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Joshi M, O'Toole RV, Carlini AR, Gary JL, Obremskey WT, Murray CK, Gaski G, Reid JS, Degani Y, Taylor TJ, Collins SC, Huang Y, Whiting PS, Patterson JT, Lee OC, Castillo RC. Does Topical Vancomycin Powder Use in Fracture Surgery Change Bacteriology and Antibiotic Susceptibilities? An Analysis of the VANCO Trial. J Orthop Trauma 2024; 38:183-189. [PMID: 38206761 DOI: 10.1097/bot.0000000000002767] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Accepted: 01/05/2024] [Indexed: 01/13/2024]
Abstract
OBJECTIVE To determine whether intrawound vancomycin changes the bacteriology of surgical site infection pathogens and investigate the emergence of antibiotic-resistant pathogens. METHODS DESIGN Secondary analysis of phase III, prospective, randomized clinical trial. SETTING Thirty-six US trauma centers. PATIENT SELECTION CRITERIA Patients who became infected after fixation of tibial plateau or pilon fracture. OUTCOME MEASURES AND COMPARISONS Pathogen types and bacterial susceptibilities as determined from routine clinical culture in the operating room. RESULTS Seventy-four patients were studied who were 67.5% male with a mean age of 48.6 years. A lower proportion of gram-positive cocci was observed in the vancomycin powder compared with the standard-of-care group (3.7% vs. 8.0%, P = 0.01). Methicillin-resistant Staphylococcus aureus infection incidence was comparable in both the vancomycin powder and the standard-of-care groups, but rates of methicillin-susceptible S. aureus infections were lower in the treatment group (1.4% vs. 4.8%, P = 0.01). The incidence of coagulase-negative Staphylococci and gram-negative rod infections were similar in both groups. There was no significant difference in susceptibilities between groups in rates of vancomycin-resistant enterococcus. CONCLUSIONS Topical vancomycin powder decreases the likelihood of gram-positive infections consistent with the biologic activity of vancomycin. Fewer methicillin-susceptible S. aureus and coagulase-negative Staphylococci infections were observed in the group treated with vancomycin powder. An effect of vancomycin powder on methicillin-resistant S. aureus infection risk was not detected given the low incidence in both the intrawound vancomycin and the standard-of-care groups. There was no emergence of gram-negative rod infections or increased resistance patterns observed. Use of topical vancomycin powder does not seem to produce infections in these patients with greater antibiotic resistance than would have occurred without its use. LEVEL OF EVIDENCE Therapeutic Level II. See Instructions for Authors for a complete description of levels of evidence.
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Affiliation(s)
- Manjari Joshi
- Division of Infectious Disease, R Adams Cowley Shock Trauma Center, University of Maryland School of Medicine, Baltimore, MD
| | - Robert V O'Toole
- Department of Orthopaedics, R Adams Cowley Shock Trauma Center, University of Maryland School of Medicine, Baltimore, MD
| | - Anthony R Carlini
- Department of Health Policy and Management, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD
| | - Joshua L Gary
- Department of Orthopaedic Surgery, Keck School of Medicine of the University of Southern California, Los Angeles, CA
| | - William T Obremskey
- Department of Orthopaedic Surgery, Vanderbilt University Medical Center, Nashville, TN
| | | | | | - J Spence Reid
- Department of Orthopaedics and Rehabilitation, Penn State Health Milton S. Hershey Medical Center, Hershey, PA
| | - Yasmin Degani
- Department of Orthopaedics, R Adams Cowley Shock Trauma Center, University of Maryland School of Medicine, Baltimore, MD
| | - Tara J Taylor
- Department of Health Policy and Management, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD
| | - Susan C Collins
- Department of Health Policy and Management, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD
| | - Yanjie Huang
- University of Michigan School of Dentistry, Ann Arbor, MI
| | - Paul S Whiting
- Department of Orthopedics and Rehabilitation, University of Wisconsin, Madison, WI; and
| | - Joseph T Patterson
- Department of Orthopaedic Surgery, Keck School of Medicine of the University of Southern California, Los Angeles, CA
| | - Olivia C Lee
- Department of Orthopaedics, Louisiana State University Health Sciences Center, New Orleans, LA
| | - Renan C Castillo
- Department of Health Policy and Management, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD
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Mirzaei R, Alikhani MY, Arciola CR, Sedighi I, Irajian G, Jamasbi E, Yousefimashouf R, Bagheri KP. Highly Synergistic Effects of Melittin With Vancomycin and Rifampin Against Vancomycin and Rifampin Resistant Staphylococcus epidermidis. Front Microbiol 2022; 13:869650. [PMID: 35814659 PMCID: PMC9260053 DOI: 10.3389/fmicb.2022.869650] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Accepted: 05/11/2022] [Indexed: 12/27/2022] Open
Abstract
Methicillin-resistant Staphylococcus epidermidis (MRSE) strains are increasingly emerging as serious pathogens because they can be resistant to many antibiotics called multidrug resistance (MDR) that limit the therapeutic options. In the case of vancomycin- and rifampin-resistant MDR-MRSE, the physicians are not allowed to increase the doses of antibiotics because of severe toxicity. Accordingly, we investigated the synergistic activity of melittin antimicrobial peptide with vancomycin and rifampin against vancomycin-resistant, and rifampin-resistant MDR-MRSE isolates. Minimum inhibitory concentration (MIC), minimum bactericidal concentration (MBC), fractional inhibitory concentration index (FICi), and fractional bactericidal concentration index (FBCi) of antimicrobial agents against isolates were determined. Coagulate activities and serum and salt stability as well as melittin cytotoxicity on the human embryonic kidney (HEK) 293 cells and human red blood cells (RBCs) at their synergistic concentrations. MIC and MBC values for melittin were in the range of 0.312–2.5 and 0.312–5, respectively. Results also showed that the interaction of melittin with drugs was highly synergistic in which the geometric means of FICi and FBCi were < 0.5. Induced synergism led to a decrease in melittin, rifampin, and vancomycin concentrations by 8–1,020, 2–16, and 4–16-folds, respectively. This phenomenon caused a reduction in melittin toxicity by which the synergistic concentration of melittin needed to kill bacteria did not show cytotoxicity and hemolytic activity. Besides, no coagulation activity was found for the synergistic and alone concentrations of melittin in both Prothrombin Time (PT) and Partial Thromboplastin Time (PTT). Interestingly, the antibacterial activity of melittin in Mueller Hinton Broth (MHB) containing human serum did no significant differences between MIC and MBC values of melittin in MHB and MHB containing 10% human serum. The present findings showed that the therapeutic index of melittin was improved by 32.08- and 12.82-folds when combined with vancomycin and rifampin, respectively. Taken together, the obtained data show that melittin alone was effective against MDR-MRSE isolates and this antimicrobial peptide showed highly synergistic effects with vancomycin and rifampin without causing toxicity. Therefore, the combination of melittin and traditional antibiotics could be a promising strategy for the treatment of infections caused by MDR-MRSE.
