Crystal structure and activity studies of the Mycobacterium tuberculosis beta-lactamase reveal its critical role in resistance to beta-lactam antibiotics.

abstract：:We determined the antibiotic susceptibilities of 1,785 enterococcal bloodstream isolates collected over 25 years. Antibiotic resistance emerged at a greater rate in Enterococcus faecium than in other enterococcal species, and E. faecium isolates became proportionally more common over time. Our findings confirm the pat...

journal_title：Antimicrobial agents and chemotherapy

authors： Murdoch DR,Mirrett S,Harrell LJ,Monahan JS,Reller LB

更新日期：2002-11-01 00:00:00

abstract：:In a dose-ranging study of amprenavir (formerly 141W94), an inhibitor of the protease enzyme of human immunodeficiency virus (HIV) type 1, single-dose and steady-state pharmacokinetic parameters were estimated from plasma samples collected on day 1 and during week 3, respectively. Amprenavir was administered on either...

journal_title：Antimicrobial agents and chemotherapy

authors： Sadler BM,Gillotin C,Lou Y,Stein DS

更新日期：2001-01-01 00:00:00

abstract：:In vitro interactions of ciprofloxacin with imipenem and amikacin were evaluated by the killing-curve technique against 26 Pseudomonas aeruginosa strains resistant to amikacin and resistant or moderately susceptible to ciprofloxacin and imipenem. Imipenem enhanced killing by ciprofloxacin in tests with 11 strains, whe...

journal_title：Antimicrobial agents and chemotherapy

authors： Giamarellou H,Petrikkos G

更新日期：1987-06-01 00:00:00

abstract：:Two genes (rpsL and rrs) with mutations associated with streptomycin resistance in Mycobacterium tuberculosis were characterized in 78 streptomycin-resistant and 61 streptomycin-susceptible isolates recovered from patients living in the United States, South America, Europe, Africa, and Asia. Fifty-four percent of the ...

journal_title：Antimicrobial agents and chemotherapy

authors： Sreevatsan S,Pan X,Stockbauer KE,Williams DL,Kreiswirth BN,Musser JM

更新日期：1996-04-01 00:00:00

abstract：:Susceptibility testing of laboratory strains and clinical isolates of Borrelia burgdorferi indicates that resistance to erythromycin is present in them. Evaluation of the MICs, minimal bactericidal concentrations, and kinetics of bacterial killing of erythromycin suggests that this resistance is increased by preexposu...

journal_title：Antimicrobial agents and chemotherapy

authors： Terekhova D,Sartakova ML,Wormser GP,Schwartz I,Cabello FC

更新日期：2002-11-01 00:00:00

abstract：:Carbapenem resistance rates in Pseudomonas aeruginosa isolates in Colombia, as in many South American countries, are high for reasons that remain unclear. From our nationwide network, we describe the first detection of the metallo-beta-lactamase VIM-2 in clinical isolates of P. aeruginosa from multiple cities within C...

journal_title：Antimicrobial agents and chemotherapy

authors： Villegas MV,Lolans K,del Rosario Olivera M,Suarez CJ,Correa A,Queenan AM,Quinn JP,Colombian Nosocomial Resistance Study Group.

更新日期：2006-01-01 00:00:00

abstract：:Determinants encoding resistance to antibiotics, except penicillin, of 5 of 21 Streptococcus anginosus clinical isolates that we examined transferred by conjugation into Enterococcus faecalis and into 1 to 5 streptococcal recipients at frequencies of 10(-6) to 10(-8) transconjugants per donor. No R plasmids were detec...

journal_title：Antimicrobial agents and chemotherapy

authors： Clermont D,Horaud T

更新日期：1990-09-01 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：:Cefamandole pharmacokinetics were investigated in 24 adult males with stable renal function and creatinine clearances of 0 to 139 ml/min. After intramuscular injection of 1.0 g of cefamandole, peak plasma concentrations were achieved between 1 and 2 h. Maximum plasma concentration and drug half-life increased as creat...

