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Narges Mazloomi Nobandegani, Shima Mahmoudi, Babak Pourakbari, Reihaneh Hosseinpour Sadeghi, Mehri Najafi Sani, Fateme Farahmand, Farzaneh Motamed, Raheleh Nabavizadeh Rafsanjani, Setareh Mamishi
INTRODUCTION: Infection is a major cause of morbidity and mortality in patients with cystic fibrosis (CF). Antimicrobial resistance of the bacterial spp. particularly methicillin resistance in Staphylococcus aureus has caused a lot of attention. The aim of this study was to describe the prevalence of S. aureus, Pseudomonas aeruginosa and Burkholderia cepacia-complex as well as their antimicrobial susceptibility patterns in CF patients in an Iranian referral pediatrics Hospital. MATERIAL AND METHODS: From March 2011 until February 2012, 172 samples were collected at the Children Medical Center (CMC), an Iranian referral hospital in Tehran, Iran...
September 22, 2016: Microbial Pathogenesis
Cynthia M June, Taylor J Muckenthaler, Emma C Schroder, Zachary L Klamer, Zdzislaw Wawrzak, Rachel A Powers, Agnieszka Szarecka, David A Leonard
OXA-51 is a class D β-lactamase that is thought to be the native carbapenemase of Acinetobacter baumannii. Many variants of OXA-51 containing active site substitutions have been identified from A. baumannii isolates, and some of these substitutions increase hydrolytic activity toward carbapenem antibiotics. We have determined the high-resolution structures of apo OXA-51 and OXA-51 with one such substitution (I129L) with the carbapenem doripenem trapped in the active site as an acyl-intermediate. The structure shows that acyl-doripenem adopts an orientation very similar to carbapenem ligands observed in the active site of OXA-24/40 (doripenem) and OXA-23 (meropenem)...
September 16, 2016: Protein Science: a Publication of the Protein Society
Kazuko Ino, Kazunori Nakase, Kei Suzuki, Akiko Nakamura, Atsushi Fujieda, Naoyuki Katayama
Leuconostoc species are vancomycin-resistant Gram-positive cocci. Infections due to Leuconostoc species have been reported in various immunocompromised patients, but little is known about such infection in patients with hematologic malignancies. We report a case of Leuconostoc infection in a 44-year-old woman with acute lymphoblastic leukemia. The patient developed a high fever despite antimicrobial therapy with doripenem after induction chemotherapy. After an isolate from blood cultures was identified as L...
2016: Case Reports in Hematology
Gaku Yamamichi, Koichi Tsutahara, Sohei Kuribayashi, Masataka Kawamura, Kosuke Nakano, Nozomu Kishimoto, Go Tanigawa, Asako Matsushima, Satoshi Fujimi, Tetsuya Takao, Seiji Yamaguchi
A 40-year-old woman withuntreated type II diabetes mellitus was discovered withcardiopulmonary arrest in her room. On admission, she had ventricular fibrillation. After cardiopulmonary resuscitation, her own pulse restarted. The plasma glucose was 722 mg/dl and venous PH was 6.704. Abdominal computed tomography revealed gas within the parenchyma of the left kidney. We diagnosed her with emphysematous pyelonephritis and conducted emergency nephrectomy. Urinary and blood cultures were positive for Escherichia coli...
August 2016: Hinyokika Kiyo. Acta Urologica Japonica
Douglas J Biedenbach, Phan Trong Giao, Pham Hung Van, Nguyen Su Minh Tuyet, Tran Thi Thanh Nga, Doan Mai Phuong, Nguyen Vu Trung, Robert E Badal
PURPOSE: Multidrug-resistant bacterial pathogens are becoming a significant problem worldwide. Acinetobacter baumannii and Pseudomonas aeruginosa are problematic multidrug-resistant pathogens. This multicenter study in Vietnam determined the level of resistance to antimicrobial agents used to treat A baumannii and P aeruginosa infections in this country. METHODS: Five medical centers in Vietnam provided 529 P aeruginosa and 971 Acinetobacter species (904 A baumannii) isolates from patients with hospital-acquired or ventilator-associated pneumonia from 2012 to 2014...