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Affiliation(s)
- Rasoul Mirzaei
- Department of Microbiology, School of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
- Venom and Biotherapeutics Molecules Laboratory, Medical Biotechnology Department, Biotechnology Research Center, Pasteur Institute of Iran, Tehran, Iran
| | - Mohammad Yousef Alikhani
- Department of Microbiology, School of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Carla Renata Arciola
- Laboratorio di Patologia delle Infezioni Associate all’Impianto, IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy
- Laboratorio di Immunoreumatologia e Rigenerazione Tissutale, IRCCS Istituto Ortopedico Rizzoli, Bologn, Italy
- Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna, Italy
| | - Iraj Sedighi
- Department of Pediatrics, School of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
| | - GholamReza Irajian
- Microbial Biotechnology Research Center, Iran University of Medical Sciences, Tehran, Iran
- Department of Microbiology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Elaheh Jamasbi
- Research Center of Oils and Fats, Kermanshah University of Medical Science, Kermanshah, Iran
| | - Rasoul Yousefimashouf
- Department of Microbiology, School of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
- *Correspondence: Rasoul Yousefimashouf,
| | - Kamran Pooshang Bagheri
- Venom and Biotherapeutics Molecules Laboratory, Medical Biotechnology Department, Biotechnology Research Center, Pasteur Institute of Iran, Tehran, Iran
- Kamran Pooshang Bagheri,
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Clinical Infections, Antibiotic Resistance, and Pathogenesis of Staphylococcus haemolyticus. Microorganisms 2022; 10:microorganisms10061130. [PMID: 35744647 PMCID: PMC9231169 DOI: 10.3390/microorganisms10061130] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2022] [Revised: 05/27/2022] [Accepted: 05/27/2022] [Indexed: 11/16/2022] Open
Abstract
Staphylococcus haemolyticus (S. haemolyticus) constitutes the main part of the human skin microbiota. It is widespread in hospitals and among medical staff, resulting in being an emerging microbe causing nosocomial infections. S. haemolyticus, especially strains that cause nosocomial infections, are more resistant to antibiotics than other coagulase-negative Staphylococci. There is clear evidence that the resistance genes can be acquired by other Staphylococcus species through S. haemolyticus. Severe infections are recorded with S. haemolyticus such as meningitis, endocarditis, prosthetic joint infections, bacteremia, septicemia, peritonitis, and otitis, especially in immunocompromised patients. In addition, S. haemolyticus species were detected in dogs, breed kennels, and food animals. The main feature of pathogenic S. haemolyticus isolates is the formation of a biofilm which is involved in catheter-associated infections and other nosocomial infections. Besides the biofilm formation, S. haemolyticus secretes other factors for bacterial adherence and invasion such as enterotoxins, hemolysins, and fibronectin-binding proteins. In this review, we give updates on the clinical infections associated with S. haemolyticus, highlighting the antibiotic resistance patterns of these isolates, and the virulence factors associated with the disease development.
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Selim S, Faried OA, Almuhayawi MS, Saleh FM, Sharaf M, El Nahhas N, Warrad M. Incidence of Vancomycin-Resistant Staphylococcus aureus Strains among Patients with Urinary Tract Infections. Antibiotics (Basel) 2022; 11:antibiotics11030408. [PMID: 35326871 PMCID: PMC8944512 DOI: 10.3390/antibiotics11030408] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2022] [Revised: 03/15/2022] [Accepted: 03/16/2022] [Indexed: 12/29/2022] Open
Abstract
There has been a substantial rise in the number of vancomycin-resistant Staphylococcus aureus (VRSA) strains during the last several years. The proportion of vancomycin-resistant strains among isolated S. aureus has risen steadily in recent years, with the first spike occurring in critical care units and thereafter in general hospital wards. S. aureus isolates from urinary tract infection patients were studied for their prevalence and antibiotic resistance. From 292 urine samples, 103 bacterial strains (35.3%) were identified as S. aureus. Various antibiotics were used to test the isolates’ antibacterial resistance profiles. Antibiotic resistance to erythromycin was found in most bacterial isolates, whereas tobramycin antibiotic sensitivity was found in most of them. Vancomycin resistance was found in 23 of all S. aureus isolates in this study. Analysis for β-lactamase found that 71% of S. aureus isolates were positive in all isolates. There was a single plasmid with a molecular weight of 39.306 Kbp in five selected VRSA isolates that was subjected to plasmid analysis. There was evidence of vancomycin resistance among the S. aureus isolates collected from UTI patients in this investigation. This vancomycin resistance pretenses a challenge in the treatment of S. aureus infections and the need to precisely recognize persons who require last-resort medication such as tobramycin.
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Affiliation(s)
- Samy Selim
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Jouf University, Sakaka 72341, Saudi Arabia
- Correspondence:
| | - Osama Ahmed Faried
- Medical Microbiology and Immunology Department, Faculty of Medicine, Beni-Suef University, Beni-Suef 62513, Egypt;
| | - Mohammed S. Almuhayawi
- Department of Medical Microbiology and Parasitology, Faculty of Medicine, King Abdulaziz University, Jeddah 21589, Saudi Arabia;
| | - Fayez M. Saleh
- Department of Medical Microbiology, Faculty of Medicine, University of Tabuk, Tabuk 71491, Saudi Arabia;
| | - Mohamed Sharaf
- Department of Biochemistry, Faculty of Agriculture, AL-Azhar University, Cairo 11651, Egypt;
- Department of Biochemistry and Molecular Biology, College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China
| | - Nihal El Nahhas
- Department of Botany and Microbiology, Faculty of Science, Alexandria University, Alexandria 21526, Egypt;
| | - Mona Warrad
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences at Al-Quriat, Jouf University, Al-Quriat 77454, Saudi Arabia;
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5
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Selim S. Mechanisms of gram-positive vancomycin resistance (Review). Biomed Rep 2021; 16:7. [PMID: 34938536 DOI: 10.3892/br.2021.1490] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Accepted: 11/15/2021] [Indexed: 11/05/2022] Open
Abstract
Vancomycin-resistant bacteria (VRB) are important consideration in medicine and public health as they can cause life-threatening infections that appear to be resistant to therapy and persist in the body after medication. A wide spectrum of antimicrobial resistance characteristics, as well as various environmental and animal settings underlie the evolution of the most prevalent the most prevalent van genes in the VRB genome, indicating significant gene flow. As illnesses caused by VRB have become increasingly complex, several previously effective therapeutic techniques have become ineffective, complicating clinical care further. The focus of this review is the mechanism of vancomycin resistance in Enterococci, Staphylococci and Lactobacilli.
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Affiliation(s)
- Samy Selim
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Jouf University, Sakaka 72341, Kingdom of Saudi Arabia
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Riccobono E, Giani T, Baldi G, Arcangeli S, Antonelli A, Tellone V, Vecchio AD, De Joannon AC, Rossolini GM. Update on activity of dalbavancin and comparators against clinical isolates of Gram-positive pathogens from Europe and Russia (2017-2018), and on clonal distribution of MRSA. Int J Antimicrob Agents 2021; 59:106503. [PMID: 34929289 DOI: 10.1016/j.ijantimicag.2021.106503] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Revised: 12/03/2021] [Accepted: 12/11/2021] [Indexed: 11/17/2022]
Abstract
BACKGROUND Gram-positive pathogens remain a major cause of healthcare- and community-associated infections. In particular, the dissemination of methicillin-resistant staphylococci, as methicillin-resistant S. aureus (MRSA) and vancomycin-resistant enterococci (VRE), have significantly reduced the therapeutic options, making the management of these infections even more challenging. Dalbavancin is a second-generation lipoglycopeptide approved for the treatment of moderate to severe acute bacterial skin and skin structure infections (ABSSSIs) caused by Gram-positive organisms, showing a bactericidal effect and a low propensity towards the selection of resistance over time. AIM This study aimed to evaluate the antimicrobial activity of dalbavancin and other comparators against recent clinical isolates of Gram-positive pathogens obtained from different sources and from several European countries, including countries of southern and eastern Europe and Russia, where resistance rates are typically high. This study also aimed to describe the clonal relationship of MRSA strains circulating in southern and eastern Europe and Russia. RESULTS A total of 1478 isolates were collected. Study results demonstrated the excellent and stable activity of dalbavancin against Gram-positive microorganisms, including MRSA. Interestingly, dalbavancin has retained unaltered MIC50 and MIC90 values over the years and seemed to have a low propensity in selecting resistance mechanisms. CONCLUSIONS Our data supported the potential efficacy of dalbavancin against Gram-positive bacteria and uncommon Gram-positive pathogens in patients with ABSSSIs. Of note, few CoNS isolates were resistant to dalbavancin and susceptible to vancomycin, pointing out the importance of testing the susceptibility to dalbavancin before its administration for CoNS infections.
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Affiliation(s)
- Eleonora Riccobono
- Department of Experimental and Clinical Medicine, University of Florence, Florence, Italy
| | - Tommaso Giani
- Department of Experimental and Clinical Medicine, University of Florence, Florence, Italy; Clinical Microbiology and Virology Unit, Careggi University Hospital, Florence, Italy
| | - Giulia Baldi
- Department of Experimental and Clinical Medicine, University of Florence, Florence, Italy
| | - Sophie Arcangeli
- Department of Experimental and Clinical Medicine, University of Florence, Florence, Italy
| | - Alberto Antonelli
- Department of Experimental and Clinical Medicine, University of Florence, Florence, Italy; Clinical Microbiology and Virology Unit, Careggi University Hospital, Florence, Italy
| | | | | | | | - Gian Maria Rossolini
- Department of Experimental and Clinical Medicine, University of Florence, Florence, Italy; Clinical Microbiology and Virology Unit, Careggi University Hospital, Florence, Italy.
