microbiology, University of Washington, Seattle, WA, USA
- Center for Clinical and Translational Research, Seattle Children's Research Institute, Seattle, WA, USA
| | - Rafael E Hernandez
- Department of Pediatrics and Department of Microbiology, University of Washington, Seattle, WA, USA
- Center for Clinical and Translational Research, Seattle Children's Research Institute, Seattle, WA, USA
| | - Roberto R Rosato
- Houston Methodist Cancer Center, Houston Methodist Hospital, Houston, USA
| | - Adriana E Rosato
- Department of Pathology and Genomic Medicine, Center for Molecular and Translational Human Infectious Diseases Research, Houston Methodist Research Institute, Houston, TX, USA.
- Riverside University Health System-Medical Center, 26520 Cactus Avenue, Moreno Valley, CA, 92555, USA.
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4
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Hill MA, Lam AK, Reed P, Harney MC, Wilson BA, Moen EL, Wright SN, Pinho MG, Rice CV. BPEI-Induced Delocalization of PBP4 Potentiates β-Lactams against MRSA. Biochemistry 2019; 58:3813-3822. [PMID: 31429286 PMCID: PMC6941424 DOI: 10.1021/acs.biochem.9b00523] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
With its high morbidity rate and increasing resistance to treatment, methicillin-resistant Staphylococcus aureus (MRSA) is a grave concern in the medical field. In methicillin-susceptible strains, β-lactam antibiotics disable the penicillin binding proteins (PBPs) that cross-link the bacterial cell wall. However, methicillin-resistant strains have PBP2a and PBP4, which continue enzymatic activity in the presence of β-lactam antibiotics. The activity of PBP2a and PBP4 is linked to the presence of wall teichoic acid (WTA); thus, WTA has emerged as a target for antibiotic drug discovery. In this work, we disable WTA in situ using its anionic phosphodiester backbone to attract cationic branched polyethylenimine (BPEI). Data show that BPEI removes β-lactam resistance in common MRSA strains and clinical isolates. Fluorescence microscopy was used to investigate this mechanism of action. The results indicate that BPEI prevents the localization of PBP4 to the cell division septum, thereby changing the cellular morphology and inhibiting cell division. Although PBP4 is not required for septum formation, proper cell division and morphology require WTA; BPEI prevents this essential function. The combination of BPEI and β-lactams is bactericidal and synergistic. Because BPEI allows us to study the role of WTA in the cell wall without genetic mutation or altered translocation of biomolecules and/or their precursors, this approach can help revise existing paradigms regarding the role of WTA in prokaryotic biochemistry at every growth stage.
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Affiliation(s)
- Melissa A. Hill
- Department of Chemistry and Biochemistry, Stephenson Life Sciences Research Center, University of Oklahoma, 101 Stephenson Parkway, Norman, Oklahoma 73019, United States
| | - Anh K. Lam
- Department of Chemistry and Biochemistry, Stephenson Life Sciences Research Center, University of Oklahoma, 101 Stephenson Parkway, Norman, Oklahoma 73019, United States
| | - Patricia Reed
- Laboratory of Bacterial Cell Biology, Instituto de Tecnologia Química e Biologica António Xavier, Universidade NOVA de Lisboa, Av. da Repùblica, 2780-157 Oeiras, Portugal
| | - Madeline C. Harney
- Department of Chemistry and Biochemistry, Stephenson Life Sciences Research Center, University of Oklahoma, 101 Stephenson Parkway, Norman, Oklahoma 73019, United States
| | - Beatrice A. Wilson
- Department of Chemistry and Biochemistry, Stephenson Life Sciences Research Center, University of Oklahoma, 101 Stephenson Parkway, Norman, Oklahoma 73019, United States
| | - Erika L. Moen
- Department of Chemistry and Biochemistry, Stephenson Life Sciences Research Center, University of Oklahoma, 101 Stephenson Parkway, Norman, Oklahoma 73019, United States
| | - Summer N. Wright
- Department of Chemistry and Biochemistry, Stephenson Life Sciences Research Center, University of Oklahoma, 101 Stephenson Parkway, Norman, Oklahoma 73019, United States
| | - Mariana G. Pinho
- Laboratory of Bacterial Cell Biology, Instituto de Tecnologia Química e Biologica António Xavier, Universidade NOVA de Lisboa, Av. da Repùblica, 2780-157 Oeiras, Portugal
| | - Charles V. Rice
- Department of Chemistry and Biochemistry, Stephenson Life Sciences Research Center, University of Oklahoma, 101 Stephenson Parkway, Norman, Oklahoma 73019, United States
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Jamal W, Abdulkareem H, Rotimi VO. Comparative in vitro activity of ceftaroline and comparator agents against nosocomial Gram-negative and Gram-positive clinically significant bacterial isolates from patients in a teaching hospital in Kuwait. J Chemother 2018; 30:213-223. [PMID: 29466931 DOI: 10.1080/1120009x.2018.1438768] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
The objective was to test the in vitro activities of ceftaroline and comparator agents against clinical isolates of Gram-negative and Gram-positive bacteria. Isolates were identified with VITEK II. Susceptibility testing was with E test. A total of 1264 isolates were tested. Compared to other cephalosporins, ceftaroline demonstrated excellent in vitro activities (MIC90, ≤0.5 mg/L) against Escherichia coli, Salmonella spp. and Haemophilus influenzae. When matched with the comparator cephalosporins, ceftaroline demonstrated the greatest activity against methicillin-susceptible Staphylococcus aureus (MSSA), with MIC90 of 0.25 mg/L. Ceftaroline's MIC90s against both community-associated methicillin-resistant S. aureus (MRSA) and hospital-acquired MRSA were 0.5 and 1 mg/L, respectively. Major discrepancies were noted between E test and disc diffusion tests for ceftaroline only against 16 Gram-negative and 16 Gram-positive isolates. Ceftaroline demonstrated an excellent in vitro activity against the majority of clinically significant Gram-negative and Gram-positive isolates obtained from proven cases of bacterial infections.
