Abstract:
:Acinetobacter baumannii has emerged as a major pathogen causing nosocomial infections, particularly in critical patients admitted to the Intensive Care Unit. Increasing resistance to carbapenems in A. baumannii has been observed worldwide. Here we report the clinical impact and mechanism of imipenem heteroresistance (imipenem minimum inhibitory concentration of 6-32 μg/mL with the presence of resistant cells inside the inhibition zone of Etest strips or disks) in multidrug-resistant A. baumannii (MDR-AB). To identify risk factors associated with the emergence of imipenem heteroresistance, a retrospective case-control study was undertaken involving cases with subsequent clinical isolates of the same genotype showing loss of imipenem susceptibility and matched controls with isolates belonging to imipenem-susceptible MDR-AB. The molecular mechanism of heteroresistance was examined. From April 2006 to March 2007, 126 consecutive isolates of MDR-AB were identified from 29 patients. Switch from imipenem susceptibility to heteroresistance was more likely to occur in successive MDR-AB derived from patients who had been exposed to imipenem (length of use 10.9 ± 6.5 days for cases vs. 5.3 ± 4.8 days for controls; P=0.02). An insertion sequence (ISAba1) was found in the promoter region of a class C β-lactamase gene (bla(ADC-29)) in most imipenem-heteroresistant MDR-AB isolates. In vitro experiments indicated that imipenem heteroresistance, which was associated with overexpression of bla(ADC-29), could be induced by imipenem. Carbapenem use was the only risk factor identified for the emergence of carbapenem-heteroresistant MDR-AB. Physicians should weigh the benefits and risks of each carbapenem-based treatment in managing carbapenem-susceptible MDR-AB infection.
journal_name
Int J Antimicrob Agentsjournal_title
International journal of antimicrobial agentsauthors
Lee HY,Chen CL,Wang SB,Su LH,Chen SH,Liu SY,Wu TL,Lin TY,Chiu CHdoi
10.1016/j.ijantimicag.2010.12.015subject
Has Abstractpub_date
2011-04-01 00:00:00pages
302-8issue
4eissn
0924-8579issn
1872-7913pii
S0924-8579(11)00036-7journal_volume
37pub_type
杂志文章abstract::Control of dental plaque-related diseases has traditionally relied on non-specific removal of plaque by mechanical means. As our knowledge of oral disease mechanisms increases, future treatment is likely to be more targeted, for example at small groups of organisms, single species or at key virulence factors they prod...
journal_title:International journal of antimicrobial agents
pub_type: 杂志文章,评审
doi:10.1016/j.ijantimicag.2008.07.014
更新日期:2009-01-01 00:00:00
abstract::Colistin remains a last-line antibiotic for the treatment of infections by multidrug-resistant Acinetobacter species. However, mortality rates are high in patients with Acinetobacter infection receiving colistin treatment. This multicentre study evaluated whether colistin susceptibility, additional antimicrobial agent...
journal_title:International journal of antimicrobial agents
pub_type: 杂志文章
doi:10.1016/j.ijantimicag.2020.105956
更新日期:2020-06-01 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::Resistance to antimicrobial agents in Gram-positive and Gram-negative bacteria is common in Turkey. In this review, resistance to several antimicrobial agents in this country is discussed for bacteria which have gained clinical importance in recent years. Among Gram-positives, staphylococci are of major importance bec...
journal_title:International journal of antimicrobial agents
pub_type: 杂志文章
doi:10.1016/0924-8579(95)00026-5
更新日期:1995-09-01 00:00:00
abstract::The safety of all drugs is established by animal studies, administration to healthy volunteers and the observations during clinical studies to confirm efficacy. During these studies, patients are questioned about side-effects and extensive laboratory testing of blood and urine samples is performed. Despite these exten...
journal_title:International journal of antimicrobial agents
pub_type: 杂志文章,评审
doi:10.1016/s0924-8579(01)00399-5
更新日期:2001-01-01 00:00:00
abstract::Due to limited therapeutic options, combination therapy has been used empirically to treat carbapenem-resistant Acinetobacter baumannii (CRAB). Polymyxin-based combinations have been widely studied and used in the clinical setting. However, the use of polymyxins is often limited due to nephrotoxicity and neurotoxicity...
journal_title:International journal of antimicrobial agents
pub_type: 杂志文章
doi:10.1016/j.ijantimicag.2020.106115
更新日期:2020-10-01 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::Investigation of biomarkers that can promptly predict unfavourable outcome of critically illness is an emerging necessity taking into consideration the need for early intervention, the shortage of available beds in intensive care units and the considerable cost of hospitalisation. The most promising biomarker is solub...
journal_title:International journal of antimicrobial agents
pub_type: 杂志文章,评审
doi:10.1016/j.ijantimicag.2015.10.011
更新日期:2015-12-01 00:00:00
abstract::Carbapenemase-producing (CP) Pseudomonas aeruginosa is rare compared with mutation-driven carbapenem-resistance, but this situation may be changing. A collection of CP P. aeruginosa isolates was characterized in this study. In 2016, 232 unduplicated carbapenem-resistant P. aeruginosa isolates, of which 71 (30.6%) carr...
