Abstract:
:The molecular mechanisms and characteristics of rifampicin (RIF) resistance in Staphylococcus epidermidis are poorly characterised, even though S. epidermidis is one of the most common nosocomial pathogens associated with indwelling medical device-related infections. The aim of this study was to investigate the evolution of RIF resistance and to characterise the associated molecular mechanisms in S. epidermidis. RIF-resistant mutants from two RIF-susceptible S. epidermidis strains (RP62A and IDRL-8883) were selected through in vitro and in vivo exposure to RIF. A total of 16 colonies with an RP62A background and 63 colonies with an IDRL-8883 background were analysed for rpoB mutations. The fitness of RIF-susceptible and isogenic RIF-resistant strains was assessed using a paired competition assay and by comparing generation times. All mutations detected were in cluster I of rpoB. The following five amino acid substitutions were selected in vitro: Asp471→Asn; Asp471→Gly; Asp471→Val; Ser486→Tyr; and His481→Tyr. The following three amino acid substitutions were selected in vivo: His481→Tyr; Gln468→Lys; and Ser486→Phe. Asp471→Asn and Asp471→Gly changes were associated with susceptible minimal inhibitory concentrations (MICs). In vitro competition assays revealed that all RIF-resistant mutants other than Ser486→Tyr and Ser486→Phe had a relative fitness of <1.0. His481→Tyr mutations had their own specific fitness costs and effects on growth rate, irrespective of strain background. In conclusion, the current study presents molecular characterisations and fitness costs of several rpoB mutations in S. epidermidis.
journal_name
Int J Antimicrob Agentsjournal_title
International journal of antimicrobial agentsauthors
Wi YM,Greenwood-Quaintance KE,Brinkman CL,Lee JYH,Howden BP,Patel Rdoi
10.1016/j.ijantimicag.2017.12.019subject
Has Abstractpub_date
2018-05-01 00:00:00pages
670-677issue
5eissn
0924-8579issn
1872-7913pii
S0924-8579(17)30453-3journal_volume
51pub_type
杂志文章abstract::Amphotericin B is a powerful polyene antifungal drug used for treating systemic fungal infections and is usually administered for a short period. Side effects after prolonged use are unknown in humans. Here we report the case of a 28-year-old man suffering from chronic granulomatous disease (CGD), treated for invasive...
journal_title:International journal of antimicrobial agents
pub_type: 杂志文章
doi:10.1016/j.ijantimicag.2014.02.015
更新日期:2014-06-01 00:00:00
abstract::Vancomycin is a glycopeptide antibiotic widely used in the management of meticillin-resistant Staphylococcus aureus (MRSA). Guidelines currently recommend vancomycin be administered by intermittent infusion, despite recent research suggesting that continuous infusion (CI) may be associated with lower rates of vancomyc...
journal_title:International journal of antimicrobial agents
pub_type: 杂志文章,meta分析,评审
doi:10.1016/j.ijantimicag.2015.04.013
更新日期:2015-09-01 00:00:00
abstract::In this study, the in vitro activity of tigecycline against 1140 enterococci collected from humans, food products, animals and the environment in Portugal (1996-2008) was analysed. Ten isolates (seven Enterococcus faecalis and three Enterococcus spp.) non-susceptible to tigecycline (minimum inhibitory concentrations o...
journal_title:International journal of antimicrobial agents
pub_type: 杂志文章
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更新日期:2011-08-01 00:00:00
abstract:BACKGROUND:Fluoroquinolones (FQs) are second-line antimicrobial agents. Once the decision to prescribe an antimicrobial is made, the choice of antimicrobial should be based on both the benefits and adverse effects. This systematic review quantifies the occurrence of common adverse events (AEs) related to FQs in relatio...
journal_title:International journal of antimicrobial agents
pub_type: 杂志文章,meta分析
doi:10.1016/j.ijantimicag.2018.04.014
更新日期:2018-11-01 00:00:00
abstract:INTRODUCTION:Tazobactam-piperacillin (TZP) is a mixture of a broad-spectrum penicillin and an irreversible β-lactamase inhibitor. TZP is effective against Gram-negative bacteria that produce extended-spectrum β-lactamases, and it is used as a first-line or second-line drug to treat serious infections. METHODS:This stu...
journal_title:International journal of antimicrobial agents
pub_type: 杂志文章
doi:10.1016/j.ijantimicag.2020.105919
更新日期:2020-04-01 00:00:00
abstract::Because few data exist on the effect of recombinant human erythropoietin (EPO) for anemia not induced by zidovudine (ZDV) in persons with AIDS, we analyzed a subset of 523 subjects not taking ZDV ('non-ZDV') who participated in an open-label EPO treatment program involving 1943 subjects. Non-ZDV subjects had a mean he...