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Affiliation(s)
- Wafaa Jamal
- a Faculty of Medicine, Department of Microbiology , Kuwait University , Jabriya , Kuwait
- b Microbiology Unit, Mubarak Al Kabir Hospital , Jabriya , Kuwait
| | | | - Vincent O Rotimi
- a Faculty of Medicine, Department of Microbiology , Kuwait University , Jabriya , Kuwait
- b Microbiology Unit, Mubarak Al Kabir Hospital , Jabriya , Kuwait
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6
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Andrey DO, François P, Manzano C, Bonetti EJ, Harbarth S, Schrenzel J, Kelley WL, Renzoni A. Antimicrobial activity of ceftaroline against methicillin-resistant Staphylococcus aureus (MRSA) isolates collected in 2013-2014 at the Geneva University Hospitals. Eur J Clin Microbiol Infect Dis 2017; 36:343-350. [PMID: 27744604 PMCID: PMC5253141 DOI: 10.1007/s10096-016-2807-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2016] [Accepted: 09/27/2016] [Indexed: 11/30/2022]
Abstract
Ceftaroline is a broad-spectrum antibiotic with activity against methicillin-resistant Staphylococcus aureus (MRSA) strains. Ceftaroline susceptibility of an MRSA set archived between 1994 and 2003 in the Geneva University Hospitals detected a high percentage (66 %) of ceftaroline resistance in clonotypes ST228 and ST247 and correlated with mutations in PBP2a. The ceftaroline mechanism of action is based on the inhibition of PBP2a; thus, the identification of PBP2a mutations of recently circulating clonotypes in our institution was investigated. We analyzed ceftaroline susceptibility in MRSA isolates (2013 and 2014) and established that resistant strains correlated with PBP2a mutations and specific clonotypes. Ninety-six MRSA strains were analyzed from independent patients and were isolated from blood cultures (23 %), deep infections (38.5 %), and superficial (skin or wound) infections (38.5 %). This sample showed a ceftaroline minimum inhibitory concentration (MIC) range between 0.25 and 2 μg/ml and disk diameters ranging from 10 to 30 mm, with a majority of strains showing diameters ≥20 mm. Based on the European Committee on Antimicrobial Susceptibility Testing (EUCAST) breakpoints, 76 % (73/96) of isolates showed susceptibility to ceftaroline. Nevertheless, we still observed 24 % (23/96) of resistant isolates (MIC = 2 μg/ml). All resistant isolates were assigned to clonotype ST228 and carried the N146K mutation in PBP2a. Only two ST228 isolates showed ceftaroline susceptibility. The decreasing percentage of ceftaroline-resistant isolates in our hospital can be explained by the decline of ST228 clonotype circulating in our hospital since 2008. We present evidence that ceftaroline is active against recent MRSA strains from our hospital; however, the presence of PBP2a variants in particular clonotypes may affect ceftaroline efficacy.