September 2016: Clinical Therapeutics
Tatsuya Tada, Pham Hong Nhung, Tohru Miyoshi-Akiyama, Kayo Shimada, Mitsuhiro Tsuchiya, Doan Mai Phuong, Nguyen Quoc Anh, Norio Ohmagari, Teruo Kirikae
Forty clinical isolates of multidrug-resistant Pseudomonas aeruginosa were obtained in a medical setting in Hanoi, Vietnam. Whole genomes of all 40 isolates were sequenced by MiSeq (Illumina), and phylogenic trees were constructed from the single nucleotide polymorphism (SNP) concatemers. Of these 40 isolates, 24 (60.0%) harbored metallo-β-lactamase encoding genes, including blaIMP-15, blaIMP-26, blaIMP-51, and/or blaNDM-1 Of them, 12 isolates harbored blaIMP-26 and belonged to ST235. Escherichia coli expressing blaIMP-26 was significantly more resistant to doripenem and meropenem than E...
September 6, 2016: Antimicrobial Agents and Chemotherapy
Ilias Karaiskos, Maria Souli, Irene Galani, Helen Giamarellou
INTRODUCTION: Living in the 'era of antibiotic resistance' and facing the threat of an 'end to antibiotics', physicians in the last decade have revived use of colistin, since the available literature at the clinical level was poor and limited Areas covered: Herein, the authors present the current available knowledge regarding colistin, i.e. in vitro activity and interactions, current pharmacokinetics/pharmacodynamics (PK/PD), clinical efficacy against multidrug-resistant (MDR) and extensively drug-resistant (XDR) Gram-negative bacteria, as well as toxicity issues, whereas the recently published newer plasmid mediated mcr-1 resistance gene is reviewed and discussed...
August 30, 2016: Expert Opinion on Drug Metabolism & Toxicology
Cidália Pina-Vaz, Ana P Silva, Isabel Faria-Ramos, Rita Teixeira-Santos, Daniel Moura, Tatiana F Vieira, Sérgio F Sousa, Sofia Costa-de-Oliveira, Rafael Cantón, Acácio G Rodrigues
The synergy of carbapenem combinations regarding Enterobacteriaceae producing different types of carbapenemases was study through different approaches: flow cytometry and computational analysis. Ten well characterized Enterobacteriaceae (KPC, verona integron-encoded metallo-β-lactamases -VIM and OXA-48-like enzymes) were selected for the study. The cells were incubated with a combination of ertapenem with imipenem, meropenem, or doripenem and killing kinetic curves performed with and without reinforcements of the drugs...
2016: Frontiers in Microbiology
Yi-Fan Hu, Chang-Pan Liu, Nai-Yu Wang, Shou-Chuan Shih
BACKGROUND: Multidrug-resistant Pseudomonas aeruginosa has emerged as one of the most important healthcare-associated pathogens. Colistin is regarded as the last-resort antibiotic for multidrug-resistant Gram-negative bacteria, but is associated with high rates of acute kidney injury. The aim of this in vitro study is to search for an alternative treatment to colistin for multidrug-resistant P. aeruginosa infections. METHODS: Multidrug and carbapenem-resistant P...
