Abstract:
:The motility of viable Trichomonas vaginalis organisms is readily demonstrable in a clinical wet mount or cultured specimens. We attempted to determine whether migration is a dynamic process such that the organisms move to avoid exposure to toxic antimicrobial agents. With the use of axenic cultures of T. vaginalis that were radiolabeled and assayed for chemotaxis in plastic multiwelled plates with a membrane filter inserted to trap organisms, the response of clinical isolates to various antimicrobial agents was studied. Chemotaxis was readily demonstrable and dependent upon factors including time of incubation, media used, and viscosity of media. Nitroimidazoles (e.g., metronidazole) which readily inhibited the growth of these organisms also caused significant chemorepulsion after minutes of exposure. The antifungal imidazoles ketoconazole and miconazole inhibited growth nearly as readily and caused chemorepulsion, but to a lesser degree. The spermicide Nonoxynol-9 also inhibited growth and caused significant chemorepulsion. The minimal concentrations of many compounds which inhibited growth were very similar to those which caused significant chemorepulsion. Imidazole and antibiotics (e.g., penicillin) which did not inhibit growth did not induce any chemotactic effects. Chemotaxis of T. vaginalis is an active and dynamic process, and the organisms display chemorepulsion shortly after exposure to toxic antimicrobial agents, well before toxicity can be demonstrated.
journal_name
Antimicrob Agents Chemotherjournal_title
Antimicrobial agents and chemotherapyauthors
Sugarman B,Mummaw Ndoi
10.1128/aac.32.9.1323subject
Has Abstractpub_date
1988-09-01 00:00:00pages
1323-6issue
9eissn
0066-4804issn
1098-6596journal_volume
32pub_type
杂志文章abstract::Titanium (Ti) is a promising candidate biomaterial for an artificial corneal skirt. Antimicrobial peptide (AMP) immobilization may improve the bactericidal effect of the Ti substrate. In this study, we tested the bactericidal efficacy of a functionalized Ti surface in a rabbit keratitis model. A corneal stromal pocket...
journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
doi:10.1128/AAC.02859-14
更新日期:2014-09-01 00:00:00
abstract::Antagonism of antibiotic activity by peritoneal dialysate has been postulated to be a cause of failure of treatment of peritonitis complicating continuous ambulatory peritoneal dialysis. We evaluated by a case-control study whether unexpected treatment failure could be attributed to such antagonism. Bacteria isolated ...
journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
doi:10.1128/aac.36.5.1097
更新日期:1992-05-01 00:00:00
abstract::The activity of the pradimicin derivative BMS 181184 was evaluated in a model of invasive pulmonary aspergillosis in persistently neutropenic rabbits and compared with that of amphotericin B deoxycholate. BMS 181184 at total daily doses of 50 and 150 mg/kg of body weight was at least as effective as amphotericin B at ...
journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
doi:10.1128/AAC.42.9.2399
更新日期:1998-09-01 00:00:00
abstract::The aim of this study was to investigate the variability of the voriconazole plasma level and its relationships with clinical outcomes and adverse events among liver transplant recipients to optimize the efficacy and safety of their treatment. Liver transplant recipients treated with voriconazole were included, and vo...
journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
doi:10.1128/AAC.01211-17
更新日期:2017-11-22 00:00:00
abstract::We compared the kinetics of amphotericin B (AMB) lung accumulation and fungal clearance by liposomal amphotericin B (L-AMB) and amphotericin B lipid complex (ABLC) in a neutropenic murine model of invasive pulmonary mucormycosis (IPM). Immunosuppressed BALB/c mice were inoculated with 1 x 10(6) Rhizopus oryzae spores ...
journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
doi:10.1128/AAC.01222-09
更新日期:2010-03-01 00:00:00
abstract::A simple technique with antibiotic-impregnated disks has been developed to demonstrate the antibiotic synergism of penicillins and aminoglycosides against enterococci. The two antibiotic disks are placed on inoculated plates so that the distance between their centers is less than the sum of the two radii of their prev...
journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
doi:10.1128/aac.7.1.82
更新日期:1975-01-01 00:00:00
abstract::The interaction between four fluoroquinolones (ciprofloxacin, norfloxacin, pefloxacin, and ofloxacin) and biofilms of Pseudomonas aeruginosa in wells of microtiter plates and on segments of vascular catheters were studied in an in vitro model of vascular catheter colonization. Subinhibitory concentrations (one-half, o...
journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
doi:10.1128/aac.39.10.2262
更新日期:1995-10-01 00:00:00
abstract::The chromosome-encoded class C β-lactamase CHE-1 produced by Enterobacter cloacae exhibits a lower sensitivity to avibactam than the P99 enzyme from which it is derived by a 6-residue deletion in the H-10 helix. In the present study, we investigated the sensitivity of CHE-1 to two other β-lactamase inhibitors: LK-157 ...
journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
doi:10.1128/AAC.02062-15
更新日期:2016-01-04 00:00:00
abstract::The penicillin-binding proteins (PBPs) of a clinical isolate of Staphylococcus aureus specifically resistant to oral cephalosporins were compared with those of a susceptible strain. In the resistant strain, PBP3 (75,000 molecular weight) was missing or had substantially (greater than 100-fold) reduced affinity for pen...
journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
doi:10.1128/aac.22.1.172
更新日期:1982-07-01 00:00:00
abstract::We studied the activity of voriconazole against 400 clinical strains of Aspergillus from the pre-voriconazole (1999 to 2002) and post-voriconazole (2003 to 2007) periods. Although the mean MICs of strains from the post-voriconazole period were slightly higher (0.39 versus 0.57 microg/ml; P < 0.001), all strains were s...
journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
doi:10.1128/AAC.00629-08
更新日期:2008-09-01 00:00:00
abstract::The current recommendations for intravenous (i.v.) acyclovir dosing in obese patients suggest using ideal body weight (IBW) rather than total body weight (TBW). To our knowledge, no pharmacokinetic analysis has validated this recommendation. This single-dose pharmacokinetic study was conducted in an inpatient oncology...
journal_title:Antimicrobial agents and chemotherapy
pub_type: 临床试验,杂志文章
doi:10.1128/AAC.02010-15
更新日期:2016-01-11 00:00:00
abstract::The indinavir dosage regimen currently used for human immunodeficiency virus (HIV)-infected children is not based on pharmacokinetic data obtained in the target patient population. The purpose of our study was to characterize indinavir pharmacokinetics and pharmacodynamics in HIV-infected children. Eleven children (ag...
journal_title:Antimicrobial agents and chemotherapy
pub_type: 临床试验,杂志文章
doi:10.1128/aac.44.3.752-755.2000
更新日期:2000-03-01 00:00:00
abstract::The human fungal pathogen Candida albicans develops drug resistance after long-term exposure to azole drugs in the treatment of chronic candidiasis. Gain-of-function (GOF) mutations in the transcription factor Tac1 and the consequent expression of its targets, drug efflux pumps Cdr1 and Cdr2, are a common mechanism by...
journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
doi:10.1128/AAC.01342-17
更新日期:2017-10-24 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
pub_type: 杂志文章
doi:10.1128/aac.19.1.106
更新日期:1981-01-01 00:00:00
abstract::The activity of a new prototype carbapenem, L-695,256, against clinical isolates of gram-positive and gram-negative aerobes was studied in vitro by agar dilution. L-695,256 was highly active against methicillin-resistant and -susceptible isolates of staphylococci (MICs, 0.016 to 2 micrograms/ml) and against penicillin...
journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
doi:10.1128/aac.39.5.1178
更新日期:1995-05-01 00:00:00
abstract::GSK1322322 is a novel inhibitor of peptide deformylase (PDF) with good in vitro activity against bacteria associated with community-acquired pneumonia and skin infections. We have characterized the in vivo pharmacodynamics (PD) of GSK1322322 in immunocompetent animal models of infection with Streptococcus pneumoniae a...
journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
doi:10.1128/AAC.01842-15
更新日期:2015-10-19 00:00:00
abstract::The linkage between the macrolide efflux gene mef(I) and the chloramphenicol inactivation gene catQ was first described in Streptococcus pneumoniae (strain Spn529), where the two genes are located in a module designated IQ element. Subsequently, two different defective IQ elements were detected in Streptococcus pyogen...
journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
doi:10.1128/AAC.03638-14
更新日期:2014-10-01 00:00:00
abstract::Hepatitis C virus (HCV) strains belong to seven genotypes with numerous subtypes that respond differently to antiviral therapies. Genotype 1, and primarily subtype 1b, is the most prevalent genotype worldwide. The development of recombinant HCV infectious cell culture systems for different variants, permitted by the h...
journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
doi:10.1128/AAC.00037-17
更新日期:2017-05-24 00:00:00
abstract::Cefodizime, an iminomethoxy aminothiazolyl cephalosporin similar to moxalactam and ceftazidime, was less active (minimal inhibitory concentration, 1.6 to 12 micrograms) than cefazolin or cefotaxime against Staphylococcus aureus and Staphylococcus epidermidis. It inhibited Haemophilus and Neisseria spp. at less than 0....
journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
doi:10.1128/aac.23.6.907
更新日期:1983-06-01 00:00:00
abstract::Laboratory-based in vitro antimicrobial susceptibility testing is the foundation for guiding anti-infective therapy and monitoring antimicrobial resistance trends. We used whole-genome sequencing (WGS) technology to identify known antimicrobial resistance determinants among strains of nontyphoidal Salmonella and corre...
journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
doi:10.1128/AAC.01030-16
更新日期:2016-08-22 00:00:00
abstract::There is an increasing need for novel drugs and new strategies for the therapy of invasive candidiasis. This study aimed to develop and characterize liposome-based nanoparticles of carvacrol, cinnamaldehyde, citral or thymol with anti-Candida activities. Dioctadecyldimethylammonium bromide- and monoolein-based liposom...
journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
doi:10.1128/AAC.01628-20
更新日期:2021-01-19 00:00:00
abstract::Acute kidney injury (AKI) occurs in a substantial proportion of critically ill patients receiving intravenous colistin. In the pharmacokinetic/toxicodynamic analysis reported here, the relationship of the occurrence of AKI to exposure to colistin and a number of potential patient factors was explored in 153 critically...
journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章,多中心研究
doi:10.1128/AAC.01367-17
更新日期:2017-10-24 00:00:00
abstract::Hepatitis C virus (HCV) genotype (GT) 2 represents approximately 9% of all viral infections globally. While treatment outcomes for GT2-infected patients have improved substantially with direct-acting antiviral agents (DAAs) compared to interferon-α, the presence of polymorphisms in NS5A can impact efficacy of NS5A inh...
journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
doi:10.1128/AAC.01269-19
更新日期:2019-09-16 00:00:00
abstract::For the first time, we report the whole-genome sequence analysis of Chryseobacterium oranimense G311, a multidrug-resistant bacterium, from a cystic fibrosis patient in France, including resistance to colistin. Whole-genome sequencing of C. oranimense G311 was performed using Ion Torrent PGM, and RAST, the EMBL-EBI se...
journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
doi:10.1128/AAC.02417-14
更新日期:2015-03-01 00:00:00
abstract::Tuberculosis (TB) treatment is long and requires multiple drugs, likely due to various phenotypes of TB bacilli with variable drug susceptibilities. Drugs with broad activity are urgently needed. This study aimed to evaluate delamanid's activity against growing or dormant bacilli in vitro as well as in vivo Cultures o...
journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
doi:10.1128/AAC.02402-16
更新日期:2017-05-24 00:00:00
abstract::Seven hundred twenty-three isolates of Moraxella catarrhalis obtained from outpatients with a variety of infections in 30 medical centers in the United States between 1 November 1994 and 30 April 1995 were characterized in a central laboratory. The overall rate of beta-lactamase production was 95.3%. When the National...
journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章,多中心研究
doi:10.1128/AAC.40.12.2884
更新日期:1996-12-01 00:00:00
abstract::The MICs of pyrazinamide (PZA) were determined for Mycobacterium tuberculosis cultivated under different pH conditions in 7H12 liquid medium. Mycobacterial growth was monitored by the radiometric method (BACTEC system; Johnston Laboratories, Inc., Towson, Md.). We observed a predictable eightfold difference between th...
journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
doi:10.1128/aac.32.7.1002
更新日期:1988-07-01 00:00:00
abstract::Acinetobacter baumannii is responsible for severe nosocomial pneumonia. To evaluate new therapeutic regimens for infections due to multiresistant strains and to study the pharmacodynamic properties of various antibiotics, we developed an experimental mouse model of acute A. baumannii pneumonia. C3H/HeN mice rendered t...
journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
doi:10.1128/AAC.41.2.345
更新日期:1997-02-01 00:00:00
abstract::Multidrug-resistant bacteria pose a major challenge to the clinical management of infections in resource-poor settings. Although nontyphoidal Salmonella (NTS) bacteria cause predominantly enteric self-limiting illness in developed countries, NTS is responsible for a huge burden of life-threatening bloodstream infectio...
journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
doi:10.1128/AAC.00078-15
更新日期:2015-01-01 00:00:00
abstract::The activity of four antifungal agents against 15 systemic (blood and vascular catheter) and 10 superficial (skin) Malassezia furfur isolates was evaluated. MIC ranges were similar for the two groups of organisms: amphotericin B, 0.3 to 2.5 micrograms/ml; flucytosine, greater than 100 micrograms/ml; miconazole, 0.4 to...
journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
doi:10.1128/aac.31.6.951
更新日期:1987-06-01 00:00:00