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Affiliation(s)
- D O Andrey
- Service of Infectious Diseases, Department of Medical Specialties, Geneva University Hospitals and Medical School, Geneva, Switzerland
| | - P François
- Genomic Research Laboratory, Service of Infectious Diseases, Department of Medical Specialties, Geneva University Hospitals and Medical School, Geneva, Switzerland
| | - C Manzano
- Service of Infectious Diseases, Department of Medical Specialties, Geneva University Hospitals and Medical School, Geneva, Switzerland
| | - E J Bonetti
- Genomic Research Laboratory, Service of Infectious Diseases, Department of Medical Specialties, Geneva University Hospitals and Medical School, Geneva, Switzerland
| | - S Harbarth
- Service of Infectious Diseases, Department of Medical Specialties, Geneva University Hospitals and Medical School, Geneva, Switzerland
- Infection Control Program, Geneva University Hospitals and Medical School, Geneva, Switzerland
| | - J Schrenzel
- Service of Infectious Diseases, Department of Medical Specialties, Geneva University Hospitals and Medical School, Geneva, Switzerland
- Genomic Research Laboratory, Service of Infectious Diseases, Department of Medical Specialties, Geneva University Hospitals and Medical School, Geneva, Switzerland
- Bacteriology Laboratory, Department of Laboratories and Genetic Medicine, Geneva University Hospitals, Geneva, Switzerland
| | - W L Kelley
- Department of Microbiology and Molecular Medicine, Faculty of Medicine, Geneva University, Geneva, Switzerland
| | - A Renzoni
- Service of Infectious Diseases, Department of Medical Specialties, Geneva University Hospitals and Medical School, Geneva, Switzerland.
- Service of Infectious Diseases, Geneva University Hospital and Medical School, 4 Rue Gabrielle Perret Gentil, Geneva, Switzerland.
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7
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Abstract
Staphylococcus aureus, although generally identified as a commensal, is also a common cause of human bacterial infections, including of the skin and other soft tissues, bones, bloodstream, and respiratory tract. The history of S. aureus treatment is marked by the development of resistance to each new class of antistaphylococcal antimicrobial drugs, including the penicillins, sulfonamides, tetracyclines, glycopeptides, and others, complicating therapy. S. aureus isolates identified in the 1960s were sometimes resistant to methicillin, a ß-lactam antimicrobial active initially against a majority S. aureus strains. These MRSA isolates, resistant to nearly all ß-lactam antimicrobials, were first largely confined to the health care environment and the patients who attended it. However, in the mid-1990s, new strains, known as community-associated (CA-) MRSA strains, emerged. CA-MRSA organisms, compared with health care-associated (HA-) MRSA strain types, are more often susceptible to multiple classes of non ß-lactam antimicrobials. While infections caused by methicillin-susceptible S. aureus (MSSA) strains are usually treated with drugs in the ß-lactam class, such as cephalosporins, oxacillin or nafcillin, MRSA infections are treated with drugs in other antimicrobial classes. The glycopeptide drug vancomycin, and in some countries teicoplanin, is the most common drug used to treat severe MRSA infections. There are now other classes of antimicrobials available to treat staphylococcal infections, including several that have been approved after 2009. The antimicrobial management of invasive and noninvasive S. aureus infections in the ambulatory and in-patient settings is the topic of this review. Also discussed are common adverse effects of antistaphylococcal antimicrobial agents, advantages of one agent over another for specific clinical syndromes, and the use of adjunctive therapies such as surgery and intravenous immunoglobulin. We have detailed considerations in the therapy of noninvasive and invasive S. aureus infections. This is followed by sections on specific clinical infectious syndromes including skin and soft tissue infections, bacteremia, endocarditis and intravascular infections, pneumonia, osteomyelitis and vertebral discitis, epidural abscess, septic arthritis, pyomyositis, mastitis, necrotizing fasciitis, orbital infections, endophthalmitis, parotitis, staphylococcal toxinoses, urogenital infections, and central nervous system infections.
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Argudín MA, Dodémont M, Taguemount M, Roisin S, de Mendonça R, Deplano A, Nonhoff C, Denis O. In vitro activity of ceftaroline against clinical Staphylococcus aureus isolates collected during a national survey conducted in Belgian hospitals. J Antimicrob Chemother 2017; 72:56-59. [PMID: 27634917 DOI: 10.1093/jac/dkw380] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2016] [Revised: 07/27/2016] [Accepted: 08/12/2016] [Indexed: 11/14/2022] Open
Abstract
OBJECTIVES The aim of this study was to estimate the in vitro activity of ceftaroline against clinical Staphylococcus aureus isolates collected during national surveillance in Belgian acute-care hospitals. Ceftaroline-resistant isolates were further investigated for their resistance mechanisms. METHODS From October 2013 to March 2014, 155 laboratories of Belgian acute-care hospitals were invited to send to the National Reference Centre-Staphylococcus aureus (Belgium) up to five non-duplicate S. aureus including three MRSA and two MSSA from hospitalized patients. Isolates were analysed by spa typing, SCCmec typing (for MRSA) and PCR for detection of 16S-mecA-nuc and 16S-mecC. MICs of oxacillin, cefoxitin and ceftaroline were determined by the broth microdilution method. The nucleotide sequences of mecA, native pbp and gdpP genes of isolates with reduced susceptibility to ceftaroline were analysed for the presence of mutations responsible for amino acid substitutions. RESULTS Ninety-nine percent of isolates, including MRSA (n = 284) and MSSA (n = 131), were susceptible to ceftaroline. Only four MRSA isolates showed resistance to ceftaroline (MIC = 2 mg/L). These four isolates belonged to lineages CC5 (n = 1), CC22 (n = 2) and CC8 (n = 1). Two isolates (CC22 and CC8) carried mutations in mecA, as well as in other pbp genes. The remaining isolates carried mutations in native pbp genes or in gdpP. CONCLUSIONS This is the first Belgian in vitro survey on ceftaroline activity against S. aureus. This antibiotic showed excellent activity against MRSA and MSSA, and only a few MRSA isolates with resistance were found. Reduced susceptibility to ceftaroline seems a complex phenomenon due to the accumulation of mutations in genes involved in β-lactam tolerance.