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Sader HS, Carvalhaes CG, Streit JM, Arends SJR, Mendes RE. Antimicrobial activity of dalbavancin against clinical isolates of coagulase-negative staphylococci from the USA and Europe stratified by species. J Glob Antimicrob Resist 2020; 24:48-52. [PMID: 33285311 DOI: 10.1016/j.jgar.2020.11.020] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 10/16/2020] [Accepted: 11/17/2020] [Indexed: 10/22/2022] Open
Abstract
OBJECTIVES To evaluate the in vitro activity of dalbavancin compared with vancomycin, daptomycin and other agents against a large collection of coagulase-negative staphylococci (CoNS) isolates. METHODS A total of 5088 CoNS causing clinically significant infection were consecutively collected from 122 medical centres in the USA and Europe over 6 years (2014-2019). Isolates were tested for susceptibility by the reference broth microdilution method. Species identification was confirmed by MALDI-TOF. Most isolates were from bloodstream infections (BSIs) (53.5%) or skin/skin structure infections (28.5%). RESULTS Staphylococcus epidermidis was the most common species overall (54.6%) and for BSI (61.3%). The second most common species were Staphylococcus lugdunensis overall (12.3%) and Staphylococcus hominis for BSI (14.7%). Dalbavancin (MIC50/90, 0.03/0.06 mg/L) inhibited >99.9% of CoNS isolates at ≤0.25 mg/L (susceptible breakpoint for Staphylococcus aureus per CLSI). All species were inhibited at ≤0.25 mg/L dalbavancin, except some S. epidermidis (>99.9%) and Staphylococcus warneri (98.9%) isolates. Staphylococcus capitis and Staphylococcus simulans exhibited the lowest dalbavancin MIC50/90 values (0.015/0.03 mg/L) and Staphylococcus haemolyticus and Staphylococcus saprophyticus the highest (MIC50/90, 0.06/0.12 mg/L); 47.8% of S. epidermidis and 34.7% of S. haemolyticus exhibited decreased susceptibility to vancomycin (MIC ≥ 2 mg/L) and 23.2% of S. capitis and 28.4% of S. warneri showed decreased susceptibility to daptomycin (MIC ≥ 1 mg/L). CONCLUSION Antimicrobial susceptibility varied widely among CoNS species. Dalbavancin inhibited >99.9% and 99.1% of isolates at the US-FDA and EUCAST breakpoints, respectively. Clinical studies of dalbavancin for treatment of CoNS infections should be considered based on these in vitro data.
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Prevalence of Coagulase Negative Staphylococcus and their Antibiotic Sensitivity Pattern from Various Clinical Samples. JOURNAL OF PURE AND APPLIED MICROBIOLOGY 2020. [DOI: 10.22207/jpam.14.2.20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Nicolosi D, Cinà D, Di Naso C, D’Angeli F, Salmeri M, Genovese C. Antimicrobial Resistance Profiling of Coagulase-Negative Staphylococci in a Referral Center in South Italy: A Surveillance Study. Open Microbiol J 2020. [DOI: 10.2174/1874285802014010091] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Background:
CoNS are part of the normal flora of the skin, upper respiratory tract and human intestine. CoNS are able to colonize host tissues or inert materials such as prosthetics, heart valves, pacemakers, and urinary and venous catheters. They can also internalize in host cells, thus eluding immune defenses and attack by antibiotics.
Objective:
In this study, we collected the epidemiological data and determined the antibiotic susceptibility of 828 CoNS, collected in Garibaldi Hospital (Catania, Italy) between January 2016 and October 2018.
Methods:
Strains were evaluated by determining the Minimum Inhibitory Concentration (MIC) using the broth microdilution method, according to the guidelines of the Clinical and Laboratory Standards Institute. The antibiotic sensitivity pattern of CoNS against eighteen antibiotics was determined.
Results:
For all the 828 clinical isolates, varying resistance rates were observed: ampicillin (87%), penicillin (86%), amoxicillin-clavulanate (71%), oxacillin (70%), erythromycin (69%), azithromycin (68%), levofloxacin (55%), ciprofloxacin (54%), gentamycin (47%), moxifloxacin (42%), trimethoprim-sulfamethoxazole (30%), clindamycin (28%), tetracycline (24%), rifampicin (20%), quinupristin-dalfopristin (synercid) (4%). No strains investigated demonstrated resistance to teicoplanin, vancomycin and linezolid.
Conclusion:
Our results highlight the importance of monitoring the evolution of CoNS resistance in order to implement control measures and reduce the risk of spread in the population.
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Vimberg V, Zieglerova L, Závora J, Šemberová L, Prásilová J, Adámková V, Novotna GB. Draft genome sequences of three clinical isolates of teicoplanin-resistant Staphylococcus epidermidis from patients without prior exposure to glycopeptide antibiotics. J Glob Antimicrob Resist 2019; 16:251-253. [PMID: 30797086 DOI: 10.1016/j.jgar.2019.02.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Revised: 01/21/2019] [Accepted: 02/08/2019] [Indexed: 11/18/2022] Open
Abstract
OBJECTIVES The aim of this study was to analyse the DNA sequences of three teicoplanin-resistant Staphylococcus epidermidis isolates collected from patients not previously treated with glycopeptide antibiotics. METHODS The minimum inhibitory concentrations (MICs) of 12 antibiotics, including teicoplanin and vancomycin, were determined by the broth microdilution method. Genomic DNA was isolated, was sequenced by HiSeqX paired-end sequencing and was assembled into draft genome sequences using MyPro pipeline. RESULTS Analysis of the draft genome sequences demonstrated that the teicoplanin-resistant S. epidermidis isolates belonged to multilocus sequence typing (MLST) sequence types ST5 and ST87 and encoded multiple antimicrobial resistance genes, including the methicillin resistance gene mecA. CONCLUSIONS This report highlights the risk of dissemination of S. epidermidis strains resistant to a wide range of clinically important antibiotics.
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Affiliation(s)
- Vladimir Vimberg
- Laboratory for Biology of Secondary Metabolism, Institute of Microbiology of the Academy of Sciences of the Czech Republic, BIOCEV, Průmyslová 595, 252 50 Vestec, Czech Republic.
