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https://www.readbyqxmd.com/read/28293865/the-inhibition-effect-of-lactobacilli-against-growth-and-biofilm-formation-of-pseudomonas-aeruginosa
#1
Dariush Shokri, Mohammad Rabbani Khorasgani, Milad Mohkam, Seyed Masih Fatemi, Younes Ghasemi, Asghar Taheri-Kafrani
The emergence of antibiotic-resistant and food-spoilage microorganisms has renewed efforts to identify safe and natural alternative agents of antibiotics such as probiotics. The aim of this study was the isolation of lactobacilli as potential probiotics from local dairy products with broad antibacterial and anti-biofilm activities against antibiotic-resistant strains of Pseudomonas aeruginosa and determination of their inhibition mechanism. