Strength and regulation of the different promoters for chromosomal beta-lactamases of Klebsiella oxytoca.

abstract：:A series of twelve recently synthesized 6-substituted derivatives of 9-beta-d-ribofuranosylpurine 3',5'-cyclic phosphate (RPcMP) were evaluated for in vitro antiviral activity, using inhibition of viral cytopathogenic effect as the primary parameter for evaluation. Inhibition of the development of intra- and extracell...

journal_title：Antimicrobial agents and chemotherapy

authors： Sidwell RW,Huffman JH,Allen LB,Meyer RB Jr,Shuman DA,Simon LN,Robins RK

更新日期：1974-06-01 00:00:00

abstract：:Beta-l-2',3'-didehydro-2',3'-dideoxy-N(4)-hydroxycytidine (l-Hyd4C) was demonstrated to be an effective and highly selective inhibitor of hepatitis B virus (HBV) replication in HepG2.2.15 cells (50% effective dose [ED(50)] = 0.03 microM; 50% cytotoxic dose [CD(50)] = 2,500 microM). In the present study, we investigate...

journal_title：Antimicrobial agents and chemotherapy

authors： Matthes E,Bünger H

更新日期：2010-01-01 00:00:00

abstract：:Cilastatin inhibits dehydropeptidase-I, a zinc metaloenzyme that metabolizes imipenem. Because zinc stabilizes the mammalian superoxide dismutase, we postulated that cilastatin would also inhibit the dismutase. Cilastatin concentrations at levels threefold higher than those expected in urine, however, did not inhibit ...

journal_title：Antimicrobial agents and chemotherapy

authors： Proctor RA,Textor JA

更新日期：1985-11-01 00:00:00

abstract：:Kill-kinetic methods were used to provide data on the bactericidal activity of subinhibitory (0.5x MIC), inhibitory (1x MIC), and suprainhibitory (4x MIC) concentrations of LY146032 against methicillin-susceptible and -resistant Staphylococcus aureus and Staphylococcus epidermidis. These bactericidal activities were c...

journal_title：Antimicrobial agents and chemotherapy

authors： Stratton CW,Liu C,Weeks LS

更新日期：1987-08-01 00:00:00

abstract：:A remarkably high rate of adverse events is associated with the use of trimethoprim-sulfamethoxazole in patients with human immunodeficiency virus type 1 infection. We examined the efficacies of sulfonamides alone in the prevention of Pneumocystis carinii pneumonitis, with the assumption that at least some of the adve...

journal_title：Antimicrobial agents and chemotherapy

authors： Hughes WT,Killmar J

更新日期：1996-04-01 00:00:00

abstract：:A total of 636 vancomycin-resistant Enterococcus faecium (VRE) isolates that had been obtained between 1994 and 1999 from the Medical School Hospital of the University of Michigan, Ann Arbor, were tested for bacteriocin production. Two hundred seventy-seven (44%) of the strains were bacteriocinogenic; and 193 of these...

journal_title：Antimicrobial agents and chemotherapy

authors： Inoue T,Tomita H,Ike Y

更新日期：2006-04-01 00:00:00

abstract：:The diversity and evolution of the class A OXY beta-lactamase from Klebsiella oxytoca were investigated and compared to housekeeping gene diversity. The entire bla(OXY) coding region was sequenced in 18 clinical isolates representative of the four K. oxytoca beta-lactamase gene groups bla(OXY-1) to bla(OXY-4) and of t...

journal_title：Antimicrobial agents and chemotherapy

authors： Fevre C,Jbel M,Passet V,Weill FX,Grimont PA,Brisse S

更新日期：2005-08-01 00:00:00

abstract：:Ampicillin and erythromycin were shown to act synergistically in vitro against the majority of strains of Nocardia asteroides tested. With these strains, the minimal inhibiting concentration (MIC) of each drug when combined was reduced 4- to more than 512-fold as compared with the MIC of each antibiotic acting individ...

journal_title：Antimicrobial agents and chemotherapy

authors： Finland M,Bach MC,Garner C,Gold O

更新日期：1974-03-01 00:00:00

abstract：:The aim of this study was to reveal population pharmacokinetics and assess the efficacies of various dosage regimens of sulbactam in terms of the probability of target attainment with this agent over a range of MICs. Monte Carlo simulations were performed to determine the probability of attaining specific pharmacodyna...

journal_title：Antimicrobial agents and chemotherapy

authors： Jaruratanasirikul S,Wongpoowarak W,Aeinlang N,Jullangkoon M

更新日期：2013-07-01 00:00:00

abstract：:beta-Lactamases produced by urine isolates from patients in long-term care facilities (LTCFs), outpatient, clinics, and one hospital in a U.S. community were characterized. A total of 1.3% of all Escherichia coli and Klebsiella pneumoniae isolates collected from patients in 30 LTCFs and various outpatient clinics prod...

journal_title：Antimicrobial agents and chemotherapy

authors： Hanson ND,Moland ES,Hong SG,Propst K,Novak DJ,Cavalieri SJ

更新日期：2008-10-01 00:00:00

abstract：:Malaria and trypanosomiasis are diseases which afflict millions and for which novel therapies are urgently required. We have tested two well-characterized cell-penetrating peptides (CPPs) for antiparasitic activity. One CPP, designated TP10, has broad-spectrum antiparasitic activity against Plasmodium falciparum, both...

journal_title：Antimicrobial agents and chemotherapy

authors： Arrighi RB,Ebikeme C,Jiang Y,Ranford-Cartwright L,Barrett MP,Langel U,Faye I

更新日期：2008-09-01 00:00:00

abstract：:Seven clinical isolates of Shigella sonnei with reduced susceptibilities to fluoroquinolones (sparfloxacin, ciprofloxacin, and ofloxacin) were obtained. The MICs of fluoroquinolones against these S. sonnei strains were 16 to 32 times higher than those obtained against typical strains that are highly susceptible to the...

journal_title：Antimicrobial agents and chemotherapy

authors： Horiuchi S,Inagaki Y,Yamamoto N,Okamura N,Imagawa Y,Nakaya R

更新日期：1993-11-01 00:00:00

abstract：:The efficacy and safety of oral LY217896 for prevention of experimental influenza A/Kawasaki/86 (H1N1) virus infection were assessed in susceptible males randomly assigned to receive LY217896 (75 mg) or placebo once daily for 7 days beginning 24 h prior to viral challenge. The rates of virus shedding (100% in both gro...

journal_title：Antimicrobial agents and chemotherapy

authors： Hayden FG,Tunkel AR,Treanor JJ,Betts RF,Allerheiligen S,Harris J

更新日期：1994-05-01 00:00:00

abstract：:Previous studies on tetracycline transport into Staphylococcus aureus identified a high-affinity, saturable uptake system for the antibiotic (Km, 4.76 microM) (B.L. Hutchings, Biochim. Biophys. Acta 174:734-738, 1969). However, the earlier results could not be confirmed using conditions that permitted energy-dependent...

journal_title：Antimicrobial agents and chemotherapy

authors： Chopra I,Ismail S,Oliva B

更新日期：1991-12-01 00:00:00

abstract：:The DNA sequences of two plasmids carrying vanA, pVEF1 (39,626 bp) and pVEF2 (39,714 bp), were determined. Forty-three shared coding sequences were identified, and the only nucleotide difference was an 88-bp indel. A postsegregational killing system was identified. This system possibly explains the persistence of the ...

journal_title：Antimicrobial agents and chemotherapy

authors： Sletvold H,Johnsen PJ,Simonsen GS,Aasnaes B,Sundsfjord A,Nielsen KM

更新日期：2007-02-01 00:00:00

abstract：:Toxoplasma gondii is a cosmopolitan protozoan parasite which affects approximately 30% of the population worldwide. The drugs currently used against toxoplasmosis are few in number and show several limitations, such as drug intolerance, poor bioavailability, or drug resistance mechanism developed by the parasite. Thus...

journal_title：Antimicrobial agents and chemotherapy

authors： Spalenka J,Escotte-Binet S,Bakiri A,Hubert J,Renault JH,Velard F,Duchateau S,Aubert D,Huguenin A,Villena I

更新日期：2018-01-25 00:00:00

abstract：:Ribonucleic acid (RNA) synthesis in the sorbitol-dependent, fragile yeast mutant VY1160 (Venkov et al., 1974) is rapidly inhibited by rifampin. The growth of the mutant cells and protein synthesis are more slowly affected by the antibiotic, apparently as secondary phenomena. Lower doses of rifampin (50 to 100 mug/ml) ...

journal_title：Antimicrobial agents and chemotherapy

authors： Venkov PV,Milchev GI,Hadjiolov AA

更新日期：1975-12-01 00:00:00

abstract：:Mice treated with antibiotics early or late after active infection had resolved were examined for chlamydial DNA in endocervical swabs. The early eradication of infection limited oviduct pathology, despite the continued detection of chlamydial DNA by nested PCR. Late antibiotic treatment had no effect on the ability t...

journal_title：Antimicrobial agents and chemotherapy

authors： Reeves DM,Nagarajan U,O'Connell C,Andrews CW Jr,Darville T

更新日期：2007-07-01 00:00:00

abstract：:The susceptibilities to 20 antimicrobial agents of Bordetella bronchiseptica variants in C mode and degraded phases were compared with those of their parents in X mode. Increases in MICs of 4- to 32-fold were observed for ampicillin, carbenicillin, erythromycin, novobiocin, rifampin, chloramphenicol, nalidixic acid, a...

journal_title：Antimicrobial agents and chemotherapy

authors： Ishikawa H,Isayama Y,Ohmae K

更新日期：1988-12-01 00:00:00

abstract：:The combination of liposomal amphotericin B (LAMB) and caspofungin (CAS) holds promise to improve the outcome of opportunistic invasive mycoses with poor prognosis. Little is known, however, about the safety and pharmacokinetics of the combination in patients at high risk for these infections. The safety and pharmacok...

journal_title：Antimicrobial agents and chemotherapy

authors： Groll AH,Silling G,Young C,Schwerdtfeger R,Ostermann H,Heinz WJ,Gerss J,Kolve H,Lanvers-Kaminsky C,Vieira Pinheiro JP,Gammelin S,Cornely OA,Wuerthwein G

更新日期：2010-10-01 00:00:00

abstract：:Chloramphenicol acetyltransferases specified by fi(-) (F fertility-noninhibiting) R factors were compared with those specified by the fi(+) R factors R1, 222, and R6-S. Three classes of enzyme were distinguished: class I was determined by group N fi(-) R factors and was indistinguishable from the enzyme determined by ...

journal_title：Antimicrobial agents and chemotherapy

authors： Foster TJ,Shaw WV

更新日期：1973-01-01 00:00:00

abstract：:Between February and June of 1997, a large number of community-acquired respiratory tract isolates of Haemophilus influenzae (n = 1,077) and Moraxella catarrhalis (n = 503) from 27 U.S. and 7 Canadian medical centers were characterized as part of the SENTRY Antimicrobial Surveillance Program. Overall prevalences of be...

journal_title：Antimicrobial agents and chemotherapy

authors： Doern GV,Jones RN,Pfaller MA,Kugler K

更新日期：1999-02-01 00:00:00

abstract：:The ability of LM cells, thymidine kinase-deficient LM cells (LMTK-), and LMTK- cells transformed to the LMTK+ phenotype by herpes simplex virus type 1 genetic information (LH7 cells) to anabolize the acyclovir congener ganciclovir was examined. About 50-fold more ganciclovir triphosphate was produced by LH7 cells tha...

journal_title：Antimicrobial agents and chemotherapy

authors： St Clair MH,Lambe CU,Furman PA

更新日期：1987-06-01 00:00:00

abstract：:Antagonism, determined by isobolograms constructed from data from combinations of ampicillin and chloramphenicol at or below the minimal inhibitory or bactericidal concentrations, was observed against 13 clinical isolates of meningococcus and against one isolate of pneumococcus. Synergy occurred against six strains of...

journal_title：Antimicrobial agents and chemotherapy

authors： Feldman WE,Zweighaft T

更新日期：1979-02-01 00:00:00

abstract：:Twenty-seven patients with advanced malignancies were given 200 mg of ketoconazole orally every 6 or 12 h. Blood samples were collected during these intervals and after the last dose to determine plasma concentrations and half-lives. The mean plasma concentrations measured after the initial dose were 1.7 +/- 1.1 micro...

journal_title：Antimicrobial agents and chemotherapy

authors： Maksymiuk AW,Levine HB,Bodey GP

更新日期：1982-07-01 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：:The effectiveness of gatifloxacin therapy (15 mg/kg every 5 h [q5h]) was compared with that of meropenem (75 mg/kg q5h) and cefotaxime (75 mg/kg q5h) therapy in experimental meningitis caused by a beta-lactamase-producing strain of Escherichia coli. Gatifloxacin therapy was more rapidly bactericidal than cefotaxime bu...

journal_title：Antimicrobial agents and chemotherapy

authors： Lutsar I,Friedland IR,Jafri HS,Wubbel L,Ng W,Ghaffar F,McCracken GH Jr

更新日期：1999-07-01 00:00:00

abstract：:The in vitro antifungal activities of two N-aminoacyl derivatives of amphotericin B methyl ester (AME) were compared by tube dilution with those of amphotericin B and AME, using 60 isolates representing 10 yeast species. A total of 70% of the strains were inhibited by concentrations of the N-aminoacyl AME derivatives ...

journal_title：Antimicrobial agents and chemotherapy

authors： Oblack DL,Hewitt WL,Martin WJ

更新日期：1981-01-01 00:00:00

abstract：:The radical-based theory proposes that three major classes of bactericidal antibiotics, i.e., β-lactams, quinolones, and aminoglycosides, have in common the downstream formation of lethal levels of reactive oxygen species (ROS) as part of the killing mechanism. If bactericidal antibiotics exhibit a common mechanism, t...

journal_title：Antimicrobial agents and chemotherapy

authors： Hoeksema M,Brul S,Ter Kuile BH

更新日期：2018-05-25 00:00:00

abstract：:Placental drug transfer is important for achieving better pharmacotherapy in pregnant women and in fetuses. In the present study, we examined the effects of anti-hepatitis C virus (HCV) and anti-HIV drugs on organic anion transport in human placental BeWo cells. The cellular uptake of two fluorescence organic anions, ...

journal_title：Antimicrobial agents and chemotherapy

authors： Nabekura T,Kawasaki T,Kamiya Y,Uwai Y

更新日期：2015-12-01 00:00:00