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Affiliation(s)
- M Angeles Argudín
- National Reference Centre-Staphylococcus aureus, Department of Microbiology, Hôpital Erasme, Université Libre de Bruxelles, Route de Lennik 808, 1070 Brussels, Belgium
| | - M Dodémont
- National Reference Centre-Staphylococcus aureus, Department of Microbiology, Hôpital Erasme, Université Libre de Bruxelles, Route de Lennik 808, 1070 Brussels, Belgium
| | - M Taguemount
- National Reference Centre-Staphylococcus aureus, Department of Microbiology, Hôpital Erasme, Université Libre de Bruxelles, Route de Lennik 808, 1070 Brussels, Belgium
| | - S Roisin
- National Reference Centre-Staphylococcus aureus, Department of Microbiology, Hôpital Erasme, Université Libre de Bruxelles, Route de Lennik 808, 1070 Brussels, Belgium
| | - R de Mendonça
- National Reference Centre-Staphylococcus aureus, Department of Microbiology, Hôpital Erasme, Université Libre de Bruxelles, Route de Lennik 808, 1070 Brussels, Belgium
| | - A Deplano
- National Reference Centre-Staphylococcus aureus, Department of Microbiology, Hôpital Erasme, Université Libre de Bruxelles, Route de Lennik 808, 1070 Brussels, Belgium
| | - C Nonhoff
- National Reference Centre-Staphylococcus aureus, Department of Microbiology, Hôpital Erasme, Université Libre de Bruxelles, Route de Lennik 808, 1070 Brussels, Belgium
| | - O Denis
- National Reference Centre-Staphylococcus aureus, Department of Microbiology, Hôpital Erasme, Université Libre de Bruxelles, Route de Lennik 808, 1070 Brussels, Belgium
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9
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Karlowsky JA, Biedenbach DJ, Bouchillon SK, Hackel M, Iaconis JP, Sahm DF. In vitro activity of Ceftaroline against bacterial pathogens isolated from patients with skin and soft tissue and respiratory tract infections in African and Middle Eastern countries: AWARE global surveillance program 2012-2014. Diagn Microbiol Infect Dis 2016; 86:194-9. [PMID: 27461798 DOI: 10.1016/j.diagmicrobio.2016.07.012] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2016] [Revised: 07/08/2016] [Accepted: 07/10/2016] [Indexed: 11/26/2022]
Abstract
The objective of this report was to document antimicrobial susceptibility testing surveillance data for ceftaroline and comparative agents from the AWARE (Assessing Worldwide Antimicrobial Resistance Evaluation) global surveillance program for bacterial pathogens causing skin and soft tissue and respiratory tract infections in African and Middle Eastern countries from 2012 through 2014. Pathogen identities were confirmed by MALDI-TOF and antimicrobial susceptibility testing performed by CLSI broth microdilution methodology in a central laboratory. All methicillin-susceptible Staphylococcus aureus (MSSA) (n= 923; MIC90, 0.25 μg/mL) and 91.8% of methicillin-resistant S. aureus (MRSA) (n= 1161; MIC90, 1 μg/mL) tested were susceptible to ceftaroline. The maximum ceftaroline MIC observed for isolates of MRSA was 2 μg/mL. All Streptococcus pyogenes (n= 174; MIC90, 0.008 μg/mL), Streptococcus agalactiae (n= 44; MIC90, 0.015 μg/mL), Streptococcus pneumoniae (n= 351; MIC90, 0.25 μg/mL), and Haemophilus influenzae (n= 84; MIC90, ≤0.015 μg/mL) were susceptible to ceftaroline. Rates of susceptibility to ceftaroline among ESBL-negative Escherichia coli (n= 338), Klebsiella pneumoniae (n= 241), and Klebsiella oxytoca (n= 97) were 89.1% (MIC90, 1 μg/mL), 94.2% (MIC90, 0.5 μg/mL), and 99.0% (MIC90, 0.5 μg/mL), respectively.