| | - Leona Zieglerova
- Laboratory for Biology of Secondary Metabolism, Institute of Microbiology of the Academy of Sciences of the Czech Republic, BIOCEV, Průmyslová 595, 252 50 Vestec, Czech Republic
| | - Jan Závora
- Clinical Microbiology and ATB Centre, Institute of Medical Biochemistry and Laboratory Diagnostics, General University Hospital, Prague, Czech Republic
| | - Lenka Šemberová
- Clinical Microbiology and ATB Centre, Institute of Medical Biochemistry and Laboratory Diagnostics, General University Hospital, Prague, Czech Republic
| | - Jana Prásilová
- Laboratory for Biology of Secondary Metabolism, Institute of Microbiology of the Academy of Sciences of the Czech Republic, BIOCEV, Průmyslová 595, 252 50 Vestec, Czech Republic
| | - Václava Adámková
- Clinical Microbiology and ATB Centre, Institute of Medical Biochemistry and Laboratory Diagnostics, General University Hospital, Prague, Czech Republic; Department of Medical Microbiology, Medical Faculty of Palacký University, Olomouc, Czech Republic
| | - Gabriela Balikova Novotna
- Laboratory for Biology of Secondary Metabolism, Institute of Microbiology of the Academy of Sciences of the Czech Republic, BIOCEV, Průmyslová 595, 252 50 Vestec, Czech Republic
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Hagiya H, Sugawara Y, Kimura K, Hamaguchi S, Nishi I, Hayashi M, Akeda Y, Tomono K. Emergence of daptomycin non-susceptible coagulase-negative Staphylococci in patients with cardiovascular device infections: Two cases report investigated by whole genome analysis. Medicine (Baltimore) 2018; 97:e13487. [PMID: 30544442 PMCID: PMC6310605 DOI: 10.1097/md.0000000000013487] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
RATIONALE Daptomycin (DAP) is a key drug for treating severe Staphylococcus infections. The emergence of DAP non-susceptible Staphylococcus aureus has been widely recognized in clinical situations, although the clinical status of DAP non-susceptible coagulase-negative Staphylococcus (CoNS) infections is unclear. We encountered 2 cases of cardiovascular device infections that were associated with DAP non-susceptible CoNS. PATIENT CONCERNS The first case involved a 60-year-old woman with a pump pocket infection in a left ventricular assist device. DAP non-susceptible Staphylococcus capitis subsp. ureolyticus was isolated from a blood culture after treatment using vancomycin (10 days) and DAP (6 days). The second case involved a 71-year-old man with an aortic graft infection. DAP non-susceptible S capitis subsp. ureolyticus was detected in pus after treatment using vancomycin (2 weeks) and DAP (1 week) without complete removal and debridement. DIAGNOSIS Cardiovascular device infections caused by DAP non-susceptible CoNS. INTERVENTIONS AND OUTCOMES Whole genome sequencing of these strains revealed multiple mutations in genes that are related to DAP-non-susceptibility in S aureus, which created amino acid substitutions in mprF, dltAB, dltD, rpoC, yycG, cls2, pgsA, and vraSR. To the very best of our knowledge, the substitution patterns were not identical to those previously reported in DAP non-susceptibile S aureus. LESSONS Clinicians should be cautious regarding the emergence of DAP non-susceptible CoNS, especially in cases with implanted prosthetic devices, inadequate debridement, and prior usage of vancomycin and DAP. Further studies are needed to understand the relevance of these genetic changes and DAP-non-susceptibility in CoNS strains.
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Affiliation(s)
- Hideharu Hagiya
- Division of Infection Control and Prevention, Osaka University Hospital
| | - Yo Sugawara
- Japan-Thailand Research Collaboration Center for Infectious Diseases, Research Institute for Microbial Diseases, Osaka University
| | - Keigo Kimura
- Laboratory for Clinical Investigation, Osaka University Hospital, Osaka
| | - Shigeto Hamaguchi
- Division of Infection Control and Prevention, Osaka University Hospital
| | - Isao Nishi
- Laboratory for Clinical Investigation, Osaka University Hospital, Osaka
| | - Masahiro Hayashi
- Center for Conservation of Microbial Genetic Resource, Gifu University, Gifu, Japan
| | - Yukihiro Akeda
- Division of Infection Control and Prevention, Osaka University Hospital
- Japan-Thailand Research Collaboration Center for Infectious Diseases, Research Institute for Microbial Diseases, Osaka University
| | - Kazunori Tomono
- Division of Infection Control and Prevention, Osaka University Hospital
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Presterl E, Lassnigg A, Parschalk B, Yassin F, Adametz H, Graninger W. Clinical Behavior of Implant Infections Due to Staphylococcus Epidermidis. Int J Artif Organs 2018; 28:1110-8. [PMID: 16353117 DOI: 10.1177/039139880502801108] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Surgical implants and other foreign material are increasingly used in modern medicine to restore or to improve the function of the human body. Infection of an implant is associated with considerable morbidity due to frequent hospitalizations, surgery and antimicrobial treatment. The underlying mechanism is the formation of a bacterial biofilm on the surface of the implanted body. The recognition and diagnosis of implant infections is essential for further therapy and, above all, the decision to remove and exchange the implant. Methods We compared the data of 60 patients with implant infections with those of 60 patients with transient bacteremia caused by Staphylococcus epidermidis. The pathogens isolated from blood were characterized with regard to antimicrobial susceptibility and formation of biofilms using a static microtiter plate model. Wild type skin isolates from non-hospitalized healthy volunteers served as control with regard to antimicrobial susceptibility and biofilm formation. Results Clinical signs and symptoms, underlying diseases and outcome were not different in either group. However, patients with implant infection had fever over a longer time (mean 12 days versus 3 days, respectively, p & 0.05) and more often positive blood cultures than patients with transient bacteremia (3.1 versus 1.2, p & 0.05). Thrombocytopenia was observed in patients with implant infections but not in patients with transient bacteremia (p & 0.05). Biofilms were formed in 86.4 % of the isolates in implant infection, in 88.8 % in transient bacteremia and in 76.9 % of the isolates from healthy volunteers (not significant). Multi-resistance to penicillin, oxacillin, erythromycin, clindamycin, ciprofloxacin and trimethoprim was more common in the hospital strains than in the wild type strains (75.6 % versus 48.7 %, p & 0.05). Conclusions The clinical features of implant infections are indistinguishable from those of transient bacteremia. Persisting fever and multiple blood culture yielding the growth of skin flora bacteria are strong indicators for infection of implanted material. Biofilm formation and antimicrobial multiresistance, as common in implant infection as in transient bacteremia, seem to be accessory factors in infections due to Staphylococcus epidermidis.
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Affiliation(s)
- E Presterl
- Department of Medicine I, Division of Infectious Diseases, Medical University of Vienna, Vienna, Austria.
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Hentzien M, Strady C, Vernet-Garnier V, Servettaz A, De Champs C, Delmer A, Bani-Sadr F, N'Guyen Y. Prognostic factors associated with 30-day in-hospital mortality in coagulase-negative Staphylococcus bacteraemia: no impact of vancomycin minimum inhibitory concentration. Infect Dis (Lond) 2017; 49:664-673. [PMID: 28490261 DOI: 10.1080/23744235.2017.1323346] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
Abstract
BACKGROUND The impact of a minimum inhibitory concentration (MIC) of vancomycin ≥2 mg/L on mortality and the potential benefit of new antistaphylococcal treatments in coagulase-negative Staphylococcus (CoNS) bacteraemia remain unknown. We assessed the impact of vancomycin MIC on 30-day in-hospital mortality and identified factors independently associated with 30-day in-hospital mortality. METHODS All patients presenting significant CoNS bacteraemia in the university hospital of Reims, between 01 January 2008 and 31 December 2012, were included. Data were retrospectively extracted from the patient records. Vancomycin MIC was assessed using the E-test method, and antimicrobial susceptibility testing was performed in accordance with the recommendations of the Antibiogram Committee of the French Microbiology Society. Cox's Proportional Hazards model was used for multivariate analysis. RESULTS Two hundred and sixty-nine patients (mean age 61.2 ± 15.7 years) were included. Foreign material was present in 92% of patients and 78.4% of isolated methicillin-resistant strains had vancomycin MIC ≥2 mg/l. Thirty-day in-hospital mortality was 16%. There was no association between vancomycin MIC ≥2 mg/l and 30-day in-hospital mortality (adjusted Hazard Ratio (aHR) = .80, 95% confidence interval (95%CI) [.30-2.19], p = .67). Factors independently associated with 30-day in-hospital mortality were age ≥75 vs. ≤60 years (aHR =3.72, 95%CI [1.39-9.97], p = .009), absence of active antibiotic treatment (aHR =5.52, 95%CI [1.13-26.87], p = .03) and acute renal failure (aHR =4.45, 95%CI [2.08-9.56], p < .0001). Removal of an infected device had a protective effect against 30-day in-hospital mortality (aHR = .23, 95%CI [.11-.48], p < .0001). CONCLUSIONS These results suggest that CoNS bacteraemia should be managed by removal of the infected device and antibiotic treatment such as vancomycin.