journal_title:International journal of antimicrobial agents
pub_type: 杂志文章
doi:10.1016/s0924-8579(97)00371-3
更新日期:1997-01-01 00:00:00
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journal_title:International journal of antimicrobial agents
pub_type: 杂志文章
doi:10.1016/j.ijantimicag.2017.11.013
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abstract::The pharmacokinetic profiles of single and repeated oral doses of telithromycin 800 mg/day were compared in patients with hepatic impairment and healthy subjects in two open-label, non-randomized, parallel-group, multicentre studies. The maximal plasma concentrations (Cmax) and the area under the plasma concentration-...
journal_title:International journal of antimicrobial agents
pub_type: 临床试验,杂志文章,多中心研究
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journal_title:International journal of antimicrobial agents
pub_type: 杂志文章,评审
doi:10.1016/s0924-8579(98)00077-6
更新日期:1999-08-01 00:00:00
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journal_title:International journal of antimicrobial agents
pub_type: 杂志文章
doi:10.1016/j.ijantimicag.2020.106146
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journal_title:International journal of antimicrobial agents
pub_type: 杂志文章,评审
doi:10.1016/s0924-8579(01)00310-7
更新日期:2001-05-01 00:00:00
abstract::Recent basic and clinical research efforts have shed more light on the taxonomy, microbiology, epidemiology, antimicrobial susceptibility and treatment of Bacteroides, Prevotella, and Porphyromonas species. Of all anaerobic bacteria, Bacteroides is the most frequently isolated pathogen from clinical specimens, includi...
journal_title:International journal of antimicrobial agents
pub_type: 杂志文章,评审
doi:10.1016/s0924-8579(99)00164-8
更新日期:2000-06-01 00:00:00
abstract::Increases in the prevalence of yeast species other than C. albicans as agents of disseminated mycoses in immunosuppressed patients and of fluconazole-resistant C. albicans isolates from patients infected with HIV indicate changes in the epidemiology of Candida infections. The precise reasons for alterations in prevale...
journal_title:International journal of antimicrobial agents
pub_type: 杂志文章
doi:10.1016/0924-8579(95)00049-6
更新日期:1996-02-01 00:00:00
abstract::While most Entamoeba histolytica appearing in male homosexuals infected with human immunodeficiency virus (HIV) is considered non-invasive in Western countries, and treatment of amebiasis in these persons has received very little attention, in Japan some male homosexual amebiasis patients infected with HIV complain of...
journal_title:International journal of antimicrobial agents
pub_type: 杂志文章
doi:10.1016/s0924-8579(96)00327-5
更新日期:1996-10-01 00:00:00
abstract::Bumped kinase inhibitors (BKIs) are effective against a variety of apicomplexan parasites. Fifteen BKIs with promising in vitro efficacy against Neospora caninum tachyzoites, low cytotoxicity in mammalian cells, and no toxic effects in non-pregnant BALB/c mice were assessed in pregnant mice. Drugs were emulsified in c...
journal_title:International journal of antimicrobial agents
pub_type: 杂志文章
doi:10.1016/j.ijantimicag.2020.106099
更新日期:2020-09-01 00:00:00
abstract::Mutants with oxazolidinone MICs, 2- to 16-fold higher than those of parents, were selected from two of five clinical isolates of Enterococcus faecalis during exposure to AZD2563, but only at frequencies of ca. 10(-8). Resistance was not selected in Enterococcus faecium, Staphylococcus aureus or coagulase-negative stap...
journal_title:International journal of antimicrobial agents
pub_type: 杂志文章
doi:10.1016/j.ijantimicag.2003.06.004
更新日期:2004-01-01 00:00:00
abstract::A recent report identified significant reductions or disappearance of viral load in COVID-19 patients given a combination of hydroxychloroquine and azithromycin. The present communication discusses some common pharmacokinetic properties of these two drugs that may be linked to a potential underlying mechanism of actio...
journal_title:International journal of antimicrobial agents
pub_type: 杂志文章
doi:10.1016/j.ijantimicag.2020.106007
更新日期:2020-06-01 00:00:00
abstract:OBJECTIVES:This study aimed to report the results of SARS-CoV-2 PCR-based screening campaigns conducted on dependent elderly residents (compared with staff members) in long-term care facilities (LTCFs) in Marseille, France, and the follow-up of positive cases. METHODS:Data from 1691 elderly residents and 1000 members ...
