Abstract：
:The bacterial time-kill curves of azithromycin against four bacterial strains (Streptococcus pneumoniae/penicillin-intermediate, S. pneumoniae/penicillin-sensitive, Haemophilus influenzae and Moraxella catarrhalis) were determined by in vitro infection models. Eighteen different pharmacokinetic/pharmacodynamic models were fitted to the time-kill data using non-linear regression and compared for best fit. A simple, widely used E(max) model was not sufficient to describe the pharmacodynamic effects for the four bacterial strains. Appropriate models that gave good curve fits included additional terms for saturation of the number of bacteria (N(max)), delay in the initial bacterial growth phase and/or the onset of anti-infective activity (1-exp(-zt)) as well as a Hill factor (h) that captures the steepness of the concentration-response profile. Azithromycin was highly effective against S. pneumoniae strains and M. catarrhalis while the efficacy against H. influenzae was poor. Applications of these pharmacokinetic/pharmacodynamic models will eventually provide a tool for rational antibiotic dosing regimen decisions.
journal_name
Int J Antimicrob Agentsjournal_title
International journal of antimicrobial agentsauthors
Treyaprasert W,Schmidt S,Rand KH,Suvanakoot U,Derendorf Hdoi
10.1016/j.ijantimicag.2006.08.049subject
Has Abstractpub_date
2007-03-01 00:00:00pages
263-70issue
3eissn
0924-8579issn
1872-7913pii
S0924-8579(06)00428-6journal_volume
29pub_type
杂志文章abstract：:The rise and spread of antimicrobial resistance represents one of the most pressing health issues of today. Antimicrobial resistance in micro-organisms can arise due to a multiplicity of factors, including permeability changes in the cell membrane, increase of drug efflux pumps, enzymatic modification or inactivation ...
journal_title：International journal of antimicrobial agents
pub_type： 杂志文章,评审
doi：10.1016/j.ijantimicag.2020.106005
更新日期：2020-07-01 00:00:00
abstract：:Carbapenem-resistant Acinetobacter spp. are being increasingly reported worldwide, including in South Korea, where we examined 144 representative isolates collected in a nationwide hospital survey in 2005. Metallo-beta-lactamases were detected in only 19.4% of isolates, none of which were Acinetobacter baumannii, wher...
journal_title：International journal of antimicrobial agents
pub_type： 杂志文章
doi：10.1016/j.ijantimicag.2008.10.009
更新日期：2009-06-01 00:00:00
abstract：:Antimicrobial peptides (AMPs) are essential host defence molecules found in a wide variety of species and are promising antibacterial therapeutic candidates. Focusing on the human cathelicidin peptide LL-37, the aim of the present study was to explore the mechanisms of action and antimicrobial activities of a library ...
journal_title：International journal of antimicrobial agents
pub_type： 杂志文章
doi：10.1016/j.ijantimicag.2010.06.031
更新日期：2010-11-01 00:00:00
abstract：OBJECTIVES:To identify and characterize oxazolidinone resistance genes cfr and optrA in enterococcal isolates. METHODS:Two hundred and ninety-three enterococcal isolates were screened for the presence of cfr and optrA by polymerase chain reaction. The transferability of cfr and optrA was examined by conjugation. S1 nu...
journal_title：International journal of antimicrobial agents
pub_type： 杂志文章
doi：10.1016/j.ijantimicag.2020.105993
更新日期：2020-07-01 00:00:00
abstract：:The mechanism(s) of resistance or decreased susceptibility to cefepime (FEP) and/or imipenem (IMP) in three consecutive isolates of Enterobacter aerogenes (Ea1, Ea2 and Ea3) cultured from bronchial aspirates of the same patient after treatment with ceftriaxone and FEP were studied. Identification was performed with th...
journal_title：International journal of antimicrobial agents
pub_type： 杂志文章
doi：10.1016/j.ijantimicag.2006.01.005
更新日期：2006-06-01 00:00:00
abstract：:The effect of subinhibitory concentrations of amikacin and ciprofloxacin on the susceptibility of Escherichia coli strains to the bactericidal action of normal human serum, outer membrane protein (OMP) expression and cell morphology was investigated. Sub-minimal inhibitory concentrations (sub-MICs) of both antibiotics...
journal_title：International journal of antimicrobial agents
pub_type： 杂志文章
doi：10.1016/j.ijantimicag.2008.12.006
更新日期：2009-06-01 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：: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：:Globally, antibiotic resistance continues to be an increasing problem. The emergence of methicillin-resistant Staphylococcus aureus (MRSA), vancomycin-resistant enterococci (VRE), and extended spectrum beta-lactamase-producing Enterobacteriaceae has seriously reduced the number of empirical agents suitable for selecte...