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Affiliation(s)
- James A Karlowsky
- International Health Management Associates, Inc., Schaumburg, IL, USA
| | | | | | - Meredith Hackel
- International Health Management Associates, Inc., Schaumburg, IL, USA
| | | | - Daniel F Sahm
- International Health Management Associates, Inc., Schaumburg, IL, USA
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10
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Koeth LM, Apfalter P, Becker K, Gesu G, Martínez-Martínez L, Lahiri SD, Alm RA, Ambler J, Iaconis J. Multi-center and multi-method evaluation of in vitro activities of ceftaroline against S. aureus. Diagn Microbiol Infect Dis 2016; 85:452-8. [PMID: 27233426 DOI: 10.1016/j.diagmicrobio.2016.05.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2016] [Revised: 04/22/2016] [Accepted: 05/05/2016] [Indexed: 01/25/2023]
Abstract
This five-site study was performed to assess the reproducibility of ceftaroline MIC and disk results for Staphylococcus aureus. Three commercial broth microdilution, three gradient diffusion and ceftaroline 5μg disk diffusion methods were compared to a reference broth microdilution method against challenge isolates (n = 41) and isolates collected at four European sites (n = 30/site). For four MIC methods (Sensititre and three gradient diffusion methods), 99.0% of consolidated MIC results were within +/- 1 dilution of the reference MIC. Categorical agreement rates based on EUCAST breakpoints for the challenge isolates were 75.6-100% and for disk testing were 78.0-92.7%. There was no clear distinction between isolates with MIC results of 1 and 2mg/L with regard to variation in MIC or molecular genotyping results. The addition of an intermediate category for isolates with MIC results of 2mg/L would help to identify these isolates as borderline susceptible/non-susceptible isolates.
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Affiliation(s)
| | - Petra Apfalter
- Analyse Biolab GmbH and Johannes Kepler University, Linz, Austria
| | - Karsten Becker
- Institute of Medical Microbiology, University Hospital Münster, Münster, Germany
| | | | - Luis Martínez-Martínez
- University Hospital Marqués de Valdecilla-Instituto de Investigación Marqués de Valdecilla (IDIVAL), Department of Molecular Biology, University of Cantabria, Santander, Spain; AstraZeneca, Waltham, MA
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11
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Armengol-Porta M, Tenorio-Abreu A, Bandt D, Coleman DC, Gavier-Widen D, Hotzel H, Kinnevey P, Lazaris A, Peters M, Rangstrup-Christensen L, Schlotter K, Shore AC, Ehricht R, Monecke S. In vitro activity of ceftaroline against mecC-positive MRSA isolates. J Glob Antimicrob Resist 2016; 5:3-6. [PMID: 27436457 DOI: 10.1016/j.jgar.2016.01.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2015] [Revised: 11/13/2015] [Accepted: 01/20/2016] [Indexed: 11/18/2022] Open
Abstract
Ceftaroline is a new cephalosporin with activity against methicillin-resistant Staphylococcus aureus (MRSA). A collection of 17 clinical and veterinary mecC-positive MRSA isolates was tested to evaluate the in vitro efficacy of ceftaroline against recently emerged mecC-MRSA isolates. Minimum inhibitory concentrations (MICs) and minimum bactericidal concentrations (MBCs) of ceftaroline for the 17 isolates were determined by broth microdilution using the methodology and interpretive criteria of the Clinical and Laboratory Standards Institute (CLSI). Additional susceptibility tests were performed using ceftaroline M.I.C.Evaluator (M.I.C.E.™) strips. All isolates showed susceptibility according to CLSI breakpoints, with MICs of ceftaroline ranging from 0.125mg/L to 0.25mg/L. MBCs were identical or up to a twofold dilution step higher. In conclusion, all tested isolates, from various sources and belonging to several clonal complexes (CCs), but predominantly to CC130, were found to be susceptible to ceftaroline. Ceftaroline could thus be an option for the treatment of mecC-MRSA infections.
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Affiliation(s)
| | | | - Dirk Bandt
- Institut Oderland, Frankfurt/Oder, Germany
| | - David C Coleman
- Microbiology Research Unit, Dublin Dental University Hospital, University of Dublin, Trinity College Dublin, Dublin, Ireland
| | - Dolores Gavier-Widen
- Department of Pathology and Wildlife Disease, National Veterinary Institute (SVA), Uppsala, Sweden; Department of Biomedical Sciences and Veterinary Public Health, Swedish University of Agricultural Sciences (SLU), Uppsala, Sweden
| | - Helmut Hotzel
- Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Institute of Bacterial Infections and Zoonoses, Jena, Germany
| | - Peter Kinnevey
- Microbiology Research Unit, Dublin Dental University Hospital, University of Dublin, Trinity College Dublin, Dublin, Ireland
| | - Alexandros Lazaris
- Microbiology Research Unit, Dublin Dental University Hospital, University of Dublin, Trinity College Dublin, Dublin, Ireland
| | - Martin Peters
- Chemisches und Veterinäruntersuchungsamt Westfalen (AöR), Standort Arnsberg, Arnsberg, Germany
| | | | | | - Anna C Shore
- Microbiology Research Unit, Dublin Dental University Hospital, University of Dublin, Trinity College Dublin, Dublin, Ireland; Department of Clinical Microbiology, School of Medicine, University of Dublin, Trinity College Dublin, St. James's Hospital, Dublin, Ireland
| | - Ralf Ehricht
- Alere Technologies GmbH, Jena, Germany; INFECTOGNOSTICS Research Campus, Jena, Germany
| | - Stefan Monecke
- Alere Technologies GmbH, Jena, Germany; INFECTOGNOSTICS Research Campus, Jena, Germany; Institute for Medical Microbiology and Hygiene, Technical University of Dresden, Dresden, Germany.
