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排序方式: 共有104条查询结果,搜索用时 31 毫秒
1.
G. Kahlmeter D. F. J. Brown F. W. Goldstein A. P. MacGowan J. W. Mouton I. Odenholt A. Rodloff C-J. Soussy M. Steinbakk F. Soriano O. Stetsiouk 《Clinical microbiology and infection》2006,12(6):501-503
The main objectives of the European Committee on Antimicrobial Susceptibility Testing (EUCAST) are to harmonise breakpoints for antimicrobial agents in Europe, and to act as the breakpoint committee for the European Medicines Agency (EMEA) during the registration of new antimicrobial agents. Detailed EUCAST procedures for harmonising and setting breakpoints for antimicrobial agents are available on the EUCAST website. Beginning with the current issue, a series of EUCAST Technical Notes will be published in CMI, based on the rationale documents produced by EUCAST for each of the antimicrobial agents studied, with the aim of highlighting important background information underlying decisions on breakpoints made by EUCAST. 相似文献
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Cattoir V Merabet L Legrand P Soussy CJ Leclercq R 《The Journal of antimicrobial chemotherapy》2007,59(5):1010-1012
OBJECTIVES: The aim of this study was to characterize the mechanism of resistance to macrolides and streptogramins of a Streptococcus pneumoniae strain isolated from blood cultures in an 80-year-old patient suffering from severe pneumonia unsuccessfully treated with pristinamycin. METHODS: Resistance genes erm(B) and mef(A) were searched for by PCR. Portions of genes for domains V and II of the 23S rRNA (rrl) and genes for ribosomal proteins L4 (rplD) and L22 (rplV) were amplified by PCR from total genomic DNA and sequenced. RESULTS: Resistance genes erm(B) and mef(A) were not detected. Only mutation in the rplV gene encoding ribosomal protein L22 was detected. The strain contained a six amino acid insertion ((107)KRTAHI(108)) in the C-terminus of the ribosomal protein L22. CONCLUSIONS: This is the first report of emergence of a pneumococcus resistant to streptogramins by mutation in ribosomal protein L22 during treatment with pristinamycin. 相似文献
4.
Frequent association between alteration of the rdxA gene and metronidazole resistance in French and North African isolates of Helicobacter pylori 总被引:2,自引:0,他引:2
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Tankovic J Lamarque D Delchier JC Soussy CJ Labigne A Jenks PJ 《Antimicrobial agents and chemotherapy》2000,44(3):608-613
Mutations in the rdxA gene have been associated with the acquisition of resistance to metronidazole in Helicobacter pylori. This gene encodes an NADPH nitroreductase whose expression is necessary for intracellular activation of the drug. We wished to examine whether mutations in rdxA were present in resistant H. pylori isolates infecting either French or North African patients. We determined the complete nucleotide sequences of the rdxA genes from seven French and six North African patients infected with paired resistant and sensitive strains. Genotyping by random amplified polymorphic DNA analysis confirmed the close genetic relatedness of the susceptible and resistant isolates from individual biopsies. Eight French and five North African individual resistant strains were also studied. For the French strains, an alteration in rdxA most probably implicated in resistance was found in 10 cases (seven frameshift mutations, two missense mutations, and one deletion of 211 bp). One to three putative missense mutations were identified in four cases, and a missense mutation possibly not implicated in resistance was discovered in the last case. For the North African strains, an alteration in rdxA was found in eight cases (three frameshift mutations, three missense mutations, one deletion of 6 bp, and one insertion of a variant of IS605). Two strains contained putative missense mutations, and no change was observed in rdxA of the last strain. Thus, inactivation of the rdxA gene is frequently, but not always, associated with resistance to metronidazole in French and North African clinical isolates of H. pylori. In addition, a variety of alterations of rdxA are associated with the resistant phenotype. 相似文献
5.
Group C streptococcal meningitis in adults 总被引:1,自引:0,他引:1
6.
Oxacillin prophylaxis in cerebrospinal fluid shunt procedures: results of a randomized open study in 60 hydrocephalic patients 总被引:2,自引:0,他引:2
A 27-month open randomized trial (October 1981-January 1984) was carried out to study the prophylactic efficacy of antibiotics in 60 hydrocephalic patients being shunted for the first time. The treatment group received oxacillin at a dosage of 200 mg/kg/day by six bolus intravenous injections, beginning with anesthetic induction and continuing for 24 hours after the operations. The minimum postoperative observation was 6 months. Six patients in the control group developed cerebrospinal fluid infections (20%) as compared with only a single patient in the oxacillin group (3.3%); this difference was statistically significant (p less than 0.05). Time of development of cerebrospinal fluid infection was brief (86% at 6 weeks), and as usual staphylococci were the pathogens most frequently implicated. This study would appear to confirm the choice of oxacillin for prevention of meningitis. Nevertheless, the frequency of methicillin-resistant staphylococci, which account for 20% of nosocomial staphylococcal infections, constitutes a limiting factor for such prevention. 相似文献
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8.