journal_title：International journal of antimicrobial agents
pub_type： 杂志文章,评审
doi：10.1016/S0924-8579(09)70003-2
更新日期：2008-12-01 00:00:00
abstract：:The celestial rise in antibiotic resistance among Gram-negative bacteria has challenged both the scientific and pharmaceutical sectors. The hallmark of this general increase is the unbridled dissemination of carbapenem resistance genes, namely KPC, OXA and metallo-β-lactamase variants. In particular, the media attenti...
journal_title：International journal of antimicrobial agents
pub_type： 杂志文章,评审
doi：10.1016/S0924-8579(10)70004-2
更新日期：2010-11-01 00:00:00
abstract：:Treatment options for multidrug-resistant (MDR) strains of Acinetobacter baumannii that acquire resistance to colistin are limited. Acinetobacter baumannii can become highly resistant to colistin through complete loss of lipopolysaccharide (LPS) owing to mutations in the genes encoding the first three enzymes involved...
journal_title：International journal of antimicrobial agents
pub_type： 杂志文章
doi：10.1016/j.ijantimicag.2015.07.017
更新日期：2015-12-01 00:00:00
abstract：:The objective of this study was to investigate the drug resistance characteristics of Mycobacterium tuberculosis isolates to four first-line antituberculous drugs (ATDs) from tuberculosis (TB) patients with AIDS in Beijing, China. All M. tuberculosis strains were isolated from specimens from TB patients with AIDS hosp...
journal_title：International journal of antimicrobial agents
pub_type： 杂志文章
doi：10.1016/j.ijantimicag.2014.09.013
更新日期：2015-02-01 00:00:00
abstract：:Twenty-five years after its introduction, ceftazidime remains the most active cephalosporin against Pseudomonas aeruginosa. Nevertheless, resistance arises by upregulation of AmpC beta-lactamase, by efflux or, less often, via acquisition of additional beta-lactamases. Mutational resistance is especially prevalent amon...
journal_title：International journal of antimicrobial agents
pub_type： 杂志文章
doi：10.1016/j.ijantimicag.2009.03.021
更新日期：2009-11-01 00:00:00
abstract：:The activity of six fluoroquinolones (FQs) was determined against 100 methicillin-resistant Staphylococcus aureus (MRSA) isolated in 2002 along with mutations in the grlA and gyrA genes and in the norA promoter of these isolates. Of the isolates tested, 97% had mutations in grlA and gyrA. A single mutation in grlA and...
journal_title：International journal of antimicrobial agents
pub_type： 杂志文章
doi：10.1016/j.ijantimicag.2004.11.016
更新日期：2005-05-01 00:00:00
abstract：:Surveillance initiatives to track Streptococcus pneumoniae resistance trends are important for understanding the current in vitro effectiveness of available antimicrobial agents. The antimicrobial susceptibility profiles of S. pneumoniae (n=1479 isolates) collected from 17 geographical areas across the USA (2003-2004)...
journal_title：International journal of antimicrobial agents
pub_type： 杂志文章
doi：10.1016/j.ijantimicag.2006.09.002
更新日期：2006-12-01 00:00:00
abstract：:In November 2015, the first plasmid-encoded colistin resistance gene, mcr-1, was described in animals and in humans in China. Subsequently, a multitude of further studies was performed and quite recently the global spread of mcr-1 as well as the occurrence of a new gene variant, mcr-2, was reported. To obtain an overv...
journal_title：International journal of antimicrobial agents
pub_type： 杂志文章
doi：10.1016/j.ijantimicag.2017.03.007
更新日期：2017-08-01 00:00:00
abstract：:Integrons recruit resistance genes through integrase-driven recombination events that are regulated by the bacterial SOS response and require the repressor LexA. Class 1 integrons genes are expressed from a common promoter, Pc, of which at least 5 predominant variants, classified from weak to strong, have been describ...
journal_title：International journal of antimicrobial agents
pub_type： 杂志文章
doi：10.1016/j.ijantimicag.2018.11.012
更新日期：2019-04-01 00:00:00
abstract：:Although the vancomycin minimum inhibitory concentration (VMIC) susceptibility breakpoint for Staphylococcus aureus was recently lowered to ≤2 mg/L, it is argued that isolates in the higher levels of the susceptible range may bear adverse clinical outcomes. Clinical outcomes (all-cause mortality and treatment failure)...
journal_title：International journal of antimicrobial agents
pub_type： 杂志文章,meta分析,评审
doi：10.1016/j.ijantimicag.2012.07.023
更新日期：2012-12-01 00:00:00
abstract：:The bactericidal activity and resistance selectivity of garenoxacin against Streptococcus pneumoniae with mutations in ParC (S79F) or both GyrA (S81F) and ParC (D83Y and K137N) were investigated using in vitro pharmacokinetic models simulating plasma concentrations for a standard clinical regimen [400mg once daily (q....
