blaKPC and rmtB on a single plasmid in Enterobacter amnigenus and Klebsiella pneumoniae isolates from the same patient

Enterobacter amnigenus (EA76) and Klebsiella pneumoniae (KP76) isolates with multidrug-resistant (MDR) patterns were identified from the same patient in the neurosurgery department of our hospital. An outbreak of MDR K. pneumoniae had also occurred in this department. To characterize the resistance mechanism and molecular epidemiology of these isolates, sequential experiments including antimicrobial susceptibility testing, polymerase chain reaction (PCR), plasmid analysis, pulsed field gel electrophoresis (PFGE), and multilocus sequence typing (MLST) were performed. EA76 and KP76 were resistant to all of the antibiotics tested, except colistin and tigecycline. blaKPC-2, blaTEM-1, blaSHV-12, blaCTX-M-3, blaCTX-M-14, and rmtB genes were identified in both isolates, with blaKPC-2, blaTEM-1, blaCTX-M-14, and rmtB being co-carried on one plasmid in each isolate. Further analysis showed different restriction patterns between the two KPC-carrying plasmids. Of the 11 carbapenem-resistant isolates found in the outbreak, all were resistant to all of the β-lactams tested, with 63.64% (7/11) also exhibiting resistance to aminoglycosides and 72.73% (8/11) exhibiting resistance to quinolones. PCR analysis and molecular typing of the 11 K. pneumoniae strains revealed that the seven aminoglycoside-resistant isolates shared the same antibiotic-resistant gene pattern and identical or one-band-difference PFGE profiles relative to KP76. In addition, all of the eight aminoglycoside-resistant isolates, including KP76, belonged to the national epidemic clone ST11. The overall results indicate the emergence of E. amnigenus and outbreak of ST11 K. pneumoniae, with both co-harboring blaKPC and rmtB genes on a single plasmid in our neurosurgery wards

The Neglected Intrinsic Resistome of Bacterial Pathogens

Bacteria with intrinsic resistance to antibiotics are a worrisome health problem. It is widely believed that intrinsic antibiotic resistance of bacterial pathogens is mainly the consequence of cellular impermeability and activity of efflux pumps. However, the analysis of transposon-tagged Pseudomonas aeruginosa mutants presented in this article shows that this phenotype emerges from the action of numerous proteins from all functional categories. Mutations in some genes make P. aeruginosa more susceptible to antibiotics and thereby represent new targets. Mutations in other genes make P. aeruginosa more resistant and therefore define novel mechanisms for mutation-driven acquisition of antibiotic resistance, opening a new research field based in the prediction of resistance before it emerges in clinical environments. Antibiotics are not just weapons against bacterial competitors, but also natural signalling molecules. Our results demonstrate that antibiotic resistance genes are not merely protective shields and offer a more comprehensive view of the role of antibiotic resistance genes in the clinic and in nature

Stem cells and periodontal regeneration

Periodontitis is an inflammatory disease which manifests clinically as loss of supporting periodontal tissues including periodontal ligament and alveolar bone. For decades periodontists have sought ways to repair the damage which occurs during periodontitis. This has included the use of a range of surgical procedures, the use of a variety of grafting materials and growth factors, and the use of barrier membranes. To date periodontal regeneration is considered to be biologically possible but clinically unpredictable. Recently, reports have begun to emerge demonstrating that populations of adult stem cells reside in the periodontal ligament of humans and other animals. This opens the way for new cell-based therapies for periodontal regeneration. For this to become a reality a thorough understanding of adult human stem cells is needed. This review provides an overview of adult human stem cells and their potential use in periodontal regeneration.Lin N.H, Gronthos S and Bartold P.M

Telecare Provides comparable efficacy to conventional self-monitored blood glucose in patients with type 2 diabetes titrating one injection of insulin glulisine-the ELEONOR study.