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Affiliation(s)
- Maxime Hentzien
- a Department of Internal Medicine, Infectious Diseases, and Clinical Immunology , Reims Teaching Hospitals, Robert Debré Hospital , Reims , France.,b EA 3797, Faculty of Medicine , University of Reims Champagne-Ardenne , Reims , France
| | - Christophe Strady
- c Department of Internal Medicine and Infectious diseases , Groupe Courlancy , Reims , France
| | - Véronique Vernet-Garnier
- d Department of Bacteriology, Virology and Hygiene , Reims Teaching Hospitals, Robert Debré Hospital , Reims , France
| | - Amélie Servettaz
- a Department of Internal Medicine, Infectious Diseases, and Clinical Immunology , Reims Teaching Hospitals, Robert Debré Hospital , Reims , France
| | - Christophe De Champs
- d Department of Bacteriology, Virology and Hygiene , Reims Teaching Hospitals, Robert Debré Hospital , Reims , France.,e EA4687 SFR CAP-Santé [FED 4231] , University of Reims Champagne-Ardenne , Reims , France
| | - Alain Delmer
- f Department of Haematology , Reims Teaching Hospitals, Robert Debré Hospital , Reims , France
| | - Firouzé Bani-Sadr
- a Department of Internal Medicine, Infectious Diseases, and Clinical Immunology , Reims Teaching Hospitals, Robert Debré Hospital , Reims , France
| | - Yohan N'Guyen
- a Department of Internal Medicine, Infectious Diseases, and Clinical Immunology , Reims Teaching Hospitals, Robert Debré Hospital , Reims , France
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Yamada K, Namikawa H, Fujimoto H, Nakaie K, Takizawa E, Okada Y, Fujita A, Kawaguchi H, Nakamura Y, Abe J, Kaneko Y, Kakeya H. Clinical Characteristics of Methicillin-resistant Coagulase-negative Staphylococcal Bacteremia in a Tertiary Hospital. Intern Med 2017; 56:781-785. [PMID: 28381743 PMCID: PMC5457920 DOI: 10.2169/internalmedicine.56.7715] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
Objective Coagulase-negative staphylococci are among the most frequently isolated microorganisms in blood cultures. The aim of this study was to assess [1] the clinical characteristics of methicillin-resistant, coagulase-negative staphylococci bacteremia and [2] the susceptibility of the isolated bacteria to glycopeptides. Methods We retrospectively reviewed the medical records of 70 patients from whom methicillin-resistant coagulase-negative staphylococci had been isolated at Osaka City University Hospital between January 2010 and December 2013. We evaluated the patients' background, severity and prognosis of the disease, and the susceptibility of the isolated methicillin-resistant coagulase-negative staphylococci to glycopeptides. Results Out of the 70 patients tested, 28 (40.0%) had leukemia, and 36 (51.4%) had been treated for febrile neutropenia. Infection with Staphylococcus epidermidis accounted for 78.6% of patients. Thirty-nine cases (55.7%) were related to intravascular catheters, and 39 (55.7%) were treated using teicoplanin as a first-line therapy. The 30-day mortality rate was 4.3%. Regarding susceptibility, 20% of all isolates were non-susceptible to teicoplanin. According to multivariate analyses, it was observed that premedication using glycopeptides was independently associated with teicoplanin non-susceptibility (p=0.03; hazard ratio = 5.64; 95% confidence interval, 1.16-26.76). Conclusion Our results suggest that clinicians must use glycopeptides appropriately to prevent the development of further antibiotic resistance in methicillin-resistant coagulase-negative staphylococci.
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Affiliation(s)
- Koichi Yamada
- Department of Infection Control Science, Graduate School of Medicine, Osaka City University, Japan
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Investigation of Glycopeptide Susceptibility of Coagulase-Negative Staphylococci (CoNS) From a Tertiary Care Hospital in Gorgan, Northern Iran. ARCHIVES OF PEDIATRIC INFECTIOUS DISEASES 2016. [DOI: 10.5812/pedinfect.37264] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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Sader HS, Farrell DJ, Flamm RK, Streit JM, Mendes RE, Jones RN. Antimicrobial activity of ceftaroline and comparator agents when tested against numerous species of coagulase-negative Staphylococcus causing infection in US hospitals. Diagn Microbiol Infect Dis 2016; 85:80-4. [PMID: 26971182 DOI: 10.1016/j.diagmicrobio.2016.01.010] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2015] [Revised: 01/12/2016] [Accepted: 01/14/2016] [Indexed: 11/23/2022]
Abstract
A total of 1593 coagulase-negative staphylococci (CoNS) considered clinically significant were collected from 71 US medical centers in 2013-2014 and tested for susceptibility by CLSI broth microdilution methods. Species identification was performed by matrix-assisted laser desorption ionization-time-of-flight mass spectrometry. Overall, 59.7% of isolates were oxacillin resistant (MRCoNS). Ceftaroline (MIC50/90, 0.25/0.5μg/mL) inhibited 99.2% of CoNS at ≤1μg/mL (susceptible breakpoint for Staphylococcus aureus), including 98.7% of MRCoNS, and the highest ceftaroline MIC value was 2μg/mL (13 isolates). Staphylococcus epidermidis represented 60.3% of the CoNS collection and was highly susceptible to ceftaroline (MIC50/90, 0.25/0.5μg/mL, 99.9% inhibited at ≤1μg/mL). All isolates of Staphylococcus capitis, Staphylococcus caprae, Staphylococcus hominis, Staphylococcus lugdunensis, Staphylococcus pettenkoferi, Staphylococcus simulans, and Staphylococcus warneri (MIC50/90, 0.06-0.25/0.25-0.5μg/mL) were inhibited at ceftaroline MIC of ≤1μg/mL. Staphylococcus haemolyticus represented only 4.8%, was atypically less susceptible to ceftaroline (MIC50/90, 0.5/2μg/mL, 87.0% inhibited at ≤1μg/mL), and accounted for 76.9% (10/13) of isolates with ceftaroline MIC >1μg/mL.
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Species distribution and antimicrobial resistance pattern of Coagulase-negative Staphylococci at a tertiary care centre. Med J Armed Forces India 2015; 72:71-4. [PMID: 26900227 DOI: 10.1016/j.mjafi.2014.12.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2014] [Accepted: 12/05/2014] [Indexed: 11/23/2022] Open
Abstract
BACKGROUND Coagulase-negative Staphylococci (CoNS), previously dismissed at contaminants, have now emerged as an important cause of nosocomial infections especially in patients with implants and prosthetic devices. They are a well-known cause of bloodstream infections, urinary tract infections, wound infections, prosthetic valve endocarditis and eye infections. This study was conducted with an aim to identify CoNS at the species level from various clinical samples and determine the antimicrobial resistance pattern of these isolates. METHODS This cross sectional study was carried out from September 2011 to February 2014 in which 150 non-repetitive clinical isolates of CoNS were identified at the species level by conventional phenotypic methods. Complete antimicrobial susceptibility profile was also determined by Kirby Bauer disc diffusion method. Susceptibility testing to vancomycin was done by E-test method. RESULTS Only three species of CoNS were isolated, the most common being Staphylococcusepidermidis (60%) followed by Staphylococcussaprophyticus (27.3%) and Staphylococcushemolyticus (12.7%). Most S. epidermidis were isolated from blood and intravascular catheter tip samples, whereas all S. saprophyticus were isolated from urine samples of female patients. All isolates were found to be resistant to penicillin, but were susceptible to glycopeptides and linezolid and showed variable resistance to fluoroquinolones, aminoglycosides and macrolides. CONCLUSION CoNS are emerging nosocomial pathogens and should not always be overlooked as contaminants. However, growth of CoNS from blood cultures and intravascular catheter tips should be clinically correlated and carefully interpreted. As many CoNS strains exhibit drug resistance, antimicrobial susceptibility profile should be determined prior to treatment of these infections.
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Abstract
The definition of the heterogeneous group of coagulase-negative staphylococci (CoNS) is still based on diagnostic procedures that fulfill the clinical need to differentiate between Staphylococcus aureus and those staphylococci classified historically as being less or nonpathogenic. Due to patient- and procedure-related changes, CoNS now represent one of the major nosocomial pathogens, with S. epidermidis and S. haemolyticus being the most significant species. They account substantially for foreign body-related infections and infections in preterm newborns. While S. saprophyticus has been associated with acute urethritis, S. lugdunensis has a unique status, in some aspects resembling S. aureus in causing infectious endocarditis. In addition to CoNS found as food-associated saprophytes, many other CoNS species colonize the skin and mucous membranes of humans and animals and are less frequently involved in clinically manifested infections. This blurred gradation in terms of pathogenicity is reflected by species- and strain-specific virulence factors and the development of different host-defending strategies. Clearly, CoNS possess fewer virulence properties than S. aureus, with a respectively different disease spectrum. In this regard, host susceptibility is much more important. Therapeutically, CoNS are challenging due to the large proportion of methicillin-resistant strains and increasing numbers of isolates with less susceptibility to glycopeptides.
