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https://www.readbyqxmd.com/read/28087318/etiologies-of-community-onset-urinary-tract%C3%A2-infections-requiring-hospitalization-and%C3%A2-antimicrobial-susceptibilities-of%C3%A2-causative-microorganisms
#1
Chih-Chien Chiu, Tzu-Chao Lin, Rui-Xin Wu, Ya-Sung Yang, Po-Jen Hsiao, Yi Lee, Jung-Chung Lin, Feng-Yee Chang
BACKGROUND: Community-onset urinary tract infections (CoUTIs) are the most common bacterial infections, and a decline in antibiotic susceptibility causes many clinical challenges. Adequate empiric antibiotic treatment can decrease unnecessary hospital stays and complications, while reducing the antimicrobial resistance progression. METHODS: From October 2014 to April 2015, we retrospectively enrolled patients who were at least 18 years old and required hospitalization for CoUTIs...
December 18, 2016: Journal of Microbiology, Immunology, and Infection, Wei Mian Yu Gan Ran za Zhi
https://www.readbyqxmd.com/read/28087171/a-propensity-score-matched-analysis-of-the-impact-of-minimum-inhibitory-concentration-on-mortality-in-patients-with-pseudomonas-aeruginosa-bacteremia-treated-with-cefepime-or-ceftazidime
#2
Angharad R Ratliff, Chris A Gentry, Riley J Williams
The United States Clinical and Laboratory Standards Institute recently elected not to revise ceftazidime and cefepime Pseudomonas aeruginosa minimum inhibitory concentration (MIC) susceptibility breakpoints but rather recommended specific dosage regimens to correspond to breakpoints. This study's objective was to examine mortality of low and high MIC P. aeruginosa isolates in bacteremic patients treated with cefepime or ceftazidime. Data were gathered through a Veterans Health Administration national administrative database for veterans with P...
January 3, 2017: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/28079262/pediatric-obesity-pharmacokinetic-alterations-and-effects-on-antimicrobial-dosing
#3
Stephanie Natale, John Bradley, William Huy Nguyen, Tri Tran, Pamela Ny, Kirsten La, Eva Vivian, Jennifer Le
BACKGROUND: Limited data exist for appropriate drug dosing in obese children. This comprehensive review summarizes pharmacokinetic alterations that occur with age and obesity, and these effects on antimicrobial dosing. A thorough comparison of different measures of body weight and specific antimicrobial agents, including cefazolin, cefepime, ceftazidime, daptomycin, doripenem, gentamicin, linezolid, meropenem, piperacill-tazobactam, tobramycin, vancomycin, and voriconazole, are presented...
January 12, 2017: Pharmacotherapy
https://www.readbyqxmd.com/read/28077047/extended-infusion-compared-to-standard-infusion-cefepime-as-empiric-treatment-of-febrile-neutropenia
#4
Rebekah H Wrenn, David Cluck, LeAnne Kennedy, Christopher Ohl, John C Williamson
Background Extended infusion (EI) dosing provides a longer time above the minimum inhibitory concentration, which is important for the clinical success of β-lactam antibiotics, especially for patients with impaired immunity. The aim of this study was to determine the feasibility and clinical impact of administering cefepime by EI as treatment of febrile neutropenia. Methods This was a prospective, randomized, comparative pilot study. All patients received cefepime 2 g IV every 8 h, with the first dose administered using a 30-min infusion...
January 1, 2017: Journal of Oncology Pharmacy Practice
https://www.readbyqxmd.com/read/28070116/aspergillus-terreus-brain-abscess-complicated-by-tension-pneumocephalus-in-a-patient-with-angiosarcoma
#5
Thejal Srikumar, Smitha Pabbathi, Jorge Fernandez, Sowmya Nanjappa
BACKGROUND Aspergillus terreus is an evolving opportunistic pathogen, and patients with A. terreus often have poor outcomes due to its intrinsic resistance to several systemic antifungal agents. Here we present a unique case of intracranial abscesses of A. terreus in a patient with recurrent angiosarcoma, complicated by development of tension pneumocephalus. CASE REPORT A 67-year old gentleman with history of scalp angiosarcoma with wide excision two years prior presented to the hospital for left arm clumsiness, altered mental status, and low-grade fever...
January 10, 2017: American Journal of Case Reports
https://www.readbyqxmd.com/read/28061852/the-occurrence-of-esbl-producing-escherichia-coli-carrying-aminoglycoside-resistance-genes-in-urinary-tract-infections-in-saudi-arabia
#6
Essam J Alyamani, Anamil M Khiyami, Rayan Y Booq, Majed A Majrashi, Fayez S Bahwerth, Elena Rechkina
BACKGROUND: The infection and prevalence of extended-spectrum β-lactamases (ESBLs) is a worldwide problem, and the presence of ESBLs varies between countries. In this study, we investigated the occurrence of plasmid-mediated ESBL/AmpC/carbapenemase/aminoglycoside resistance gene expression in Escherichia coli using phenotypic and genotypic techniques. METHODS: A total of 58 E. coli isolates were collected from hospitals in the city of Makkah and screened for the production of ESBL/AmpC/carbapenemase/aminoglycoside resistance genes...