journal_title:International journal of antimicrobial agents
pub_type: 杂志文章
doi:10.1016/j.ijantimicag.2020.106026
更新日期:2020-07-01 00:00:00
abstract::The mutant prevention concentration (MPC) was determined by population analysis using six fluoroquinolone-susceptible isolates of Pseudomonas aeruginosa applied to fluoroquinolone-containing agar plates. The MPCs were 3 mg/L and 9.5 mg/L for ciprofloxacin and levofloxacin, respectively. At high concentrations of eithe...
journal_title:International journal of antimicrobial agents
pub_type: 杂志文章
doi:10.1016/j.ijantimicag.2005.10.005
更新日期:2006-02-01 00:00:00
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::The proportion of non-albicans candidaemia has increased during recent decades, especially Candida glabrata. We evaluated the antifungal susceptibility, clinical features and outcome of C. glabrata fungaemia treated in a tertiary centre in Taiwan. All episodes of C. glabrata fungaemia during 1999-2005 were identified ...
journal_title:International journal of antimicrobial agents
pub_type: 杂志文章
doi:10.1016/j.ijantimicag.2009.02.021
更新日期:2009-09-01 00:00:00
abstract::Ciprofloxacin, levofloxacin, ofloxacin, and trovafloxacin were tested by the E-test against 100 clinical isolates of Pseudomonas aeruginosa. Ciprofloxacin was the most active of the tested agents with 82% of isolates having a MIC =1 mg/l (range: 0.094->8). Levofloxacin and trovafloxacin had nearly identical potency:...
journal_title:International journal of antimicrobial agents
pub_type: 杂志文章
doi:10.1016/s0924-8579(00)00132-1
更新日期:2000-06-01 00:00:00
abstract::The resistance patterns of Escherichia coli in untreated (raw) urban wastewater (UW) was monitored by repeated sampling during 1 year. Comparison with data from wastewater samples collected from hospital wastewater (HW) in the same urban area was made. A total of 1326 E. coli isolates from 17 UW samples and 451 isolat...
journal_title:International journal of antimicrobial agents
pub_type: 杂志文章
doi:10.1016/j.ijantimicag.2014.09.016
更新日期:2015-01-01 00:00:00
abstract::In this study, 619 individual Escherichia coli isolates from food-producing and companion animals were analysed to determine the prevalence of the cephalosporinase gene blaCMY-2. In total, 18 CMY-2-producers (2.9%) were detected and exhibited multidrug-resistant phenotypes. One of the CMY-2-producers was found to poss...
journal_title:International journal of antimicrobial agents
pub_type: 杂志文章
doi:10.1016/j.ijantimicag.2015.04.003
更新日期:2015-08-01 00:00:00
abstract::In this study, we investigated the in vivo efficacy of anidulafungin during the early phase of disseminated candidiasis in a neutropenic murine model and compared the results with those obtained for fluconazole. Antifungal efficacy was evaluated by reduction of fungal burden in the tissues of infected animals at perio...
journal_title:International journal of antimicrobial agents
pub_type: 杂志文章
doi:10.1016/j.ijantimicag.2010.02.020
更新日期:2010-07-01 00:00:00
abstract::Coxiella burnetii is the bacterial agent of Q fever in humans. Acute Q fever generally manifests as a flu-like illness and is typically self-resolving. In contrast, chronic Q fever usually presents with endocarditis and is often life-threatening without appropriate antimicrobial therapy. Unfortunately, available optio...
journal_title:International journal of antimicrobial agents
pub_type: 杂志文章
doi:10.1016/j.ijantimicag.2010.05.017
更新日期:2010-10-01 00:00:00
abstract::The in vitro activity of the steroidal amide 3beta-acetoxy-17beta-(L-prolyl)amino-5alpha-androstane against 179 gram-positive clinical isolates was examined. The minimum bactericidal concentration (MBC)/MIC ratios were < or = 2 for 73% of methicillin-resistant Staphyllococcus aureus, 59% of vancomycin-resistant Entero...
journal_title:International journal of antimicrobial agents
pub_type: 杂志文章
doi:10.1016/s0924-8579(00)00156-4
更新日期:2000-08-01 00:00:00
abstract::Acinetobacter baumannii is an opportunistic pathogen predominantly associated with nosocomial infections. The World Health Organization's data on antibiotic-resistant 'priority pathogens' reports carbapenem-resistant A. baumannii as a pathogen which is in critical need of research and development of new antimicrobials...
journal_title:International journal of antimicrobial agents
pub_type: 杂志文章
doi:10.1016/j.ijantimicag.2019.03.009
更新日期:2019-05-01 00:00:00
abstract::Many drugs used to treat non-infectious diseases have also shown excellent antibacterial activity or the ability to enhance the action of antibiotics. The aim of this study was to investigate the antibacterial activity of a popular β-blocker, carvedilol, and its mechanism of antibacterial action. The antibacterial act...
journal_title:International journal of antimicrobial agents
pub_type: 杂志文章
doi:10.1016/j.ijantimicag.2017.12.014
更新日期:2018-03-01 00:00:00
abstract::Advanced molecular typing methods have greatly expanded the taxonomy of Mycobacterium avium complex (MAC) species; however, little is known about the epidemiology and clinical features of bacteraemia caused by different MAC species. In this study, the clinical characteristics of patients treated for MAC bacteraemia in...
journal_title:International journal of antimicrobial agents
pub_type: 杂志文章
doi:10.1016/j.ijantimicag.2017.02.016
更新日期:2017-07-01 00:00:00
abstract::The pharmacokinetic/pharmacodynamic (PK/PD) index for the efficacy of linezolid is a 24-h area under the plasma drug concentration-time curve (AUC₂₄)/minimum inhibitory concentration (MIC) ratio of ≥100. The main adverse event associated with administration of linezolid is thrombocytopenia. Therefore, the aims of the ...
journal_title:International journal of antimicrobial agents
pub_type: 杂志文章
doi:10.1016/j.ijantimicag.2014.05.010
更新日期:2014-09-01 00:00:00
abstract::The infecting pathogen and its susceptibility to antibiotics is used to suggest prognosis in endocarditis. A case study was performed in a tertiary referral cardiology centre to assess the contribution of the measurement of minimum inhibitory concentration (MIC) to the decision to treat endocarditis surgically. The re...
journal_title:International journal of antimicrobial agents
pub_type: 杂志文章
doi:10.1016/j.ijantimicag.2003.08.012
更新日期:2004-04-01 00:00:00
abstract::The extracts from the starfish Asterina pectinifera obtained using various organic solvents and distilled water were tested for their antimicrobial activities against fungi and yeasts. The methanol and water extracts were found to be the most active and Aspergillus spp. and Cryptococcus neoformans proved to be sensiti...
journal_title:International journal of antimicrobial agents
pub_type: 杂志文章
doi:10.1016/s0924-8579(98)00079-x
更新日期:1999-01-01 00:00:00
abstract::Cytomegalovirus (CMV) is the most important pathogen in the human herpes family for immunocompromised hosts. Recognition and monitoring of CMV disease has been improved due to development of four quantitative laboratory assays for CMV: antigenemia, polymerase chain reaction for CMV DNA, branched DNA assay, and the hyb...
journal_title:International journal of antimicrobial agents
pub_type: 杂志文章
doi:10.1016/s0924-8579(96)00339-1
更新日期:1996-10-01 00:00:00
abstract::Leptospirosis is the most common zoonotic disease and is endemic worldwide. The antibiotic susceptibilities of Leptospira strains isolated from both humans and animals are poorly documented. This issue is particularly important for isolates from food-producing animals which are regularly exposed to antibiotic treatmen...
journal_title:International journal of antimicrobial agents
pub_type: 杂志文章
doi:10.1016/j.ijantimicag.2017.12.024
更新日期:2018-05-01 00:00:00
abstract::The Candida albicans zinc cluster proteins are a family of transcription factors (TFs) that play essential roles in the development of antifungal drug resistance. Gain-of-function mutations in several TFs, such as Tac1p, Mrr1p and Upc2p, have been previously well documented in azole-resistant clinical C. albicans isol...
journal_title:International journal of antimicrobial agents
pub_type: 杂志文章
doi:10.1016/j.ijantimicag.2015.08.001
更新日期:2015-11-01 00:00:00
abstract::Resistance to chemotherapy is a common clinical problem in patients with infectious diseases as well as in patients with cancer. During treatment of infections or malignant tumors, the drug targets of prokaryotic or eukaryotic microorganisms and neoplastic cells are often found to be refractory to a variety of drugs t...
journal_title:International journal of antimicrobial agents
pub_type: 杂志文章,评审
doi:10.1016/s0924-8579(03)00203-6
更新日期:2003-09-01 00:00:00
abstract::There is strong evidence that self-monitoring and feedback are effective behaviour change techniques (BCTs) across a range of healthcare interventions and that their effectiveness is enhanced by goal setting and action planning. Here we report a summary of the update of a systematic review assessing the application of...
journal_title:International journal of antimicrobial agents
pub_type: 杂志文章,评审
doi:10.1016/j.ijantimicag.2014.11.014
更新日期:2015-03-01 00:00:00
abstract::The in vitro activity of a new fluoroquinolone, trovafloxacin (CP-99,219) was compared with that of ten other agents against 100 clinical isolates in the Bacteroides fragilis group. Trovafloxacin was the most active quinolone (MIC(90), 1 microg/ml) followed by sparfloxacin (MIC(90), 8 microg/ml), levofloxacin (MIC(90)...
journal_title:International journal of antimicrobial agents
pub_type: 杂志文章
doi:10.1016/s0924-8579(97)00014-9
更新日期:1997-05-01 00:00:00