journal_title：Antimicrobial agents and chemotherapy

authors： Czerwinski AW,Pederson JA

更新日期：1979-02-01 00:00:00

abstract：:wALADin1 benzimidazoles are specific inhibitors of δ-aminolevulinic acid dehydratase from Wolbachia endobacteria of filarial nematodes. We report that wALADin1 and two derivatives killed blood stage Plasmodium falciparum in vitro (50% inhibitory concentrations, 39, 7.7, and 12.8 μM, respectively). One of these derivat...

journal_title：Antimicrobial agents and chemotherapy

authors： Lentz CS,Sattler JM,Fendler M,Gottwalt S,Halls VS,Strassel S,Arriens S,Hannam JS,Specht S,Famulok M,Mueller AK,Hoerauf A,Pfarr KM

更新日期：2015-01-01 00:00:00

abstract：:Though the primary action of the cationic antibiotic polymyxin B is against the membrane of susceptible bacteria, severe morphological changes are detected in the cytoplasm. Using fluorescence microscopy and a mono-N-dansyl-polymyxin B derivative, we could demonstrate aggregations of the antibiotic with cellular mater...

journal_title：Antimicrobial agents and chemotherapy

authors： Schindler PR,Teuber M

更新日期：1975-07-01 00:00:00

abstract：:Human immunodeficiency virus (HIV) is the primary etiologic agent responsible for the AIDS pandemic. In this work, we used a chimeric recombinant protein strategy to test the possibility of irreversibly destroying the HIV-1 virion using an agent that simultaneously binds the Env protein and viral membrane. We construc...

journal_title：Antimicrobial agents and chemotherapy

authors： Contarino M,Bastian AR,Kalyana Sundaram RV,McFadden K,Duffy C,Gangupomu V,Baker M,Abrams C,Chaiken I

更新日期：2013-10-01 00:00:00

abstract：:Occidiofungin is a cyclic glyco-lipopeptide produced by Burkholderia contaminans. MICs against Candida species were between 0.5 and 2.0 μg/ml. Occidiofungin retains its in vitro potency in the presence of 5% and 50% human serum with a minimal lethal concentration (MLC) of 2 and 4 μg/ml, respectively. Time-kill and pos...

journal_title：Antimicrobial agents and chemotherapy

authors： Ellis D,Gosai J,Emrick C,Heintz R,Romans L,Gordon D,Lu SE,Austin F,Smith L

更新日期：2012-02-01 00:00:00

abstract：:Ajoene (4,5,9-trithiadodeca-1,6,11-triene 9-oxide), a product initially isolated from extracts of garlic (Allium sativum), was tested for its antimalarial activity in vivo in a well-characterized murine model. A single ajoene dose of 50 mg/kg, on the day of infection, suppressed the development of parasitemia; there w...

journal_title：Antimicrobial agents and chemotherapy

authors： Perez HA,De la Rosa M,Apitz R

更新日期：1994-02-01 00:00:00

abstract：:Methicillin-resistant Staphylococcus aureus (MRSA) has acquired the mecA gene encoding a peptidoglycan transpeptidase, penicillin binding protein 2a (PBP2a), which has decreased affinity for β-lactams. Quickly spreading and highly virulent community-acquired (CA) MRSA strains recently emerged as a frequent cause of in...

journal_title：Antimicrobial agents and chemotherapy

authors： Bæk KT,Gründling A,Mogensen RG,Thøgersen L,Petersen A,Paulander W,Frees D

更新日期：2014-08-01 00:00:00

abstract：:The frequency of alleles with triple mutations conferring sulfadoxine-pyrimethamine (SP) resistance in the Peruvian Amazon Basin has declined (16.9% for dhfr and 0% for dhps compared to 47% for both alleles in 1997) 5 years after SP was replaced as the first-line treatment for Plasmodium falciparum malaria. Microsatel...