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Affiliation(s)
- Karsten Becker
- Institute of Medical Microbiology, University Hospital Münster, Münster, Germany
| | - Christine Heilmann
- Institute of Medical Microbiology, University Hospital Münster, Münster, Germany
| | - Georg Peters
- Institute of Medical Microbiology, University Hospital Münster, Münster, Germany
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Genetic analysis of glycopeptide-resistant Staphylococcus epidermidis strains from bone and joint infections. J Clin Microbiol 2012; 51:1014-9. [PMID: 23269734 DOI: 10.1128/jcm.02608-12] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Glycopeptide-resistant Staphylococcus epidermidis (GRSE) strains are of increasing concern in bone and joint infections (BJIs). Using multilocus sequence typing and multilocus variable-number tandem repeat analysis, we show that BJI-associated GRSE strains are genetically diverse but arise from related, multiresistant hospital sequence types (STs), mostly ST2, ST5, and ST23.
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Glycopeptide resistance in gram-positive cocci: a review. Interdiscip Perspect Infect Dis 2012; 2012:781679. [PMID: 22778729 PMCID: PMC3388329 DOI: 10.1155/2012/781679] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2012] [Revised: 04/16/2012] [Accepted: 04/30/2012] [Indexed: 02/01/2023] Open
Abstract
Vancomycin-resistant enterococci (VRE) have emerged as important nosocomial pathogens in the past two decades all over the world and have seriously limited the choices available to clinicians for treating infections caused by these agents. Methicillin-resistant Staphylococcus aureus, perhaps the most notorious among the nosocomial pathogens, was till recently susceptible to vancomycin and the other glycopeptides. Emergence of vancomycin nonsusceptible strains of S. aureus has led to a worrisome scenario where the options available for treating serious infections due to these organisms are very limited and not well evaluated. Vancomycin resistance in clinically significant isolates of coagulase-negative staphylococci is also on the rise in many setups. This paper aims to highlight the genetic basis of vancomycin resistance in Enterococcus species and S. aureus. It also focuses on important considerations in detection of vancomycin resistance in these gram-positive bacteria. The problem of glycopeptide resistance in clinical isolates of coagulase-negative staphylococci and the phenomenon of vancomycin tolerance seen in some strains of Streptococcus pneumoniae has also been discussed. Finally, therapeutic options available and being developed against these pathogens have also found a mention.
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Sader HS, Jones RN. Antimicrobial activity of daptomycin in comparison to glycopeptides and other antimicrobials when tested against numerous species of coagulase-negative Staphylococcus. Diagn Microbiol Infect Dis 2012; 73:212-4. [DOI: 10.1016/j.diagmicrobio.2012.02.005] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2012] [Accepted: 02/13/2012] [Indexed: 10/28/2022]
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Ma XX, Wang EH, Liu Y, Luo EJ. Antibiotic susceptibility of coagulase-negative staphylococci (CoNS): emergence of teicoplanin-non-susceptible CoNS strains with inducible resistance to vancomycin. J Med Microbiol 2011; 60:1661-1668. [DOI: 10.1099/jmm.0.034066-0] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Affiliation(s)
- Xiao Xue Ma
- Department of Medical Microbiology and Parasitology, College of Basic Medical Sciences, China Medical University, Shenyang, PR China
| | - En Hua Wang
- Institute of Pathology and Pathophysiology, China Medical University, Shenyang, PR China
| | - Yong Liu
- Department of Clinical Microbiology, Second Affiliated Hospital of China Medical University, Shenyang, PR China
| | - En Jie Luo
- Department of Medical Microbiology and Parasitology, College of Basic Medical Sciences, China Medical University, Shenyang, PR China
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Ma XX, Sun DD, Hu J, Wang EH, Luo EJ. Epidemiological and molecular characterization ofStaphylococcus haemolyticusstrains, from a hematology ward, with decreased susceptibility to glycopeptides. Can J Microbiol 2011; 57:476-84. [DOI: 10.1139/w11-033] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In the present study, we report on the reduced susceptibility to teicoplanin among clinical isolates of Staphylococcus haemolyticus in a hematology ward of a teaching hospital. The molecular characterization of 17 S. haemolyticus strains was performed using mec gene complex classification, pulsed-field gel electrophoresis analysis, and minimum inhibitory concentration examination. Pulsotype A strains carrying a class C2 mec gene complex were the most prevalent strains, at 64.7%. In vivo selection of stepwise increase in resistance to vancomycin and teicoplanin was observed in three S. haemolyticus strains serially isolated from a case patient. The results of the present study suggest the regional spread of certain S. haemolyticus clones with diminished susceptibility to glycopeptides, emphasizing the need for continuous monitoring of minimum inhibitory concentration levels of vancomycin and teicoplanin in S. haemolyticus strains, and the importance of infection control practices to prevent its transmission.
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Affiliation(s)
- Xiao Xue Ma
- Department of Medical Microbiology and Parasitology, College of Basic Medical Sciences, China Medical University, No. 92, North 2-Road, Heping District, Shenyang 110001, People’s Republic of China
| | - Dan Dan Sun
- Department of Medical Microbiology and Parasitology, College of Basic Medical Sciences, China Medical University, No. 92, North 2-Road, Heping District, Shenyang 110001, People’s Republic of China
| | - Jian Hu
- Department of Medical Microbiology and Parasitology, College of Basic Medical Sciences, China Medical University, No. 92, North 2-Road, Heping District, Shenyang 110001, People’s Republic of China
| | - En Hua Wang
- Institute of Pathology and Pathophysiology, China Medical University, Shenyang, People’s Republic of China
| | - En Jie Luo
- Department of Medical Microbiology and Parasitology, College of Basic Medical Sciences, China Medical University, No. 92, North 2-Road, Heping District, Shenyang 110001, People’s Republic of China
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Glycopeptide resistance in coagulase-negative staphylococci isolated in blood cultures from patients with hematological malignancies during three decades. Eur J Clin Microbiol Infect Dis 2011; 30:1349-54. [PMID: 21744039 DOI: 10.1007/s10096-011-1228-8] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2010] [Accepted: 03/13/2011] [Indexed: 10/18/2022]
Abstract
The aim of this study was to determine if there was a long-term increase in glycopeptide minimum inhibitory concentration (MIC) values, MIC creep, among bloodstream isolates of Staphylococcus epidermidis and S. haemolyticus isolated from patients with hematological malignancies. We conducted a retrospective single-center study where all positive blood cultures of S. epidermidis (n = 387) and S. haemolyticus (n = 19) isolated from patients with hematological malignancies during three decades, 1980 to 2009, were re-evaluated for the presence of reduced susceptibility to vancomycin and teicoplanin. Three different methods for the detection of reduced susceptibility to glycopeptides were used; standard Etest, macromethod Etest, and glycopeptide resistance detection (GRD) Etest. The median MIC value for vancomycin was 2 mg/L. MIC values for vancomycin and teicoplanin did not show any statistically significant increase during the study period. The presence of heterogeneously glycopeptide-intermediate staphylococci (hGIS) was analyzed among 405 coagulase-negative staphylococci (CoNS) isolates. hGIS were found in 31-45% of the CoNS isolates by the macromethod Etest and in 53-67% by the GRD Etest during the three decades. In conclusion, we did not observe any long-term glycopeptide MIC creep determined by the standard Etest, although a high and increasing proportion of heterogeneous vancomycin resistance was observed.