Yang K Azoulay E Attalah L Zahar JR Van de Louw A Cerf C Soussy CJ Duvaldestin P Brochard L Brun-Buisson C Harf A Delclaux C 《Intensive care medicine》2003,29(3):396-402
OBJECTIVE: Neutrophil function impairment is common in nonneutropenic critically ill patients. Whether granulocyte colony-stimulating factor (G-CSF) may be useful for preventing nosocomial infection in these patients is debated. The response of blood neutrophils from critically ill patients to G-CSF was investigated in vitro. DESIGN AND SETTING: Prospective study, laboratory investigation in two intensive care units. PATIENTS: 52 critically ill patients without immunosuppression. MEASUREMENTS: Neutrophils obtained from 52 patients on the 5th day of their intensive care unit stay were incubated with and without G-CSF (1, 10, 100 ng/ml). Reactive oxygen species (ROS) release and bactericidal activity against Staphylococcus aureus and Pseudomonas aeruginosa were evaluated. Plasma cytokines (interleukin 10, tumor necrosis factor alpha, and G-CSF) were measured. RESULTS: Median values (25th-75th percentiles) indicated no stimulatory effect of G-CSF on neutrophil bactericidal activity against either organism: S. aureus, 100% (95-109) of the unstimulated condition with 1 ng/ml G-CSF, and P. aeruginosa, 102% (98-109) with 1 ng/ml G-CSF. However, wide interindividual variability was found, ranging from marked inhibition to marked stimulation. Similar variability was found for ROS release. No correlations were found between ROS release and bactericidal activities against either bacterial strain. Inhibition of neutrophil bactericidal activity by G-CSF was associated with significantly higher plasma interleukin 10 concentrations. Plasma G-CSF levels were significantly higher in patients whose neutrophil bactericidal activity was unresponsive to G-CSF, suggesting G-CSF receptor downregulation. CONCLUSIONS: The effect of G-CSF on in vitro neutrophil bactericidal activity varied widely, depending on endogenous levels of G-CSF and was not predictable based on severity scores. 相似文献
9.
Beneficial effect of an inhibitor of leukocyte elastase (EPI-hNE-4) in presence of repeated lung injuries 总被引:1,自引:0,他引:1
Honoré S Attalah HL Azoulay E Soussy CJ Saudubray F Harf A Brochard L Delclaux C 《Shock (Augusta, Ga.)》2004,22(2):131-136
Persistence of alveolar neutrophil influx and activation may enhance the fibrotic process after acute lung injury. On the other hand, elastase has an antimicrobial activity and could participate in neutrophil migration, both events being critically important in host defense, explaining the controversial issue of therapeutic elastase inhibition in the setting of acute lung injury. We assessed the effect of a neutrophil elastase inhibitor, EPI-hNE-4, in single (bleomycin, 1.2 mg/rat intratracheally) and repeated (bleomycin, 1.2 mg/rat plus endotoxin and 1 mg/kg intratracheally 24 h later) lung injuries to assess the role of neutrophil in fibrosis. Subsequently, the effect of EPI-hNE-4 on bacterial clearance was evaluated during Pseudomonas aeruginosa-induced pneumonia. In the single injury model, despite a dramatic reduction of alveolar neutrophil influx with EPI-hNE-4 treatment, no significant inhibition of the decrease in respiratory system compliance, an index of lung fibrosis, was demonstrated at day 14. In the repeated injury model, EPI-hNE-4 treatment afforded a significant protective effect on compliance and alveolar inflammation at day 14. During bacterial pneumonia, EPI-hNE4 did not modify alveolar neutrophil recruitment or bacterial clearance from bronchoalveolar lavage fluid and lung homogenate. In conclusion, EPI-hNE-4, a specific inhibitor of leukocyte elastase, afforded a partial protective effect on the respiratory system compliance during repeated lung injuries, and had no detrimental effect during a gram-negative bacterial pneumonia. 相似文献
10.
C. Lascols P. Legrand A. M��rens R. Leclercq L. Armand-Lefevre H. B. Drugeon M. D. Kitzis C. Muller-Serieys M. E. Reverdy M. Roussel-Delvallez C. Moubareck A. Lemire A. Miara M. Gjoklaj C.-J. Soussy 《European journal of clinical microbiology & infectious diseases》2011,30(4):475-482
The aims of the study were to determine the in vitro activity of doripenem, a new carbapenem, against a large number of bacterial pathogens and to propose zone diameter breakpoints for clinical categorization in France according to the European Committee on Antimicrobial Susceptibility Testing (EUCAST) minimum inhibitory concentration (MIC) breakpoints. The MICs of doripenem were determined by the broth microdilution method against 1,547 clinical isolates from eight French hospitals. The disk diffusion test was performed (10-??g discs) according to the Comité de l??Antibiogramme de la Société Fran?aise de Microbiologie (CASFM) method. The MIC50/90 (mg/L) values were as follows: methicillin-susceptible Staphylococcus aureus (MSSA) (0.03/0.25), methicillin-resistant Staphylococcus aureus (MRSA) (1/2), methicillin-susceptible coagulase-negative staphylococci (MSCoNS) (0.03/0.12), methicillin-resistant coagulase-negative staphylococci (MRCoNS) (2/8), Streptococcus pneumoniae (0.016/0.25), viridans group streptococci (0.016/2), ??-hemolytic streptococci (??0.008/??0.008), Enterococcus faecalis (2/4), Enterococcus faecium (128/>128), Enterobacteriaceae (0.06/0.25), Pseudomonas aeruginosa (0.5/8), Acinetobacter baumannii (0.25/2), Haemophilus influenzae (0.12/0.25), and Moraxella catarrhalis (0.03/0.06). According to the regression curve, the zone diameter breakpoints were 24 and 19?mm for MICs of 1 and 4?mg/L, respectively. This study confirms the potent in vitro activity of doripenem against Pseudomonas aeruginosa, Acinetobacter, Enterobacteriaceae, MSSA, MSCoNS, and respiratory pathogens. According to the EUCAST MIC breakpoints (mg/L) ??1/>4 for Enterobacteriaceae, Pseudomonas aeruginosa, and Acinetobacter, and ??1/>1 for streptococci, pneumococci, and Haemophilus, the zone diameter breakpoints could be (mm) ??24/<19 and ??24/<24, respectively. 相似文献