Emergence of a novel lamivudine-resistant hepatitis B virus variant with a substitution outside the YMDD motif.

abstract：:The rate of occurrence of the extended-spectrum beta-lactamase (ESBL)-producing phenotype among Escherichia coli isolates in Tel Aviv is 12% (22). The aim of this study was to understand the molecular epidemiology of E. coli ESBL producers and to identify the ESBL genes carried by them. We studied 20 single-patient ES...

journal_title：Antimicrobial agents and chemotherapy

authors： Chmelnitsky I,Carmeli Y,Leavitt A,Schwaber MJ,Navon-Venezia S

更新日期：2005-11-01 00:00:00

abstract：:Monobactams containing 3 beta-aminothiazolyl oxime side chains (SQ 81,377, SQ 81,402, azthreonam, and SQ 26,917) have poor affinities for the broad-spectrum beta-lactamases TEM-2 and K1. Addition of a 4-methyl substituent significantly increased stability to hydrolysis by these enzymes. P99 cephalosporinase from Enter...

journal_title：Antimicrobial agents and chemotherapy

authors： Bush K,Freudenberger JS,Sykes RB

更新日期：1982-09-01 00:00:00

abstract：:We compared the efficacy of combination posaconazole-liposomal amphotericin B (LAmB) therapy to monotherapy with either drug in diabetic ketoacidotic or neutropenic mice with disseminated zygomycosis caused by Rhizopus oryzae. Combination therapy was no better than LAmB alone, and posaconazole monotherapy did not impr...

journal_title：Antimicrobial agents and chemotherapy

authors： Ibrahim AS,Gebremariam T,Schwartz JA,Edwards JE Jr,Spellberg B

更新日期：2009-02-01 00:00:00

abstract：:Ketoconazole, an oral antimycotic imidazole drug, blocked the transport of electrons in the respiratory chain of Candida albicans under aerobic conditions with different substrates, such as NADH and succinate. This effect was a nonspecific inhibition of NADH oxidases and succinate oxidases. The addition of ketoconazol...

journal_title：Antimicrobial agents and chemotherapy

authors： Shigematsu ML,Uno J,Arai T

更新日期：1982-06-01 00:00:00

abstract：:Staphylococcal isolates were examined for possible macrolide-inducible resistance to telithromycin. All macrolide-resistant isolates demonstrated telithromycin D-shaped zones. This result did not discriminate between resistance due to an efflux mechanism (msrA) or a ribosomal target modification (ermA or ermC). Induci...

journal_title：Antimicrobial agents and chemotherapy

authors： Davis KA,Crawford SA,Fiebelkorn KR,Jorgensen JH

更新日期：2005-07-01 00:00:00

abstract：:This work investigated the molecular events driving the evolution of the CTX-M-type β-lactamases by the use of DNA shuffling of fragments of the blaCTX-M-14 and blaCTX-M-15 genes. Analysis of a total of 51 hybrid enzymes showed that enzymatic activity could be maintained in most cases, yet hybrids that were active pos...

journal_title：Antimicrobial agents and chemotherapy

authors： Po KHL,Chan EWC,Chen S

更新日期：2017-11-22 00:00:00

abstract：:Resistance to piperaquine has been associated with the amplification of the plasmepsin II gene in Cambodia. None of the 175 African isolates that we analyzed had plasmepsin II gene amplification (piperaquine 50% inhibitory concentration ranged from 0.94 to 137.5 nM), suggesting there is a low prevalence of piperaquine...

journal_title：Antimicrobial agents and chemotherapy

authors： Robert MG,Foguim Tsombeng F,Gendrot M,Mosnier J,Amalvict R,Benoit N,Torrentino-Madamet M,Pradines B,French National Reference Centre for Imported Malaria Study Group.