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Kristóf K, Kocsis E, Szabó D, Kardos S, Cser V, Nagy K, Hermann P, Rozgonyi F. Significance of methicillin–teicoplanin resistant Staphylococcus haemolyticus in bloodstream infections in patients of the Semmelweis University hospitals in Hungary. Eur J Clin Microbiol Infect Dis 2011; 30:691-9. [DOI: 10.1007/s10096-010-1142-5] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2010] [Accepted: 12/20/2010] [Indexed: 11/24/2022]
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Vancomycin MIC for methicillin-resistant coagulase-negative Staphylococcus isolates: evaluation of the broth microdilution and Etest methods. J Clin Microbiol 2010; 48:4652-4. [PMID: 20861345 DOI: 10.1128/jcm.01182-10] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Vancomycin MIC results were determined by the broth microdilution (BMD) method and by Etest using 130 methicillin-resistant coagulase-negative staphylococcus bloodstream isolates obtained from a tertiary hospital. The majority (98.5%) of MIC results determined by BMD were ≤1 μg/ml, in contrast to MIC results determined by Etest (72.3% were ≥1.5 μg/ml). The MICs obtained by Etest were, in general, 1- to 2-fold higher than the MICs obtained by BMD.
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Decreased susceptibility to teicoplanin and vancomycin in coagulase-negative Staphylococci isolated from orthopedic-device-associated infections. J Clin Microbiol 2010; 48:1428-31. [PMID: 20164270 DOI: 10.1128/jcm.02098-09] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
We studied 315 coagulase-negative Staphylococcus strains recovered prospectively during 240 surgical procedures (206 subjects) from proven or suspected device-associated bone and joint infections. Sixteen strains (5.1%) had decreased susceptibility to glycopeptides: 15 (12 S. epidermidis strains, 2 S. capitis strains, and 1 S. haemolyticus strain) to teicoplanin alone (MIC of 16 mg/liter, n = 9; MIC of 32 mg/liter, n = 6) and one (S. epidermidis) to both teicoplanin and vancomycin (MIC, 16 and 8 mg/liter, respectively). Decreased susceptibility to teicoplanin was more prevalent in "infecting" strains (i.e., strains recovered from >/=2 distinct intraoperative samples) than in "contaminants" (i.e., strains not fulfilling this criterion) (8.1% [12/149] versus 2.4% [4/166], respectively [P = 0.022]). One hundred percent (13/13) of S. epidermidis strains with decreased susceptibility to teicoplanin were resistant to methicillin (versus 112/173 [64.7%] for S. epidermidis strains susceptible to teicoplanin; P = 0.021).
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Comparative efficacy and safety of vancomycin versus teicoplanin: systematic review and meta-analysis. Antimicrob Agents Chemother 2009; 53:4069-79. [PMID: 19596875 DOI: 10.1128/aac.00341-09] [Citation(s) in RCA: 182] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Vancomycin and teicoplanin are the glycopeptides currently in use for the treatment of infections caused by invasive beta-lactam-resistant gram-positive organisms. We conducted a systematic review and meta-analysis of randomized controlled trials that have compared vancomycin and teicoplanin administered systemically for the treatment of suspected or proven infections. A comprehensive search of trials without year, language, or publication status restrictions was performed. The primary outcome was all-cause mortality. Two reviewers independently extracted the data. Risk ratios (RRs) with 95% confidence intervals (CIs) were pooled by using the fixed-effect model (RRs of >1 favor vancomycin). Twenty-four trials were included. All-cause mortality was similar overall (RR, 0.95; 95% CI, 0.74 to 1.21), and there was no significant heterogeneity. In trials that used adequate allocation concealment, the results favored teicoplanin (RR, 0.82; 95% CI, 0.63 to 1.06), while in trials with unknown methods or inadequate concealment, the results favored vancomycin (RR, 3.61; 95% CI, 1.27 to 10.30). The latter trials might have recruited more severely ill patients. No other variable affected the RRs for mortality, including the assessment of glycopeptides administered empirically or for proven infections, neutropenia, the participant's age, and drug dosing. There were no significant differences between teicoplanin and vancomycin with regard to clinical failure (RR, 0.92; 95% CI, 0.81 to 1.05), microbiological failure (RR, 1.24; 95% CI, 0.93 to 1.65), and other efficacy outcomes. Lower RRs (in favor of teicoplanin) for clinical failure were observed with a lower risk of bias and when treatment was initiated for infections caused by gram-positive organisms rather than empirically. Total adverse events (RR, 0.61; 95% CI, 0.50 to 0.74), nephrotoxicity (RR, 0.44; 95% CI, 0.32 to 0.61), and red man syndrome were significantly less frequent with teicoplanin. Teicoplanin is not inferior to vancomycin with regard to efficacy and is associated with a lower adverse event rate than vancomycin.
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Cerceo E, Lautenbach E, Linkin DR, Bilker WB, Lee I. Role of matching in case-control studies of antimicrobial resistance. Infect Control Hosp Epidemiol 2009; 30:479-83. [PMID: 19335226 DOI: 10.1086/597061] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Of 57 case-control studies of antimicrobial resistance, matching was used in 23 (40%). Matched variables differed substantially across studies. Of these 23 matched case-control studies, 12 (52%) justified the use of matching, and 9 (39%) noted the strengths or limitations of this approach. Analysis that accounted for matching was performed in only 52% of the case-control studies.
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Affiliation(s)
- Elizabeth Cerceo
- Division of Infectious Diseases, Department of Medicine, School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
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Cimiotti JP, Haas JP, Della-Latta P, Wu F, Saiman L, Larson EL. Prevalence and clinical relevance of Staphylococcus warneri in the neonatal intensive care unit. Infect Control Hosp Epidemiol 2007; 28:326-30. [PMID: 17326024 PMCID: PMC1995750 DOI: 10.1086/511998] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2005] [Accepted: 12/08/2005] [Indexed: 11/03/2022]
Abstract
OBJECTIVE To describe the prevalence of Staphylococcus warneri on the hands of nurses and the clinical relevance of this organism among neonates in the neonatal intensive care unit (NICU). DESIGN Prospective cohort study that examined the microbial flora on the hands of nurses and clinical isolates recovered from neonates during a 23-month period (March 1, 2001, through January 31, 2003). SETTING Two high-risk NICUs in New York City. PARTICIPANTS All neonates hospitalized in the NICUs for more than 24 hours and all full-time nurses from the same NICUs who volunteered to participate. INTERVENTION At baseline and then every 3 months, samples for culture were obtained from each nurse's cleaned dominant hand. Pulsed-field electrophoresis compared S. warneri isolates from neonates and staff. RESULTS Samples for culture (n=834) were obtained from the hands of 119 nurses; 520 (44%) of the 1,195 isolates of coagulase-negative staphylococci recovered were identified as S. warneri. Of the 647 clinically relevant isolates recovered from neonates, 17 (8%) of the 202 isolates that were identified to species level were S. warneri. Pulsed-field electrophoresis revealed a common strain of S. warneri that was shared among the nurses and neonates. Furthermore, 117 (23%) of 520 S. warneri isolates from nurses' hands had minimum inhibitory concentrations for vancomycin of 4 mu g/mL, which indicate decreasing susceptibility. CONCLUSIONS Our findings that S. warneri can be pathogenic in neonates, is a predominant species of coagulase-negative staphylococci cultured from the hands of nurses, and has decreased vancomycin susceptibility underscore the importance of continued surveillance for vancomycin resistance and pathogenicity in pediatric care settings.
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Affiliation(s)
- Jeannie P Cimiotti
- Center for Health Outcomes and Policy Research, Philadelphia, PA 19104, USA.
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Trueba F, Garrabe E, Hadef R, Fabre R, Cavallo JD, Tsvetkova K, Chesneau O. High prevalence of teicoplanin resistance among Staphylococcus epidermidis strains in a 5-year retrospective study. J Clin Microbiol 2006; 44:1922-3. [PMID: 16672444 PMCID: PMC1479201 DOI: 10.1128/jcm.44.5.1922-1923.2006] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Finegold SM, Molitoris D, Vaisanen ML, Song Y, Liu C, Bolaños M. In vitro activities of OPT-80 and comparator drugs against intestinal bacteria. Antimicrob Agents Chemother 2005; 48:4898-902. [PMID: 15561877 PMCID: PMC529236 DOI: 10.1128/aac.48.12.4898-4902.2004] [Citation(s) in RCA: 100] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The activities of OPT-80 against 453 intestinal bacteria were compared with those of seven other drugs. OPT-80 showed good activity against most clostridia, staphylococci, and enterococci, but streptococci, aerobic and facultative gram-negative rods, anaerobic gram-negative rods, and Clostridium ramosum were resistant. Poor activity against anaerobic gram-negative rods may maintain colonization resistance.