journal_title：International journal of antimicrobial agents
pub_type： 杂志文章
doi：10.1016/j.ijantimicag.2011.09.021
更新日期：2012-02-01 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：:This study looked for beta-lactamase production in 100 Prevotella isolates. MICs were determined for amoxycillin, ticarcillin, amoxycillin+clavulanate, cephalothin, cefuroxime, cefixime, cefpodoxime and cefotaxime using the reference agar dilution method (standard M11 A4, NCCLS). Beta-lactamase activity was detected i...
journal_title：International journal of antimicrobial agents
pub_type： 杂志文章
doi：10.1016/s0924-8579(02)00352-7
更新日期：2003-03-01 00:00:00
abstract：:MIC distribution and susceptibility to four antimicrobial agents were determined by E-test for 94 Helicobacter pylori isolates from Costa Rica. Disk diffusion was evaluated as an alternative method to determine susceptibility and compared with the E-test results by linear regression analysis and an error-rate bounded ...
journal_title：International journal of antimicrobial agents
pub_type： 杂志文章
doi：10.1016/j.ijantimicag.2004.07.009
更新日期：2004-12-01 00:00:00
abstract：:Fifteen carbapenem-non-susceptible Escherichia coli isolates obtained during the period May 2010 to April 2011 in a hospital and a long-term care facility (LTCF) in Larissa (Central Greece) were investigated. Minimum inhibitory concentrations (MICs) to various antimicrobial agents were determined by Etest. Carriage of...
journal_title：International journal of antimicrobial agents
pub_type： 杂志文章
doi：10.1016/j.ijantimicag.2011.11.003
更新日期：2012-03-01 00:00:00
abstract：:In this study, topoisomerase mutations in ciprofloxacin-resistant and -susceptible Campylobacter jejuni were analysed by DNA sequencing. In certain ciprofloxacin-resistant C. jejuni, the mechanism of resistance was complex. The Thr86-Ala substitution in the GyrA protein appears to play a role in increasing the minimum...
journal_title：International journal of antimicrobial agents
pub_type： 杂志文章
doi：10.1016/j.ijantimicag.2006.11.012
更新日期：2007-04-01 00:00:00
abstract：BACKGROUND:There are several empiric antibiotic treatment options for febrile neutropenia, yet there is no universally-accepted initial protocol. We aimed to assess the performance of a protocol (piperacillin, gentamicin and cefazolin) introduced over 40 years ago and compare its coverage against bacteria isolated from...
journal_title：International journal of antimicrobial agents
pub_type： 杂志文章
doi：10.1016/j.ijantimicag.2017.06.016
更新日期：2018-01-01 00:00:00
abstract：:Infestation with parasitic helminths is a common problem in human populations of third world countries and is ubiquitous in livestock and other domestic animals. The cell-membrane efflux pump, P-glycoprotein (Pgp), appears to contribute to anthelmintic resistance. Pgp have been identified from both phyla of parasitic ...
journal_title：International journal of antimicrobial agents
pub_type： 杂志文章,评审
doi：10.1016/s0924-8579(03)00221-8
更新日期：2003-09-01 00:00:00
abstract：:In this study, 2275 clinical isolates of 49 species of non-tuberculous mycobacteria isolated in The Netherlands were subjected to standardised drug susceptibility testing using the Middlebrook 7H10 agar dilution method. Clarithromycin and rifabutin were most active, with 87% and 83% of all isolates, respectively, bein...
journal_title：International journal of antimicrobial agents
pub_type： 杂志文章
doi：10.1016/j.ijantimicag.2009.09.023
更新日期：2010-02-01 00:00:00
abstract：:In this study, 183 Salmonella enterica isolates were characterised for integrons and virulence genes. Among the isolates, 46% were positive for intI1, but no isolates carried intI2 or intI3. Eighteen class 1 integrons (21%) contained resistance gene cassettes (i.e. dfrA1-orfC, dfrA12-aadA2, bla(PSE-1) and aadA2) and f...
journal_title：International journal of antimicrobial agents
pub_type： 杂志文章
doi：10.1016/j.ijantimicag.2010.12.001
更新日期：2011-05-01 00:00:00
abstract：:This study aimed to characterise UTIs caused by Pseudomonas aeruginosa in hospitalised adults and to identify risk factors for infections caused by multidrug-resistant (MDR) strains. A retrospective case-case-control study was conducted in two Italian teaching hospitals. Totally, 242 monomicrobial P. aeruginosa UTIs w...
journal_title：International journal of antimicrobial agents
pub_type： 杂志文章
doi：10.1016/j.ijantimicag.2020.105900
更新日期：2020-04-01 00:00:00
abstract：:This study was designed to evaluate the potential role of fosfomycin as a therapeutic agent in human listeriosis. The in vitro activity of fosfomycin against 154 Listeria monocytogenes clinical isolates under conditions that mimic the induction of prfA expression was determined and was correlated with fosfomycin intra...
journal_title：International journal of antimicrobial agents
pub_type： 杂志文章
doi：10.1016/j.ijantimicag.2013.10.018
更新日期：2014-02-01 00:00:00