更新日期：2018-10-24 00:00:00

abstract：:Resistance to peptide deformylase inhibitors in Escherichia coli or Staphylococcus aureus is due to inactivation of transformylase activity. Knockout experiments in Streptococcus pneumoniae R6x indicate that the transformylase (fmt) and deformylase (defB) genes are essential and that a def paralog (defA) is not. Actin...

journal_title：Antimicrobial agents and chemotherapy

authors： Margolis P,Hackbarth C,Lopez S,Maniar M,Wang W,Yuan Z,White R,Trias J

更新日期：2001-09-01 00:00:00

abstract：:The mecillinam resistance of Escherichia coli K-12 mutants deficient in the enzyme responsible for the synthesis of adenosine 3',5'-monophosphate, adenylate cyclase, has been investigated. The results suggest that resistance to this antibiotic may be a consequence of the slow growth rate of these mutants rather than a...

journal_title：Antimicrobial agents and chemotherapy

authors： Scott NW,Harwood CR

更新日期：1981-04-01 00:00:00

abstract：:The 4,6-disubstituted 2-deoxystreptamines interfere with protein biosynthesis by specifically targeting the ribosomal A site. These drugs show subtle variations in the chemical groups of rings I, II, and III. In the present study we used site-directed mutagenesis to generate mutant strains of Mycobacterium smegmatis m...

journal_title：Antimicrobial agents and chemotherapy

authors： Hobbie SN,Pfister P,Brüll C,Westhof E,Böttger EC

更新日期：2005-12-01 00:00:00

abstract：:The biliary excretion profile of cefixime was studied in 10 patients provided with T-tube drainage of the common bile duct after cholecystectomy. Following a single 200-mg oral dose, the peak concentration of cefixime in bile reached 56.9 +/- 70 mg/liter, approximately 20 times as high as the peak concentration in ser...

journal_title：Antimicrobial agents and chemotherapy

authors： Westphal JF,Jehl F,Schloegel M,Monteil H,Brogard JM

更新日期：1993-07-01 00:00:00

abstract：:The minimal inhibiting concentrations (MIC) of ampicillin, trisulfapyrimidines, and various combinations of these drugs were determined for four clinical isolates of Nocardia asteroides on Mueller-Hinton agar. The combination of ampicillin and sulfonamides was found to be synergistic for three of the four isolates whe...

journal_title：Antimicrobial agents and chemotherapy

authors： Orfanakis MG,Wilcox HG,Smith CB

更新日期：1972-03-01 00:00:00

abstract：:This study determined the phylogenetic groups and virulence factors of 37 Escherichia coli isolates producing types of CTX-M compared with those of 19 isolates producing different types of extended-spectrum beta-lactamases (ESBLs) in a well-defined North American population. Most CTX-M-14 producers (97%) were from phy...

journal_title：Antimicrobial agents and chemotherapy

authors： Pitout JD,Laupland KB,Church DL,Menard ML,Johnson JR

更新日期：2005-11-01 00:00:00

abstract：:The biological activity of a new intravenous (i.v.) preparation of human vaccinia immune globulin (VIGIV) was evaluated in two mouse models of vaccinia virus (VV) infection. In a mouse tail lesion model, female CD-1 mice were inoculated i.v. with 7 x 10(4) PFU of VV to produce >10 lesions per tail 8 days later. In a m...

journal_title：Antimicrobial agents and chemotherapy

authors： Shearer JD,Siemann L,Gerkovich M,House RV

更新日期：2005-07-01 00:00:00

abstract：:The in vitro susceptibility of Brucella melitensis was examined vis-a-vis the clinical outcome in 75 patients with brucellosis. The initial MICs for Brucella isolates from patients who relapsed and from those who did not were similar. Furthermore, the MICs for isolates from patients whose infections relapsed were no d...

journal_title：Antimicrobial agents and chemotherapy

authors： Ariza J,Bosch J,Gudiol F,Liñares J,Viladrich PF,Martín R

更新日期：1986-12-01 00:00:00

abstract：:A strain of Escherichia coli containing TEM-1 and CTX-M-1 was tested in an in vitro pharmacokinetic model against ceftazidime with and without AM-112, a serine beta-lactamase inhibitor. Ceftazidime alone was less effective than ceftazidime plus AM-112, and a single dose was more effective than three fractionated doses...