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12
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Borgmann S, Rieß B, von Wernitz-Keibel T, Bühler M, Layer F, Strommenger B. Recovery of a 10-year-old girl from methicillin-resistant Staphylococcus aureus sepsis in response to low-dose ceftaroline treatment. Ther Clin Risk Manag 2016; 12:749-53. [PMID: 27274260 PMCID: PMC4868870 DOI: 10.2147/tcrm.s99987] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
A 9-year-old girl was severely injured in a car accident in Afghanistan, in which both her lower legs were badly damaged. She was treated at the Hospital of Ingolstadt (Klinikum Ingolstadt) after she had undergone initial surgery at an Indian hospital. Various bacterial species were isolated from multiple wounds, and methicillin-resistant Staphylococcus aureus (MRSA) was one among them. After the amputation of her lower legs, she developed MRSA sepsis, which was successfully treated with a relatively low dosage of ceftaroline (Zinforo(®)/Teflaro(®); 2×9 mg/kg/d), although the bacterial isolate's minimal inhibitory concentration (1.5-4 mg/L) suggested a decreased susceptibility. In summary, ceftaroline was highly efficient and well tolerated by the patient suffering from MRSA sepsis.
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Affiliation(s)
- Stefan Borgmann
- Department of Infectious Diseases and Infection Control, Klinikum Ingolstadt, Ingolstadt, Germany
| | - Beate Rieß
- Department of Infectious Diseases and Infection Control, Klinikum Ingolstadt, Ingolstadt, Germany
| | | | - Matthias Bühler
- Department of Trauma Surgery, Klinikum Ingolstadt, Ingolstadt, Germany
| | - Franziska Layer
- National Reference Centre for Staphylococci and Enterococci, Division Nosocomial Pathogens and Antibiotic Resistances, Department for Infectious Diseases, Robert Koch Institute, Wernigerode Branch, Wernigerode, Germany
| | - Birgit Strommenger
- National Reference Centre for Staphylococci and Enterococci, Division Nosocomial Pathogens and Antibiotic Resistances, Department for Infectious Diseases, Robert Koch Institute, Wernigerode Branch, Wernigerode, Germany
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13
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Abstract
Musculoskeletal infections caused by Staphylococcus aureus are among the most difficult-to-treat infections. S. aureus osteomyelitis is associated with a tremendous disease burden through potential for long-term relapses and functional deficits. Although considerable advances have been achieved in diagnosis and treatment of osteomyelitis, the management remains challenging and impact on quality of life is still enormous. S. aureus acute arthritis is relatively seldom in general population, but the incidence is considerably higher in patients with predisposing conditions, particularly those with rheumatoid arthritis. Rapidly destructive course with high mortality and disability rates makes urgent diagnosis and treatment of acute arthritis essential. S. aureus pyomyositis is a common disease in tropical countries, but it is very seldom in temperate regions. Nevertheless, the cases have been increasingly reported also in non-tropical countries, and the physicians should be able to timely recognize this uncommon condition and initiate appropriate treatment. The optimal management of S. aureus-associated musculoskeletal infections requires a strong interdisciplinary collaboration between all involved specialists.
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14
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Schaumburg F, Peters G, Alabi A, Becker K, Idelevich EA. Missense mutations of PBP2a are associated with reduced susceptibility to ceftaroline and ceftobiprole in African MRSA. J Antimicrob Chemother 2016; 71:41-4. [PMID: 26443816 DOI: 10.1093/jac/dkv325] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Accepted: 09/07/2015] [Indexed: 12/16/2023] Open
Abstract
OBJECTIVES Ceftaroline and ceftobiprole are new cephalosporins, which are active against MRSA by inhibiting PBP2a. Recently, high rates of resistance to ceftaroline were reported from Ghana. The objective of this study was to assess rates of resistance to ceftaroline and ceftobiprole in MRSA from Africa and to describe potential missense mutations of PBP2a. METHODS MRSA isolates derived from Staphylococcus aureus colonization (n = 37) and infection (n = 23) and were collected in Côte d'Ivoire (n = 17), DR Congo (n = 6), Gabon (n = 21) and Nigeria (n = 16). The MICs were determined by the broth microdilution method. The mecA gene was sequenced and missense mutations were associated with the corresponding MLST ST. RESULTS In total, 16.7% (n = 10) and 15% (n = 9) of isolates were resistant to ceftaroline and ceftobiprole, respectively. The corresponding MICs of ceftaroline and ceftobiprole correlated significantly (r = 0.92). Isolates belonging to ST241 harboured a triple mutation of PBP2a (N146K-N204K-G246E), which was associated with high rates of resistance to ceftaroline (90.9%) and ceftobiprole (81.8%). CONCLUSIONS Resistances to ceftaroline and ceftobiprole were only detected in Nigeria and were associated with ST241 and a triple mutation of PBP2a.