2016: BMC Infectious Diseases
Saori Fukuda, Masaru Komatsu, Tatuya Nakamura, Takumi Jikimoto, Hisaaki Nishio, Katsutoshi Yamasaki, Kaori Satoh, Hirofumi Toda, Tamaki Orita, Noriyuki Sueyoshi, Machiko Kita, Isao Nishi, Masahiro Akagi, Takeshi Higuchi, Tomomi Kofuku, Isako Nakai, Tamotsu Ono, Kaneyuki Kida, Masanobu Ohama, Hideo Watari, Satoshi Shimura, Makoto Niki, Tomokazu Kuchibiro, Yasunao Wada
A study was conducted of the 1,225 Pseudomonas aeruginosa strains that were isolated at 20 medical institutions in the Kinki district between 2011 and 2013 to determine their antimicrobial susceptibility and to characterize the strains of multidrug-resistant Pseudomonas aeruginosa (MDRP) and the metallo-β-lactamase (MBL) -producing strains. The MIC50/MIC90 values (μg/mL) of the various antimicrobial agents were as follows: imipenem, 2/>8; meropenem, 1/>8; doripenem, 0.5/8; biapenem, 1/>8; tazobactam/piperacillin, 8/>64; piperacillin, 8/>64; sulbactam/cefoperazone, 8/64; cefepime, 4/16; cefozopran, 2/>16; aztreonam, 8/>16; amikacin, 4/16; levofloxacin, 1/>4; and ciprofloxacin, 0...
April 2016: Japanese Journal of Antibiotics
Pranita D Tamma, Yanjie Huang, Belita N A Opene, Patricia J Simner
Carbapenemase-producing (CP) Enterobacteriaceae are largely responsible for the rapid spread of carbapenem-resistant Enterobacteriaceae (CRE). Distinguishing CP-CRE from non-CP-CRE has important infection control implications. In a cohort of 198 CRE isolates, for isolates that remained susceptible or intermediate to some carbapenem antibiotics, an ertapenem MIC of 0.5 μg/ml and meropenem, imipenem, and doripenem MICs of 2 μg/ml were best able to distinguish CP-CRE from non-CP-CRE isolates.
October 2016: Antimicrobial Agents and Chemotherapy
Gauri G Rao, Neang S Ly, Jürgen B Bulitta, Rachel L Soon, Marie D San Roman, Patricia N Holden, Cornelia B Landersdorfer, Roger L Nation, Jian Li, Alan Forrest, Brian T Tsuji
OBJECTIVES: Polymyxin B is being increasingly utilized as a last resort against resistant Gram-negative bacteria. We examined the pharmacodynamics of novel dosing strategies for polymyxin B combinations to maximize efficacy and minimize the emergence of resistance and drug exposure against Acinetobacter baumannii. METHODS: The pharmacodynamics of polymyxin B together with doripenem were evaluated in time-kill experiments over 48 h against 10(8) cfu/mL of two polymyxin-heteroresistant A...
August 3, 2016: Journal of Antimicrobial Chemotherapy
Yongbo Zhang, Peizhen Li, Yuhan Yin, Fuqiang Li, Qinghua Zhang
No abstract text is available yet for this article.
July 27, 2016: Journal of Antibiotics
Ramalingam Sekar, Manoharan Mythreyee, Seetharaman Srivani, Murugesan Amudhan
The emergence and dissemination of antimicrobial resistance (AMR) is an important public health problem as resistant organisms cause difficult-to-treat infections. In this study, the prevalence of AMR in Escherichia coli and Klebsiella spp. in rural South India was examined in order to aid empirical therapy. A cross-sectional prospective study was conducted during the period from January 2012 to December 2014. Routine clinical isolates of E. coli and Klebsiella spp. were tested for antimicrobial susceptibility to β-lactams, aminoglycosides, fluoroquinolones, tetracyclines, colistin and nitrofurantoin by the Kirby-Bauer disk diffusion method and the data were documented and analyzed with one per patient analysis using WHONET software...
June 2016: Journal of Global Antimicrobial Resistance
Kei Yamamoto, Kayoko Hayakawa, Maki Nagamatsu, Yoshihiro Fujiya, Momoko Mawatari, Satoshi Kutsuna, Nozomi Takeshita, Saeko Tamura, Kazuhisa Mezaki, Norio Ohmagari
Arthrobacter species are gram-positive, aerobic, catalase-positive, coryneform bacteria belonging to the family Microbacteriaceae. An 87-year-old man with poorly controlled diabetic mellitus presented with fever, bedsores, and elevated hepatobiliary enzyme levels. He was diagnosed with bacteremia due to coryneform gram-positive bacilli with acute cholangitis. Doripenem and subsquencial sulbactum/ampicillin treatment were used for acute cholangitis, and the bacteremia was treated with 2 weeks of vancomycin treatment...
