PubMed · 9224070
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S L Gorbach. 1997-06-21. Treating diarrhoea.. https://doi.org/10.1136/bmj.314.7097.1776
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The advantages of using capillary electrophoresis (CE) over other methodologies for determining pK(a) values of drugs in hydroorganic media are discussed. The focus of the discussion based upon the pK(a) values of a series of quinolones determined in acetonitrile (MeCN)--water mixtures by CE, liquid chromatography, potentiometric, and spectrophotometric methods.
The VITEK2 system was evaluated with 138 fresh consecutive routine clinical Enterobacteriaceae isolates. Susceptibility results to 10 beta-lactams, three aminoglycosides and a quinolone were compared with those obtained following the NCCLS standard microdilution. API20E was used as reference method for identification. All but three isolates were correctly identified in 3 h at species level (97.8%), two isolates (1.4%) at genus level and only one isolate was misidentified. Overall essential agreement for susceptibility testing was 97.1%. Discrepancies were mainly observed with piperacillin (1.1%), cefuroxime (0.6%) and amoxycillin/clavulanate (0.3%). Discrepancies for aminoglycosides and ciprofloxacin were low (<0.1%). Minor, major and very major errors (NCCLS categories) were 4.1%, 0.2% and 6.1%, respectively. Very major errors were due to piperacillin (4.5%), ampicillin (0.8%) and amoxycillin/clavulanate (0.8%). The VITEK2 system gave accurate identification and susceptibility testing results of routine Enterobacteriaceae clinical isolates.
Drugs induce a variety of pulmonary diseases including pulmonary infiltration with eosinophilia (PIE) syndrome. We report a case of PIE syndrome which was observed after neck dissection. An 83-year-old male patient attended our clinic complaining of upper neck swelling and was diagnosed as advanced lymph node metastasis related to previously resected oral carcinoma and underwent neck dissection. Despite administration of antibiotics (piperacillin sodium, PIPC; and tosufloxacin tosilate, TFLX), fever and an elevation of the c-reactive protein (CRP) level with neutrophilia appeared, and an infiltration shadow was observed in the right lower pulmonary field. With the suspicion of pneumonia, the antibiotics were exchanged for panipenem/betamipron. However, the pulmonary infiltration spread widely, CRP increased to 12.9 mg/dl and severe eosinophilia (23%) was observed a few days after changing the antibiotics. PIE syndrome was suspected, and the patient underwent steroid mini-pulse therapy consisting of methylprednisolone sodium succinate (500 mg) and prednisolone (60 mg). After steroid therapy, the pulmonary condition largely improved. However, about 2 weeks after the start of steroid administration, a fever and a further elevation of CRP were observed with an increase of beta-D-glucan in serum. Roentgenography revealed diffuse infiltration shadows throughout the lungs, and the patient died about 3 weeks after the onset from respiratory distress. In vitro, blastogenesis of patient's peripheral blood lymphocytes was strongly enhanced by PIPC and TFLX, and they generated a large amount of interleukin-5 in the presence of PIPC or TFLX. The clinical course and laboratory examination results revealed that PIE syndrome may have been induced by PIPC and TFLX and that PIE syndrome should be suspected in treatment of carcinomas when dyspnea and pulmonary infiltration are complicated with eosinophilia.