journal_title:International journal of antimicrobial agents
pub_type: 杂志文章
doi:10.1016/j.ijantimicag.2020.106219
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abstract::Citrobacter freundii strain 4306 was isolated from a urine specimen of a patient in March 2006 in Palestine. This strain showed a unique multidrug resistance phenotype, as it was resistant both to 7-alpha-methoxy- and oxyimino-cephalosporins, including cefepime, cefpirome and monobactams, in addition to quinolones, st...
journal_title:International journal of antimicrobial agents
pub_type: 杂志文章
doi:10.1016/j.ijantimicag.2008.04.019
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journal_title:International journal of antimicrobial agents
pub_type: 杂志文章,评审
doi:10.1016/j.ijantimicag.2006.03.019
更新日期:2006-06-01 00:00:00
abstract:PURPOSE:Infective endocarditis (IE) is a severe infection, and a leading cause of mortality and morbidity. Due to its favourable microbiological and pharmacological characteristics, daptomycin is routinely used in clinical practice for treating IE. METHODS:A prospective study was conducted at a large tertiary-care hos...
journal_title:International journal of antimicrobial agents
pub_type: 杂志文章
doi:10.1016/j.ijantimicag.2019.08.011
更新日期:2019-10-01 00:00:00
abstract::Photobacterium damselae subsp. piscicida, a causative agent of pseudotuberculosis, often harbours resistance plasmids (R plasmids) that facilitate horizontal gene transfer of drug resistance genes. R plasmid pP9014 was isolated from P. damselae subsp. piscicida and its complete nucleotide sequence was determined using...
journal_title:International journal of antimicrobial agents
pub_type: 杂志文章
doi:10.1016/j.ijantimicag.2013.02.027
更新日期:2013-07-01 00:00:00
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journal_title:International journal of antimicrobial agents
pub_type: 杂志文章
doi:10.1016/j.ijantimicag.2012.05.025
更新日期:2012-10-01 00:00:00
abstract::No standard definition exists for the term, complicated urinary tract infection. The term is usually used to convey an infection that occurs in a host with altered defenses or in a patient with a structural or functional abnormality impeding urine flow. Therapy of complicated infections represents a greater challenge ...
journal_title:International journal of antimicrobial agents
pub_type: 杂志文章
doi:10.1016/0924-8579(94)90045-0
更新日期:1994-06-01 00:00:00
abstract::Candida auris is an emerging multidrug-resistant pathogen implicated in numerous outbreaks worldwide, with a notably high mortality rate (ca. 60%). A significant challenge with treatment of these infections is the resistance of C. auris to most antifungal drugs used clinically. Thus, finding co-drugs capable of overco...
journal_title:International journal of antimicrobial agents
pub_type: 杂志文章
doi:10.1016/j.ijantimicag.2018.08.016
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abstract::Linezolid is the first available oxazolidinone, possessing broad-spectrum activity against Gram-positive bacteria and a favourable pharmacokinetic profile. The aim of this study was to compare the efficacy and safety of linezolid with vancomycin, the gold-standard treatment, for meticillin-resistant Staphylococcus aur...
journal_title:International journal of antimicrobial agents
pub_type: 杂志文章,meta分析
doi:10.1016/j.ijantimicag.2012.12.012
更新日期:2013-05-01 00:00:00
abstract::Orthopaedic implant-associated infections are a devastating complication of orthopaedic surgery with a significant impact on patients and healthcare systems. The aims of this work were to describe the patterns of antimicrobial resistance, pathogenicity and virulence of clinical bacterial isolates from orthopaedic impl...
journal_title:International journal of antimicrobial agents
pub_type: 杂志文章
doi:10.1016/j.ijantimicag.2019.06.007
更新日期:2019-09-01 00:00:00
abstract::Candida spp., especially Candida albicans, is one of the main colonisers of the oral cavity. Due to its ability to form biofilms, it can be implicated in dental caries, periodontal disease and denture stomatitis. Microbial cells in biofilms are minimally impacted by conventional drugs. The aim of this study was to fin...
journal_title:International journal of antimicrobial agents
pub_type: 杂志文章
doi:10.1016/j.ijantimicag.2018.08.020
更新日期:2018-12-01 00:00:00
abstract::A restrictive antibiotic policy banning routine use of ceftriaxone and ciprofloxacin was implemented in a 450-bed district general hospital following an educational campaign. Monthly consumption of nine antibiotics was monitored in defined daily doses (DDDs) per 1000 patient-occupied bed-days (1000 pt-bds) 9 months be...
journal_title:International journal of antimicrobial agents
pub_type: 杂志文章
doi:10.1016/j.ijantimicag.2012.10.013
更新日期:2013-02-01 00:00:00