January 6, 2017: Annals of Clinical Microbiology and Antimicrobials
https://www.readbyqxmd.com/read/28056274/-serotype-identification-and-antibiotic-susceptibility-of-shiga-toxin-producing-escherichia-coli-in-the-weishan-area-in-shandong-province-china
#7
C C Shao, B Hu, Z W Bi, Z Q Kou, M Fang, B L Chen, Z Q Bi
Objective: To determine the serotypes and drug resistance profiles of Shiga toxin-producing Escherichia coli (STEC) in animal stools from the Weishan area in Shandong Province, China. To provide the basis for further study. Methods: Five hundred animal stool samples (from pigs, cattle, sheep, dogs and birds) were collected from the Weishan area and STEC strains were isolated from these samples. Strains were serotyped by a serum agglutination test, and their drug resistance profiles were determined through antimicrobial sensitivity experiments...
January 6, 2017: Zhonghua Yu Fang Yi Xue za Zhi [Chinese Journal of Preventive Medicine]
https://www.readbyqxmd.com/read/28033162/an-ex-vivo-model-to-decipher-the-impact-of-extracorporeal-membrane-oxygenation-on-beta-lactam-degradation-kinetics
#8
Cyril Leven, Pierre Fillâtre, Antoine Petitcollin, Marie-Clémence Verdier, Jérôme Laurent, Nicolas Nesseler, Yoann Launey, Pierre Tattevin, Eric Bellissant, Erwan Flécher, Florian Lemaitre
BACKGROUND: As a consequence of drug sequestration, increase in volume of distribution or alteration of elimination, extracorporeal membrane oxygenation (ECMO) might lead to inadequate plasma concentrations of vital drugs. The aim of this experimental study was to develop an ex vivo model to better characterize the impact of ECMO procedure on beta-lactam antibiotics pharmacokinetics. METHODS: Plasma concentrations of cefotaxime, ceftazidime, cefepime, piperacillin, oxacillin, amoxicillin, and ceftriaxone were measured in an ex vivo ECMO circuit primed with whole human blood and compared to controls stored in glass tubes and polyvinyl chloride (PVC) tubing...
December 23, 2016: Therapeutic Drug Monitoring
https://www.readbyqxmd.com/read/28032422/analysis-of-the-third-and-fourth-generation-cephalosporin-use-for-the-treatment-of-infections-caused-by-gram-negative-bacteria-in-hospital-settings
#9
Dragana Protic, Aleksa Pejovic, Nina Djukanovic, Borislav Toskovic, Marija Zdravkovic, Zoran Todorovic
OBJECTIVE: The aims of our study were to assess the prevalence and distribution of Gram-negative (G-) bacteria in hospital isolates, their sensitivity to the third- and fourth-generation cephalosporins (c3 and c4), therapeutic use of c3 and c4 in the treatment of G- infections and drug utilisation data. RESEARCH DESIGN AND METHODS: This cross-sectional study collected medical records data from the General Hospital "Gornji Milanovac" (GM) and the University Medical Center "Bezanijska kosa" (BK)...
December 2016: International Journal of Clinical Practice
https://www.readbyqxmd.com/read/28031201/emergence-of-ceftazidime-avibactam-resistance-due-to-plasmid-borne-blakpc-3-mutations-during-treatment-of-carbapenem-resistant-klebsiella-pneumoniae-infections
#10
Ryan K Shields, Liang Chen, Shaoji Cheng, Kalyan D Chavda, Ellen G Press, Avin Snyder, Ruchi Pandey, Yohei Doi, Barry N Kreiswirth, M Hong Nguyen, Cornelius J Clancy
Ceftazidime-avibactam is a novel β-lactam/β-lactamase inhibitor with activity against carbapenem-resistant Enterobacteriaceae (CRE) that produce Klebsiella pneumoniae carbapenemase (KPC). We report the first cases of ceftazidime-avibactam resistance to develop during treatment of CRE infections, and identify resistance mechanisms. Ceftazidime-avibactam resistant K. pneumoniae emerged in three patients after ceftazidime-avibactam treatment for 10-19 days. Whole genome sequencing (WGS) of longitudinal ceftazidime-avibactam susceptible and resistant K...