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Affiliation(s)
- Sydney M Finegold
- Medical Service, VA Greater Los Angeles Healthcare System, Los Angeles, California, USA.
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Bertin M, Muller A, Bertrand X, Cornette C, Thouverez M, Talon D. Relationship between glycopeptide use and decreased susceptibility to teicoplanin in isolates of coagulase-negative staphylococci. Eur J Clin Microbiol Infect Dis 2004; 23:375-9. [PMID: 15112071 DOI: 10.1007/s10096-004-1129-1] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
To investigate the relationship between glycopeptide use and decreased susceptibility to teicoplanin in coagulase-negative staphylococci (CNS) isolates, data on teicoplanin susceptibility and glycopeptide use from existing microbiology laboratory and pharmacy databases were collected for the period between July 2000 and March 2001. Pooled data for the entire study period were first used to analyse associations. Univariate analysis showed that the incidence of CNS with decreased susceptibility to teicoplanin was significantly correlated with the use of glycopetides, particularly with vancomycin use. This association was confirmed by multivariate analysis. This study suggests that variations in antimicrobial resistance are related to variations in antimicrobial use in the model of CNS with decreased susceptibility to teicoplanin, thus confirming the usefulness of restricting antimicrobial prescribing as a means of controlling resistance.
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Affiliation(s)
- M Bertin
- Service d'Hygiène Hospitalière et d'Epidémiologie Moléculaire, CHU Jean Minjoz, 25030 Besançon, France
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Bergeret M, Boutros N, Raymond J. In vitro combined bactericidal activity of cefpirome and glycopeptides against glycopeptides and oxacillin-resistant staphylococci. Int J Antimicrob Agents 2004; 23:247-53. [PMID: 15164965 DOI: 10.1016/j.ijantimicag.2003.08.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2003] [Accepted: 08/05/2003] [Indexed: 11/17/2022]
Abstract
Infections caused by coagulase-negative staphylococci are becoming increasingly important, particularly those of nosocomial origin, as the organisms are frequently multi-resistant. New antimicrobial strategies are needed. The bactericidal activity of a combination of cefpirome with either vancomycin or teicoplanin against 12 strains of methicillin-resistant staphylococci with a decreased susceptibility to teicoplanin was determined in vitro by a time killing method. Strains Mu3 and Mu50 of Staphylococcus aureus were also studied. Cefpirome (0.125-0.5 x MIC) combined with vancomycin (0.25-1 x MIC) or teicoplanin (0.125-1 x MIC) acted synergically against 12 isolates over 18 h in most cases. A synergistic killing effect was also observed with the Mu3 and Mu50 strains of glycopeptide-intermediate S. aureus but over a longer period.
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Affiliation(s)
- M Bergeret
- Service Microbiologie, Hôpital Saint Vincent de Paul, 82, Avenue Denfert Rochereau 75014, Université Paris V, Paris, France
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Center KJ, Reboli AC, Hubler R, Rodgers GL, Long SS. Decreased vancomycin susceptibility of coagulase-negative staphylococci in a neonatal intensive care unit: evidence of spread of Staphylococcus warneri. J Clin Microbiol 2004; 41:4660-5. [PMID: 14532199 PMCID: PMC254305 DOI: 10.1128/jcm.41.10.4660-4665.2003] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Coagulase-negative staphylococci (CoNS) are important pathogens in premature neonates; decreasing glycopeptide susceptibility has been observed among these isolates. The epidemiology of colonization with CoNS, the organisms' vancomycin susceptibilities, and genetic relatedness were studied over 6 months in a tertiary-care neonatal unit. A total of 321 isolates of CoNS were isolated. Seventy-five percent of the infants were colonized at admission, and virtually all were colonized thereafter. Common species were Staphylococcus epidermidis (69%), S. warneri (12%), S. haemolyticus (9.7%), and S. hominis (5.6%). A total of 3.9% of CoNS isolates had decreased vancomycin susceptibility (DVS) (MICs > 2.0 microg/ml); isolate recovery was associated with a stay in a neonatal intensive care unit for >28 days (P = 0.039), vancomycin exposure (P = 0.021), and S. warneri colonization (P < 0.0001). Nine of 12 (75%) CoNS with DVS were S. warneri, had enhanceable high-level resistance in vitro, were indistinguishable or closely related by pulsed-field gel electrophoresis, and were different from 29 vancomycin-susceptible S. warneri isolates. Epidemiological analysis suggested unsuspected nosocomial spread. Species determination in certain settings may aid in the understanding of emerging nosocomial problems.
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Affiliation(s)
- Kimberly J Center
- St. Christopher's Hospital for Children, Drexel University College of Medicine, Philadelphia, Pennsylvania 19134, USA.
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Abstract
Antibiotics are essential to the treatment of bacterial sepsis as they reduce the bacterial burden. The impact of bacterial resistance has recently been studied and found to be important in a range of conditions. Resistance to antibiotics can be defined genotypically, phenotypically and clinically through pharmacokinetic/pharmacodynamic studies and their correlations with clinical outcomes. Although the kinetics of antibiotics has been shown to be favourably altered in sepsis, a range of studies in sepsis has revealed that for most pathogens resistance contributes to significant increases in mortality. This has been clearly demonstrated in bacteraemia, including community- and hospital-acquired infection, and with bacteraemia caused by vancomycin-resistant enterococci, methicillin-resistant staphylococci and extended-spectrum producing Gram-negative bacteria. Significant mortality increases have also been seen with ventilator-associated pneumonia and serious infections requiring admission to intensive care. Gentotypic and phenotypic resistance in coagulase-negative staphylococci causing bacteraemia, and in invasive pneumococcal disease has not shown differences in mortality. In the latter case, dosage regimens have to date been adequate to overcome laboratory-defined resistance. Early indications are that de-escalating therapy from broad-spectrum initial coverage after results of cultures and susceptibility tests become available does not jeopardize outcomes, and further prospective studies are warranted. There is now convincing evidence that broad-spectrum initial therapy to cover the likely pathogens and their resistances pending culture results is mandatory in sepsis to minimize adverse outcomes.
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Affiliation(s)
- John Turnidge
- Women's and Children's Hospital, North Adelaide, South Australia, Australia.
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Tacconelli E, D'Agata EMC, Karchmer AW. Epidemiological comparison of true methicillin-resistant and methicillin-susceptible coagulase-negative staphylococcal bacteremia at hospital admission. Clin Infect Dis 2003; 37:644-9. [PMID: 12942394 DOI: 10.1086/377207] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2003] [Accepted: 04/14/2003] [Indexed: 11/03/2022] Open
Abstract
We performed 2 case-control studies among 108 patients with true coagulase-negative staphylococcal (CoNS) bacteremia diagnosed within 48 h of hospital admission. Seventy-nine patients (73%) with methicillin-resistant (MR) CoNS bacteremia and 29 patients (27%) with methicillin-susceptible (MS) CoNS bacteremia were compared with 79 randomly selected control patients without CoNS bacteremia. The presence of a central venous catheter was an independent risk factor for both MR- and MS-CoNS bacteremia (P<.001). Patients with MR-CoNS bacteremia were more frequently admitted from health care facilities (P=.02), more likely to have had previous MR Staphylococcus aureus infection or colonization (P=.02), and more likely to have received antibiotics in the previous 30 days (P=.02). The probability that bacteremia was caused by an MR strain, rather than an MS strain, was 62% among patients admitted from the community and 84% among patients admitted from health care facilities. This study identified epidemiological characteristics that can be used to distinguish between MR- and MS-CoNS bacteremia and found high rates of methicillin resistance among CoNS isolates recovered from patients admitted from the community, as well as from health care facilities.
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Affiliation(s)
- Evelina Tacconelli
- Beth Israel Deaconess Medical Center and Division of Infectious Diseases, Harvard Medical School, Boston, Massachusetts 02215, USA.
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