Claude Brunschwig

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1. Epidemiological and experimental data have shown that homocysteine may provoke vascular lesions and that moderate homocysteinaemia may constitute an independent risk factor for vascular disease. It is now documented that homocysteine damages human endothelial cells in culture, possibly by producing hydrogen peroxide in an oxygen-dependent reaction. 2. In(More)
This study was aimed at examining the effect of chronic cigarette smoking on a venous occlusion test. Two groups of young healthy men, a control group of 20 non-smoking subjects and a group of 21 smoking subjects having an average consumption of 17.6 (SD 8.6) were studied. Venous occlusion performed in smokers did not induce a(More)
Spondylodiscitis due to Citrobacter diversus is rare. An unusual case of bifocal cervical spondylodiscitis following transurethral prostatectomy is reported. C. diversus was detected by urinary cultures and locally by intervertebral disc puncture. Satisfactory recovery occurred after treatment with imipenem and amikacin, and then imipenem alone. Citrobacter(More)
Thrombosis frequently accompanies inflammatory disease. There are numerous and frequent modifications of haemostasis parameters during inflammatory disease. Deficiencies in protein S, a protein C cofactor, are predisposing factors for thromboses. In 43 patients with biological inflammatory syndromes (ESR above 80 mm in the first hour found twice in a(More)
An enzymatic method using nitrocefin as substrate was developed to assay sulbactam in human serum. Serum containing sulbactam was incubated with purified titrated TEM-1 beta-lactamase and nitrocefin was then added to the mixture to determine the remaining beta-lactamase activity and consequently the concentration of sulbactam. Assays were carried out on(More)
We developed an enzymatic method using nitrocefin to assay tazobactam in vitro. Tazobactam was incubated with TEM-1 beta-lactamase. Then, residual beta-lactamase activity was assayed by adding nitrocefin. This activity corresponded indirectly to the initial concentration of tazobactam. Within-assay, between-assay and accuracy coefficients of variation were(More)
The in-vitro 50% inhibitory concentrations (IC50s) of latamoxef and imipenem against a set of plasmid-mediated beta-lactamases including TEM-1, TEM-3, TEM-5 and TEM-10 were determined by an enzymatic method using nitrocefin as substrate. The IC50s of both antibiotics against extended-spectrum beta-lactamases were below 0.2 mg/L. The conventional spectrum(More)
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