journal_title：Antimicrobial agents and chemotherapy

authors： Zhou Z,Griffing SM,de Oliveira AM,McCollum AM,Quezada WM,Arrospide N,Escalante AA,Udhayakumar V

更新日期：2008-02-01 00:00:00

abstract：:We studied the DNA sequence variation of van genes of 34 isolates of Enterococcus spp. The isolates containing the vanB gene exhibited between 0 and 41 base pair changes per 801 bp studied when the vanB sequences were compared to that of the reference strain Enterococcus faecalis V583. The isolates carrying the vanC-2...

journal_title：Antimicrobial agents and chemotherapy

authors： Patel R,Uhl JR,Kohner P,Hopkins MK,Steckelberg JM,Kline B,Cockerill FR 3rd

更新日期：1998-01-01 00:00:00

abstract：:The pharmacokinetics and penetration into a cantharidine-induced inflammatory exudate of meropenem was studied in six volunteers following a single 1-g intravenous dose. Concentrations in plasma, urine, and the inflammatory exudate were determined by a microbiological assay. The mean elimination half-life of meropenem...

journal_title：Antimicrobial agents and chemotherapy

authors： Wise R,Logan M,Cooper M,Ashby JP,Andrews JM

更新日期：1990-08-01 00:00:00

abstract：:Desbutyl-benflumetol (DBB) is a novel antimalarial compound closely related to benflumetol (lumefantrine), of which it is a putative metabolite. The in vitro response of Plasmodium falciparum to DBB was studied in Mae Hong Son and Mae Sot, in northwest Thailand, in 1997 and 1998. In total, 155 fresh isolates were succ...

journal_title：Antimicrobial agents and chemotherapy

authors： Noedl H,Allmendinger T,Prajakwong S,Wernsdorfer G,Wernsdorfer WH

更新日期：2001-07-01 00:00:00

abstract：:A new rifampin resistance gene, arr-2, has been found in Pseudomonas aeruginosa. The ARR-2 protein shows 54% amino acid identity to the rifampin ADP-ribosylating transferase encoded by the arr gene from Mycobacterium smegmatis. This arr-2 gene is located on a gene cassette within a class I integron. ...

journal_title：Antimicrobial agents and chemotherapy

authors： Tribuddharat C,Fennewald M

更新日期：1999-04-01 00:00:00

abstract：:The antibacterial activities of K-4619 (3-de-O-methylsporaricin A sulfate) were compared with those of sporaricin A, amikacin, dibekacin, and gentamicin. K-4619 exhibited a high order of activity against gram-positive and gram-negative bacteria, including Pseudomonas aeruginosa. Its activity against Providencia specie...

journal_title：Antimicrobial agents and chemotherapy

authors： Saino Y,Hattori Y,Koshi T,Kobayashi F,Oda T,Mitsuhashi S

更新日期：1984-08-01 00:00:00

abstract：:We identified GRL-1388 and -1398, potent nonpeptidic human immunodeficiency virus type 1 (HIV-1) protease inhibitors (PIs) containing a bicyclic P2 functional moiety, tetrahydropyrano-tetrahydrofuran (Tp-THF). GRL-1388 was as potent as darunavir (DRV) against various drug-resistant HIV-1 laboratory strains with 50% ef...

journal_title：Antimicrobial agents and chemotherapy

authors： Ide K,Aoki M,Amano M,Koh Y,Yedidi RS,Das D,Leschenko S,Chapsal B,Ghosh AK,Mitsuya H

更新日期：2011-04-01 00:00:00

abstract：:Invasive and allergic infections by Aspergillus flavus are more common in tropical and subtropical countries. The emergence of voriconazole (VRC) resistance in A. flavus impacts the management of aspergillosis, as azoles are used as the first-line and empirical therapy. We screened 120 molecularly confirmed A. flavus ...