December 28, 2016: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28007722/physical-compatibility-of-isavuconazonium-sulfate-with-select-i-v-drugs-during-simulated-y-site-administration
#11
Wonhee So, Liz Kim, Abrar K Thabit, David P Nicolau, Joseph L Kuti
PURPOSE: The physical compatibility of isavuconazonium sulfate with 95 i.v. drugs during simulated Y-site administration was studied. METHODS: Isavuconazonium sulfate for injection and all other drugs were reconstituted according to the manufacturer's recommendation and further diluted with 0.9% sodium chloride injection or 5% dextrose injection to a final concentration (1.5 mg/mL for isavuconazonium sulfate and standard concentrations used clinically for other drugs)...
January 1, 2017: American Journal of Health-system Pharmacy: AJHP
https://www.readbyqxmd.com/read/27999441/in-vitro-and-in-vivo-activities-of-the-diazabicyclooctane-op0595-against-ampc-derepressed-pseudomonas-aeruginosa
#12
Akihiro Morinaka, Yuko Tsutsumi, Keiko Yamada, Yoshihiro Takayama, Shiro Sakakibara, Toshihiko Takata, Takao Abe, Takeshi Furuuchi, Seiichi Inamura, Yoshiaki Sakamaki, Nakako Tsujii, Takashi Ida
Pseudomonas aeruginosa is a common cause for healthcare-associated infections, which have been historically treated by antipseudomonal β-lactam agents in the clinical setting. However, P. aeruginosa has evolved to overcome these β-lactam agents via multiple endogenous resistance mechanisms, including derepression of the chromosomal cephalosporinase (AmpC). In this article, we investigated the effective concentration of OP0595 for combination with piperacillin, cefepime or meropenem in in vitro susceptibility tests, and the antibacterial activity of cefepime in combination with OP0595 in both in vitro time-kill studies and in vivo murine thigh infection model study with AmpC-derepressed P...
December 21, 2016: Journal of Antibiotics
https://www.readbyqxmd.com/read/27986669/risk-of-acute-kidney-injury-in-patients-on-concomitant-vancomycin-and-piperacillin-tazobactam-compared-to-those-on-vancomycin-and-cefepime
#13
Bhagyashri Navalkele, Jason M Pogue, Shigehiko Karino, Bakht Nishan, Madiha Salim, Shantanu Solanki, Amina Pervaiz, Nader Tashtoush, Hamadullah Shaikh, Sunitha Koppula, Jonathan Koons, Tanveer Hussain, William Perry, Richard Evans, Emily T Martin, Ryan P Mynatt, Kyle P Murray, Michael J Rybak, Keith S Kaye
BACKGROUND: Recent evidence suggests that among patients receiving vancomycin, receipt of concomitant piperacillin-tazobactam increases the risk of nephrotoxicity. Well-controlled, adequately powered studies comparing rates of acute kidney injury (AKI) among patients receiving vancomycin + piperacillin-tazobactam (VPT) compared to similar patients receiving vancomycin + cefepime (VC) are lacking. In this study we compared the incidence of AKI among patients receiving combination therapy with VPT to a matched group receiving VC...
October 20, 2016: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/27983753/effectiveness-and-safety-of-tigecycline-compared-with-other-broad-spectrum-antimicrobials-in-abdominal-solid-organ-transplant-recipients-with-polymicrobial-intraabdominal-infections
#14
Tyler Liebenstein, Lucas T Schulz, Chris Viesselmann, Emma Bingen, Jackson Musuuza, Nasia Safdar, Warren E Rose
STUDY OBJECTIVE: As patients with abdominal solid organ transplants (SOT) are at increased risk of polymicrobial intraabdominal infections (IAIs) following transplantation, the objective of this study was to compare the effectiveness and adverse event profile of tigecycline with those of other broad-spectrum therapies for polymicrobial IAIs in this population. DESIGN: Retrospective cohort study. SETTING: Large academic medical center with multiple outpatient clinics...