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Affiliation(s)
- Frieder Schaumburg
- Institute of Medical Microbiology, University Hospital Münster, Münster, Germany
| | - Georg Peters
- Institute of Medical Microbiology, University Hospital Münster, Münster, Germany
| | - Abraham Alabi
- Centre de Recherches Médicales de Lambaréné, Lambaréné, Gabon
| | - Karsten Becker
- Institute of Medical Microbiology, University Hospital Münster, Münster, Germany
| | - Evgeny A Idelevich
- Institute of Medical Microbiology, University Hospital Münster, Münster, Germany
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15
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Livermore DM, Mushtaq S, Warner M, James D, Woodford N. Susceptibility testing challenges with ceftaroline, MRSA and a 1 mg/L breakpoint. J Antimicrob Chemother 2015; 70:3259-66. [PMID: 26318188 DOI: 10.1093/jac/dkv265] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2015] [Accepted: 07/31/2015] [Indexed: 11/13/2022] Open
Abstract
OBJECTIVES A 1 mg/L susceptibility breakpoint for ceftaroline and staphylococci is universally agreed; EUCAST counts MIC >1 mg/L as resistant whereas CLSI and FDA count 2 mg/L as intermediate and >2 mg/L as resistant. We investigated whether routine diagnostic tests reliably distinguish MICs of 1 versus 2 mg/L. METHODS Thirty-five UK laboratories collected Staphylococcus aureus isolates and performed tests with 5 μg (as EUCAST) or 30 μg (as CLSI) discs and either confluent growth on Mueller-Hinton agar (as EUCAST and CLSI) or semi-confluent growth on Iso-Sensitest agar (as BSAC). They also ran Etests for MRSA. Reference MICs were determined centrally by CLSI and BSAC agar dilution. RESULTS We obtained paired local disc and central MIC results for 1607 S. aureus (33% MRSA). EUCAST's zone breakpoint recognized 56% of isolates found resistant in MIC tests, but the positive predictive value (PPV) for resistance was 11.0%; corresponding proportions by CLSI testing were 28.0% and 13.4%. The BSAC disc method detected 25% of resistant isolates, with a PPV of 18.2%. Essential agreement, ±1 dilution, of local Etests and central agar MICs was >95%, but only 20% of the isolates found non-susceptible by agar dilution were found non-susceptible by Etest and vice versa. Review for isolates with the modal MIC (0.25 mg/L) indicated that the same laboratories reported large or small zones irrespective of disc and method, implying systematic bias. CONCLUSIONS MRSA with ceftaroline MICs of 1 and 2 mg/L were poorly discriminated by routine methods. Solutions lie in greater standardization, automation or dosages justifying a higher breakpoint.
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Affiliation(s)
- David M Livermore
- Antimicrobial Resistance and Healthcare Associated Infections Reference Unit, Public Health England, London, UK Norwich Medical School, University of East Anglia, Norwich, Norfolk, UK
| | - Shazad Mushtaq
- Antimicrobial Resistance and Healthcare Associated Infections Reference Unit, Public Health England, London, UK
| | - Marina Warner
- Antimicrobial Resistance and Healthcare Associated Infections Reference Unit, Public Health England, London, UK
| | - Dorothy James
- Antimicrobial Resistance and Healthcare Associated Infections Reference Unit, Public Health England, London, UK
| | - Neil Woodford
- Antimicrobial Resistance and Healthcare Associated Infections Reference Unit, Public Health England, London, UK
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16
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Abbott IJ, Jenney AWJ, Jeremiah CJ, Mirčeta M, Kandiah JP, Holt DC, Tong SYC, Spelman DW. Reduced In Vitro Activity of Ceftaroline by Etest among Clonal Complex 239 Methicillin-Resistant Staphylococcus aureus Clinical Strains from Australia. Antimicrob Agents Chemother 2015; 59:7837-41. [PMID: 26392488 PMCID: PMC4649159 DOI: 10.1128/aac.02015-15] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2015] [Accepted: 09/12/2015] [Indexed: 01/13/2023] Open
Abstract
A total of 421 methicillin-resistant Staphylococcus aureus (MRSA) clinical isolates were tested for ceftaroline susceptibility by Etest (bioMérieux). A multidrug resistant phenotype was found in 40.9%, and clonal complex 239 (CC239) was found in 33.5%. Ceftaroline nonsusceptibility (MIC, >1.0 μg/ml) was 16.9% overall. Nonsusceptibility was significantly higher in CC239 (41.1%, 58/141) and in isolates with a multidrug resistant phenotype (35.5%, 61/172) compared with comparators (P < 0.0001). Nonsusceptibility of common multidrug resistant MRSA clones limits the empirical use of ceftaroline for these infections.