BACKGROUND: We compared telecare and conventional self-monitored blood glucose (SMBG) programs for titrating the addition of one bolus injection of insulin glulisine in patients with type 2 diabetes uncontrolled on oral hypoglycemic agents for ≥3 months who were first titrated with basal insulin glargine. METHODS: This randomized, multicenter, parallel-group study included 241 patients (mean screening glycosylated hemoglobin [HbA(1c)], 8.8% [73 mmol/mol]). In the run-in phase, any antidiabetes medication, except for metformin, was discontinued. Metformin was then up-titrated to 2 g/day (1 g twice daily) until study completion. Following run-in, all patients started glargine for 8-16 weeks, targeting fasting plasma glucose (FPG) ≤5.6 mmol/L using conventional SMBG. Patients with FPG ≤7 mmol/L added a glulisine dose at the meal with the highest postprandial plasma glucose excursion, titrated to target 2-h postprandial plasma glucose level <7.8 mmol/L using telecare or SMBG for 24 weeks. Patients with FPG >7 mmol/L at week 16 were withdrawn from the study. RESULTS: After glargine titration, 224 patients achieved FPG ≤7 mmol/L, without any difference between telecare and SBMG groups (mean±SD, 6.2±0.8 vs. 6.0±0. 9 mmol/L, respectively). HbA(1c) levels were lower following titration and were similar for telecare and SMBG (7.9±0.9% vs. 7.8±0.9% [63 vs. 62 mmol/mol], respectively). Adding glulisine further reduced HbA(1c) in both groups (-0.7% vs. -0.7%); 45.2% and 54.8% (P=0.14), respectively, of patients achieved HbA(1c) ≤7.0% (≤53 mmol/mol). Weight change and hypoglycemia were similar between groups. CONCLUSIONS: Patients adding one dose of glulisine at the meal with the highest postprandial plasma glucose excursion to titrated basal glargine achieved comparable improvements in glycemic control irrespective of traditional or telecare blood glucose monitoring

Telecare Provides comparable efficacy to conventional self-monitored blood glucose in patients with type 2 diabetes titrating one injection of insulin glulisine-the ELEONOR study.

BACKGROUND: We compared telecare and conventional self-monitored blood glucose (SMBG) programs for titrating the addition of one bolus injection of insulin glulisine in patients with type 2 diabetes uncontrolled on oral hypoglycemic agents for ≥3 months who were first titrated with basal insulin glargine. METHODS: This randomized, multicenter, parallel-group study included 241 patients (mean screening glycosylated hemoglobin [HbA(1c)], 8.8% [73 mmol/mol]). In the run-in phase, any antidiabetes medication, except for metformin, was discontinued. Metformin was then up-titrated to 2 g/day (1 g twice daily) until study completion. Following run-in, all patients started glargine for 8-16 weeks, targeting fasting plasma glucose (FPG) ≤5.6 mmol/L using conventional SMBG. Patients with FPG ≤7 mmol/L added a glulisine dose at the meal with the highest postprandial plasma glucose excursion, titrated to target 2-h postprandial plasma glucose level <7.8 mmol/L using telecare or SMBG for 24 weeks. Patients with FPG >7 mmol/L at week 16 were withdrawn from the study. RESULTS: After glargine titration, 224 patients achieved FPG ≤7 mmol/L, without any difference between telecare and SBMG groups (mean±SD, 6.2±0.8 vs. 6.0±0. 9 mmol/L, respectively). HbA(1c) levels were lower following titration and were similar for telecare and SMBG (7.9±0.9% vs. 7.8±0.9% [63 vs. 62 mmol/mol], respectively). Adding glulisine further reduced HbA(1c) in both groups (-0.7% vs. -0.7%); 45.2% and 54.8% (P=0.14), respectively, of patients achieved HbA(1c) ≤7.0% (≤53 mmol/mol). Weight change and hypoglycemia were similar between groups. CONCLUSIONS: Patients adding one dose of glulisine at the meal with the highest postprandial plasma glucose excursion to titrated basal glargine achieved comparable improvements in glycemic control irrespective of traditional or telecare blood glucose monitoring