journal_title：Antimicrobial agents and chemotherapy

authors： Bowker KE,Noel AR,Walsh TR,Rogers CA,MacGowan AP

更新日期：2004-11-01 00:00:00

abstract：:The topical delivery of liposomally encapsulated interferon was evaluated in the cutaneous herpes simplex virus guinea pig model. Application of liposomally entrapped interferon caused a reduction of lesion scores, whereas application of interferon formulated as a solution or as an emulsion was ineffective. The method...

journal_title：Antimicrobial agents and chemotherapy

authors： Weiner N,Williams N,Birch G,Ramachandran C,Shipman C Jr,Flynn G

更新日期：1989-08-01 00:00:00

abstract：:Mutants with multiple low-level antibiotic resistance were isolated from virulent wild-type Aeromonas salmonicida strains exposed to a low concentration of any one of several low-molecular-mass (approximately 635 daltons or less) antibiotics. Multiple resistance was toward beta-lactam compounds (penicillin G, ampicill...

journal_title：Antimicrobial agents and chemotherapy

authors： Wood SC,McCashion RN,Lynch WH

更新日期：1986-06-01 00:00:00

abstract：:Expression of eight transporter genes of Escherichia coli K-12 and its DeltaacrAB mutant prior to and after induction of both strains to tetracycline resistance and after reversal of induced resistance were analyzed by quantitative reverse transcriptase PCR. All transporter genes were overexpressed after induced resis...

journal_title：Antimicrobial agents and chemotherapy

authors： Viveiros M,Jesus A,Brito M,Leandro C,Martins M,Ordway D,Molnar AM,Molnar J,Amaral L

更新日期：2005-08-01 00:00:00

abstract：:As increasing numbers of colistin-resistant bacteria emerge, new therapies are urgently needed to treat infections caused by these pathogens. The discovery of new combination therapies is one important way to solve such problems. Here, we report that the antitumor drug PFK-158 and its analogs PFK-015 and 3PO can exert...

journal_title：Antimicrobial agents and chemotherapy

authors： Zhang Y,Wang X,Li X,Dong L,Hu X,Nie T,Lu Y,Lu X,Pang J,Li G,Yang X,Li C,You X

更新日期：2019-06-24 00:00:00

abstract：:The 50% inhibitory concentration (IC50s) of benflumetol (range, 12.5 to 240 nM; mean, 55.1 nM) for 158 Senegalese isolates were evaluated. Ten isolates (6%) showed decreased susceptibility to benflumetol. Benflumetol was slightly more potent against chloroquine-resistant isolates (P < 0.025). No correlation or weak co...

journal_title：Antimicrobial agents and chemotherapy

authors： Pradines B,Tall A,Fusai T,Spiegel A,Hienne R,Rogier C,Trape JF,Le Bras J,Parzy D

更新日期：1999-02-01 00:00:00

abstract：:We evaluated fleroxacin, a newer fluoroquinolone, against isolates from sputum from patients with cystic fibrosis. These isolates included rough and mucoid Pseudomonas aeruginosa, Pseudomonas cepacia, Staphylococcus aureus, Haemophilus influenzae, and Escherichia coli. Selected isolates were tested by the broth microd...

journal_title：Antimicrobial agents and chemotherapy

authors： Akaniro JC,Vidaurre CE,Stutman HR,Marks MI

更新日期：1990-10-01 00:00:00

abstract：:The genetic basis for fluoroquinolone resistance was examined in 30 high-level fluoroquinolone-resistant Escherichia coli clinical isolates from Beijing, China. Each strain also demonstrated resistance to a variety of other antibiotics. PCR sequence analysis of the quinolone resistance-determining region of the topois...