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Affiliation(s)
- I J Abbott
- Alfred Hospital, Melbourne, Victoria, Australia
| | | | | | - M Mirčeta
- Alfred Hospital, Melbourne, Victoria, Australia
| | - J P Kandiah
- Menzies School of Health Research, Charles Darwin University, Darwin, Northern Territory, Australia
| | - D C Holt
- Menzies School of Health Research, Charles Darwin University, Darwin, Northern Territory, Australia
| | - S Y C Tong
- Menzies School of Health Research, Charles Darwin University, Darwin, Northern Territory, Australia
| | - D W Spelman
- Alfred Hospital, Melbourne, Victoria, Australia
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17
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Livermore DM, Mushtaq S, Warner M, James D, Kearns A, Woodford N. Pathogens of skin and skin-structure infections in the UK and their susceptibility to antibiotics, including ceftaroline. J Antimicrob Chemother 2015; 70:2844-53. [PMID: 26142478 DOI: 10.1093/jac/dkv179] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2015] [Accepted: 06/01/2015] [Indexed: 12/16/2023] Open
Abstract
OBJECTIVES Bacterial skin and skin-structure infections (SSSIs) are frequent settings for antibiotic use. We surveyed their UK aetiology and pathogen susceptibility, including susceptibility to ceftaroline. METHODS Consecutive SSSI isolates were collected at 35 UK hospitals, to a maximum of 60/site, together with 15 'supplementary' MRSA/site. Isolates were re-identified and BSAC susceptibility testing was performed, with parallel CLSI agar testing for ceftaroline. RESULTS Isolates (n = 1908) were collected from 1756 hospitalized patients, predominantly with surgical and traumatic infections, abscesses and infected ulcers and largely from general medicine and general surgery patients. They included 1271 Staphylococcus aureus (201 MRSA), 162 β-haemolytic streptococci, 269 Enterobacteriaceae, 138 Pseudomonas aeruginosa and 37 enterococci. Most (944/1756) patients had monomicrobial MSSA infections. Rates of resistance to quinolones, gentamicin and cephalosporins were <20% in Enterobacteriaceae and <10% in P. aeruginosa. MRSA rates varied greatly among hospitals and were 2.5-fold higher in general medicine than in general surgery patients. At breakpoint, ceftaroline inhibited: (i) all MSSA and 97.6% of MRSA, with MICs of 2 mg/L for the few resistant MRSA; (ii) all β-haemolytic streptococci; and (iii) 83% of Enterobacteriaceae. High-level ceftaroline resistance in Enterobacteriaceae involved ESBLs or AmpC enzymes. Ceftaroline MICs by CLSI methodology generally equalled those by BSAC or were 2-fold higher, but this differential was 4-16-fold for P. aeruginosa. CONCLUSIONS Irrespective of patient group, SSSIs were dominated by S. aureus. Most pathogens were susceptible, but 15.8% of S. aureus were MRSA, with locally higher prevalence.
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Affiliation(s)
- David M Livermore
- Antimicrobial Resistance and Healthcare Associated Infections Reference Unit, Public Health England, 61 Colindale Avenue, London NW9 5EQ, UK Norwich Medical School, University of East Anglia, Norwich NR4 7JT, UK
| | - Shazad Mushtaq
- Antimicrobial Resistance and Healthcare Associated Infections Reference Unit, Public Health England, 61 Colindale Avenue, London NW9 5EQ, UK
| | - Marina Warner
- Antimicrobial Resistance and Healthcare Associated Infections Reference Unit, Public Health England, 61 Colindale Avenue, London NW9 5EQ, UK
| | - Dorothy James
- Antimicrobial Resistance and Healthcare Associated Infections Reference Unit, Public Health England, 61 Colindale Avenue, London NW9 5EQ, UK
| | - Angela Kearns
- Antimicrobial Resistance and Healthcare Associated Infections Reference Unit, Public Health England, 61 Colindale Avenue, London NW9 5EQ, UK
| | - Neil Woodford
- Antimicrobial Resistance and Healthcare Associated Infections Reference Unit, Public Health England, 61 Colindale Avenue, London NW9 5EQ, UK
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