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D Buiuc

Publications and source records attributed to D Buiuc.

62 records · Page 4Linked to original sources
PubMedDate not supplied

Detection of beta-lactamase production and enzyme profiles in Enterobacteriaceae isolated in Moldova.

In our study, out of 449 Enterobacteriaceae strains isolated between 1985 and 1990, 16 strains (3 Proteus, 6 nontyphoidal Salmonella, 7 Escherichia coli) were resistant both to Ampicillin- Sulbactam and Amoxycillin-Clavulanic acid associations. The activity profiles of the beta-lactamases produced by these resistant strains are described. Sarcina lutea ATCC 9341 was used as test strain. The effect of the enzymatic filtrate against beta-lactam antibiotics: Ampicillin, Cloxacillin, Cefadroxil, Cefuroxime, Cefotaxime, Ceftriaxone, was followed up. The enzyme types were established according to the ability of inactivating the tested antibiotics. Penicillins and cephalosporins were inactivated by these enzymes, except for Carbenicillin and Oxacillin. These beta-lactamases were resistant to Sulbactam and Clavulanic acid. In the studied Salmonella strains they are plasmidic codified, demonstrating that they belong to a new beta-lactamase class.

Anti-Bacterial Agents↗
PubMedDate not supplied

[Enterobacteriaceae isolated in eastern Romania: the evolution of ampicillin sensitivity in the 1970-1995 period].

The activity of ampicillin against 3383 Enterobacteriaceae (community and clinical isolates), collected in Eastern Romania, during 25 years was tested. Data were prelucrated by the box-plot method proposed by Simpson and Donnelly. The resistance degree for all species tested has progressively increased. In the studied region Enterobacteriaceae strains maintain their natural sensitivity only exceptionally: e.g., S. typhi and S. java, with limited circulation. Enterobacteriaceae which have contact with the resistance genic reservoir of the colon microbiota during the justified or nonjustified antibiotic treatment development resistance to usual antibiotics in the same ratio as most existent commensals present in this habitat.

Ampicillin↗
PubMedDate not supplied

Development of resistance in Shigella flexneri isolates obtained in the past 20 years in eastern Romania.

Our study is focused on the antimicrobial activity for a number of 626 Shigella flexneri strains collected from epidemic outbreaks and hospitalised patients during 1976-1995 period, in Eastern Romania. The metodology used for determining the in vitro activity of the antimicrobials was that described by NCCLS. The agents which are currently used in therapy (ampicillin, tetracycline, chloramphenicol) are less active than the newer drugs (third generation cephalosporins, aztreonam, imipenem, ciprofloxacin) for which sensitivity ranged between 93-100% The associated resistance between ampicillin, tetracycline, chloramphenicol was demonstrated. Isolates with MIC values for ampicillin > 8 micrograms/ml are still sensitive to the modern beta-lactams. For ampicillin/sulbactam association, sensitivity decreases from 100% in 1990-1993 to 43% in 1994-1995.

Cross Infection↗
PubMedDate not supplied

[The value of C-reactive protein for the differentiation of bacterial meningitis from viral meningitis].

In order to differentiate bacterial meningitis versus viral meningitis, we have comparatively tested the efficacy of the following tests: C-reactive protein (CRP), erythrocytes sedimentation rate (ESR), fever, level of glucose in cerebro-spinal fluid (CSF), glucose in CSF/glycemia ratio, number of white blood cells in peripheric blood, percentage of neutrophils in peripheric blood, level of proteins in CSF and number of nucleated cells in CSF for a group of 49 patients, both children and adults with central nervous system infection (37 patients with bacterial meningitis and 12 with viral meningitis) hospitalised between May 1993 and July 1994 in Clinical Hospital for Infectious Diseases in Iaşi. The mean value of CRP in bacterial meningitis patients was 8.78 mg%, contrasting with the mean value of CRP = 1.92 mg% recorded in patients with viral meningitis. Ten out of 37 bacterial meningitis patients presented a CRP concentration < 1.85 mg%. All these 10 patients have already had an antibiotic treatment at the moment of the assay. One out of 12 cases of viral meningitis had a value of CRP = 3.3 mg%, all the remainder cases having values under 1.85 mg%. We recorded highly significant differences between the two patient groups for CRP (p < 0.001), ESR (p < 0.01), protein concentration in CSF (p < 0.001) and number of nucleated cells in CSF (p < 0.001). Differences recorded for fever, concentration of glucose in CSF, glucose in CSF/glycemia ratio, number of leucocytes in peripheric blood and percentage of neutrophils in peripheric blood, were not significant (p > 0.5). Data were analysed also by box-plot method which facilitates the visual appraisal of the differences recorded between the two aetiological groups. In conclusion, assays of CRP and ESR may be used as differentiation tests for bacterial meningitis versus viral meningitis, when assay is done before the antibiotic treatment, being sufficient sensitive, and easy to perform.

Adolescent↗