June 30, 2016: Japanese Journal of Infectious Diseases
Florian M Wagenlehner, Jack D Sobel, Paul Newell, Jon Armstrong, Xiangning Huang, Gregory G Stone, Katrina Yates, Leanne B Gasink
BACKGROUND: The global emergence of carbapenem-resistant Enterobacteriaceae highlights the urgent need to reduce carbapenem dependence. The phase 3 RECAPTURE program compared the efficacy and safety of ceftazidime-avibactam and doripenem in patients with complicated urinary tract infection (cUTI), including acute pyelonephritis. METHODS: Hospitalized adults with suspected or microbiologically confirmed cUTI/acute pyelonephritis were randomized 1:1 to ceftazidime-avibactam 2000 mg/500 mg every 8 hours or doripenem 500 mg every 8 hours (doses adjusted for renal function), with possible oral antibiotic switch after ≥5 days (total treatment duration up to 10 days or 14 days for patients with bacteremia)...
September 15, 2016: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
Seth Strawbridge, Michael D Nailor
BACKGROUND: High doses of β-lactam antibiotics have been advocated for acute pulmonary exacerbations caused by Pseudomonas aeruginosa in patients with cystic fibrosis (CF) secondary to high minimum inhibitory concentrations (MIC) of the infecting organisms. Some β-lactam antibiotics have increased elimination in CF patients. This case series examines the safety of high-dose doripenem (HDD), 2 g intravenously every 8 hours, which is 4 times the labeled dose, in CF patients. METHODS: This was a retrospective, single site, chart review of all CF patients given HDD during a 3-year period...
June 2016: Therapeutic Advances in Drug Safety
Manjula Mehta, Jyoti Sharma, Sonia Bhardwaj
Urinary tract infections (UTIs) are among the commonest types of bacterial infections. The antibiotic treatment for UTIs is associated with important medical and economic implications. Many different microorganisms can cause UTIs though the most common pathogens are E. coli and members of family Enterobacteriaceae. The knowledge of etiology and antibiotic resistance pattern of the organisms causing urinary tract infection is essential. The present study was undertaken to evaluate trends of antibiotic susceptibility of commonly isolated uropathogens using newer antimicrobial agents, prulifloxacin, fosfomycin (FOM) and doripenem...
March 15, 2016: Open Access Maced J Med Sci
Jared L Crandon, Charles-Edouard Luyt, Alexandra Aubry, Jean Chastre, David P Nicolau
OBJECTIVES: This study was designed to evaluate the pharmacodynamics of doripenem, imipenem and meropenem as a predictor of clinical success, mortality, 28 day recurrence and development of resistance in patients treated for Pseudomonas aeruginosa ventilator-associated pneumonia (VAP). PATIENTS AND METHODS: Previously published demographic and outcome data derived from patients treated for P. aeruginosa VAP with doripenem, imipenem or meropenem were utilized. Patient-specific data were used in conjunction with published population pharmacokinetic models to construct concentration-time profiles for each patient...
September 2016: Journal of Antimicrobial Chemotherapy
Kosuke Hirose, Hirohisa Okabe, Tomoharu Yoshizumi, Hideaki Uchiyama, Toru Ikegami, Norifumi Harimoto, Shinji Itoh, Koichi Kimura, Hideo Baba, Yoshihiko Maehara
A 62-year-old woman was admitted for acute epigastralgia and high-grade fever of over 39 °C. The patient had undergone splenectomy for idiopathic portal hypertension 1 year ago and vaccination against Streptococcus pneumoniae immediately post operation. She developed localized peritoneal irritation and abdominal distension. Her serum creatinine had increased to 1.5 mg/dL and procalcitonin was 12.5 ng/ml. Computed tomography of the abdomen revealed edematous large intestine and increased ascites. From these results, the patient was considered to have spontaneous bacterial peritonitis (SBP)...
December 2016: Surgical Case Reports
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