December 16, 2016: Pharmacotherapy
https://www.readbyqxmd.com/read/27965653/esbl-producing-escherichia-coli-from-cows-suffering-mastitis-in-china-contain-clinical-class-1-integrons-with-ctx-m-linked-to-iscr1
#15
Tariq Ali, Sadeeq Ur Rahman, Limei Zhang, Muhammad Shahid, Shiyao Zhang, Gang Liu, Jian Gao, Bo Han
The prevalence of pathogenic multi-drug resistant (MDR) extended-spectrum β-lactamase (ESBL)-producing Escherichia coli is rapidly increasing, becoming a global concern. In a veterinary context, ESBL-producing E. coli are mostly reported in poultry and pigs. Here, we report on the prevalence and characterize ESBL-producing E. coli isolated from diverse dairy farms in China. Overall, 36 (23.53%) out of 153 E. coli isolates from mastitic milk samples (n = 1252) were confirmed as ESBL-producers by double-disc synergy testing and PCR...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27964935/molecular-and-in-silico-analysis-of-a-new-plasmid-mediated-ampc-%C3%AE-lactamase-cmh-2-in-clinical-isolates-of-klebsiella-pneumoniae
#16
Birson Ingti, Monjur Ahmed Laskar, Sudip Choudhury, Anand Prakash Maurya, Deepjyoti Paul, Anupam Das Talukdar, Manabendra Dutta Choudhury, Debadatta Dhar, Atanu Chakravarty, Amitabha Bhattacharjee
Two Klebsiella strains isolated from urine samples were positive for blaAmpC by PCR and showed sequence similarity with CMH-1 (98.6%) after sequencing. It also shares 82% similarity with ACT-1, 85% with MIR-1 and 81% with the chromosomal AmpC gene of Enterobacter cloacae. This gene was associated with the plasmid of IncK type. It has an open reading frame of 381 amino acid with four amino acid substitutions at position D144A, C189R, Q192E, and A195T as compared to CMH-1. When expressed in E.coli DH5α and E...
December 10, 2016: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/27956425/cephem-potentiation-by-inactivation-of-non-essential-genes-involved-in-cell-wall-biogenesis-of-%C3%AE-lactamase-producing-escherichia-coli
#17
Kristin R Baker, Helga Høeg Sigurðardóttir, Bimal Jana, Luca Guardabassi
Reversal of antimicrobial resistance is an appealing and largely unexplored strategy in drug discovery. The objective of this study was to identify potential targets for "helper" drugs reversing cephem resistance in Escherichia coli producing β-lactamases. A CMY-2-encoding plasmid was transferred by conjugation to seven isogenic deletion mutants exhibiting cephem hyper-susceptibility. The effect of each mutation was evaluated by comparing the MICs in the wild type and the mutant harboring the same plasmid...
December 12, 2016: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/27939093/susceptibility-to-cephalosporin-combinations-and-aztreonam-avibactam-among-third-generation-cephalosporin-resistant-enterobacteriaceae-recovered-on-hospital-admission
#18
Alexander Mischnik, Philipp Baumert, Axel Hamprecht, Anna Rohde, Silke Peter, Susanne Feihl, Johannes Knobloch, Hanna Gölz, Axel Kola, Birgit Obermann, Christiane Querbach, Matthias Willmann, Friedemann Gebhardt, Evelina Tacconelli, Petra Gastmeier, Harald Seifert, Winfried V Kern
As part of the multicentre Antibiotic Therapy Optimisation Study (ATHOS), minimum inhibitory concentrations (MICs) were determined for cephalosporins alone and in combination with the β-lactamase inhibitors tazobactam, clavulanic acid and avibactam against third-generation cephalosporin-resistant Escherichia coli, Klebsiella spp. and Enterobacter spp. isolates collected in German hospitals. MIC50/90 values were 0.25-4 mg/L for cefepime/tazobactam, 0.25-2 mg/L for ceftazidime/avibactam, 0.125-0.5 mg/L for ceftaroline/avibactam, 0...
November 28, 2016: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/27935927/molecular-identification-of-extended-spectrum-%C3%AE-lactamase-and-integron-genes-in-klebsiella-pneumonia
#19
E Estabraghi, T Z Salehi, K Amini, M Jamshidian
INTRODUCTION: Infections caused by Gram negative bacteria, producing extended-spectrum β-lactamase, including Klebsiella pneumoniae are increasing all over the world with high morbidity and mortality. The aim of the present study was determined antimicrobial profile susceptibility and the prevalence of antibiotic resistance genes by multiplex PCR. METHODS: In the present study, we obtained one-hundred isolates of K. pneumoniae from different clinical samples. The antibiotic susceptibility testing was done in thirteen antibiotic and, therefore, M-PCRs were conducted using the DNA amplification for detection of ESBLs (blaTEM, blaCTX-M, blaSHV) and int (I, II, III) genes...
April 2016: JNMA; Journal of the Nepal Medical Association
https://www.readbyqxmd.com/read/27924410/does-antibiotic-resistance-evolve-in-hospitals
#20
Anna Seigal, Portia Mira, Bernd Sturmfels, Miriam Barlow
Nosocomial outbreaks of bacteria are well documented. Based on these incidents, and the heavy usage of antibiotics in hospitals, it has been assumed that antibiotic resistance evolves in hospital environments. To test this assumption, we studied resistance phenotypes of bacteria collected from patient isolates at a community hospital over a 2.5-year period. A graphical model analysis shows no association between resistance and patient information other than time of arrival. This allows us to focus on time-course data...
December 6, 2016: Bulletin of Mathematical Biology
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