journal_title：Antimicrobial agents and chemotherapy

authors： Sharma C,Kumar R,Kumar N,Masih A,Gupta D,Chowdhary A

更新日期：2018-02-23 00:00:00

abstract：:During HIV-1 reverse transcription, there are increasing opportunities for nucleos(t)ide (NRTI) or nonnucleoside (NNRTI) reverse transcriptase (RT) inhibitors to stop elongation of the nascent viral DNA (vDNA). In addition, RT inhibitors appear to influence the kinetics of vDNA synthesis differently. While cell-free k...

journal_title：Antimicrobial agents and chemotherapy

authors： Abram ME,Tsiang M,White KL,Callebaut C,Miller MD

更新日期：2015-02-01 00:00:00

abstract：:Two 3-alkyl-substituted 2-hydroxy-1,4-naphthoquinones, NSC 113452 (NSC52) and NSC 113455 (NSC55), were evaluated for activity against Toxoplasma gondii in vitro and in murine models of acute toxoplasmosis. In vitro, both NSC52 and NSC55 significantly inhibited intracellular replication of T. gondii. In vivo, each comp...

journal_title：Antimicrobial agents and chemotherapy

authors： Khan AA,Nasr M,Araujo FG

更新日期：1998-09-01 00:00:00

abstract：:Although guidelines recommend amikacin (AMK) inhalation therapy for difficult-to-treat nontuberculous mycobacterial lung disease (NTM-LD), data are limited regarding the safety and clinical efficacy of this salvage therapy. We retrospectively evaluated the treatment outcomes of 77 patients with refractory NTM-LD cause...

journal_title：Antimicrobial agents and chemotherapy

authors： Jhun BW,Yang B,Moon SM,Lee H,Park HY,Jeon K,Kwon OJ,Ahn J,Moon IJ,Shin SJ,Daley CL,Koh WJ

更新日期：2018-06-26 00:00:00

abstract：:The efficacy of a new class of drugs for Pneumocystis carinii pneumonitis was demonstrated. 566C80, a hydroxynaphthoquinone, administered orally in a dose of greater than or equal to 100 mg/kg of body weight per day prophylactically prevented P. carinii pneumonitis in 90% or more of rats, while all untreated control a...

journal_title：Antimicrobial agents and chemotherapy

authors： Hughes WT,Gray VL,Gutteridge WE,Latter VS,Pudney M

更新日期：1990-02-01 00:00:00

abstract：:Ribavirin (RBV) is a broad-spectrum antiviral agent that inhibits the production of infectious Hantaan virus (HTNV). Although the mechanism of action of RBV against HTNV is not understood, RBV is metabolized in human cells to both RBV-5'-monophosphate, which inhibits IMP dehydrogenase, resulting in a decrease in intra...

journal_title：Antimicrobial agents and chemotherapy

authors： Sun Y,Chung DH,Chu YK,Jonsson CB,Parker WB

更新日期：2007-01-01 00:00:00

abstract：:Azithromycin concentrations in the tonsils of 56 pediatric patients, treated with 10 or 20 mg of the drug per kg of body weight for 3 days, were compared. Azithromycin levels in plasma and tonsil samples were determined up to 8.5 days after the last dose. The 20-mg/kg regimen resulted in an improved tonsillar distribu...

journal_title：Antimicrobial agents and chemotherapy

authors： Blandizzi C,Malizia T,Batoni G,Ghelardi E,Baschiera F,Bruschini P,Senesi S,Campa M,Del Tacca M

更新日期：2002-05-01 00:00:00

abstract：:Two types of polycations with pendant active groups were synthesized: one is polymethacrylate containing pendant biguanide units, and the other is poly(vinylbenzyl ammonium chloride). The two polycations were found to exhibit higher bactericidal activity against Staphylococcus aureus than the corresponding monomers. F...

journal_title：Antimicrobial agents and chemotherapy

authors： Ikeda T,Hirayama H,Yamaguchi H,Tazuke S,Watanabe M

更新日期：1986-07-01 00:00:00