journal_title：Antimicrobial agents and chemotherapy

authors： Wang H,Dzink-Fox JL,Chen M,Levy SB

更新日期：2001-05-01 00:00:00

abstract：:beta-L-2',3'-Dideoxy-5-fluorocytidine (beta-L-FddC), a novel cytidine analog with an unnatural beta-L sugar configuration, has been demonstrated by our group and others to exhibit highly selective in vitro activity against human immunodeficiency virus types 1 and 2 and hepatitis B virus. This encouraging in vitro anti...

journal_title：Antimicrobial agents and chemotherapy

authors： Martin LT,Cretton-Scott E,Schinazi RF,Zhou XJ,McClure HM,Mathe C,Gosselin G,Imbach JL,Sommadossi JP

更新日期：1999-04-01 00:00:00

abstract：:All known DNA ligases catalyze the formation of a phosphodiester linkage between adjacent termini in double-stranded DNA via very similar mechanisms. The ligase family can, however, be divided into two classes: eubacterial ligases, which require NAD(+) as a cofactor, and other ligases, from viruses, archaea, and eukar...

journal_title：Antimicrobial agents and chemotherapy

authors： Ciarrocchi G,MacPhee DG,Deady LW,Tilley L

更新日期：1999-11-01 00:00:00

abstract：:Nine intubated patients were given a single, 2-g intravenous dose of aztreonam over 5 min. Samples of serum and bronchial secretion were obtained 2, 4, and 8 h after administration and assayed for aztreonam content. The mean concentrations in bronchial secretion ranged from 1.9 to 5.2 micrograms/ml and tended to be hi...

journal_title：Antimicrobial agents and chemotherapy

authors： Bechard DL,Hawkins SS,Dhruv R,Friedhoff LT

更新日期：1985-02-01 00:00:00

abstract：:Although the use of probiotics based on Bacillus strains to fight off intestinal pathogens and antibiotic-associated diarrhea is widespread, the mechanisms involved in producing their beneficial effects remain unclear. Here, we studied the ability of compounds secreted by the probiotic Bacillus clausii strain O/C to c...

journal_title：Antimicrobial agents and chemotherapy

authors： Ripert G,Racedo SM,Elie AM,Jacquot C,Bressollier P,Urdaci MC

更新日期：2016-05-23 00:00:00

abstract：:The prevalence of three plasmid-mediated quinolone resistance determinants, QnrA, QnrB, and QnrS, among 526 nonreplicate clinical isolates of Enterobacter cloacae collected at a Taiwanese university hospital in 2004 was determined by PCR and colony hybridization, and the association of Qnr with the IMP-8 metallo-beta-...

journal_title：Antimicrobial agents and chemotherapy

authors： Wu JJ,Ko WC,Tsai SH,Yan JJ

更新日期：2007-04-01 00:00:00

abstract：:The MICs and MBCs of the new difluorinated quinolone drug sparfloxacin against type strains belonging to 21 species of mycobacteria were screened. The MICs and MBCs were within the range of 0.1 to 2.0 and 0.1 to 4.0 micrograms/ml, respectively (with an MBC/MIC ratio of 1 to 2), and against 18 of the 21 species tested,...

journal_title：Antimicrobial agents and chemotherapy

authors： Rastogi N,Labrousse V,Goh KS,De Sousa JP

更新日期：1991-12-01 00:00:00

abstract：:β-Lactam resistance levels vary among methicillin-resistant Staphylococcus aureus (MRSA) clinical isolates, mediated by chromosomal mutations and exogenous resistance gene mecA However, MRSA resistance mechanisms are incompletely understood. A P440L mutation in the RNA polymerase β' subunit (RpoC) in slow-vancomycin-i...

journal_title：Antimicrobial agents and chemotherapy

authors： Matsuo M,Yamamoto N,Hishinuma T,Hiramatsu K

更新日期：2019-01-29 00:00:00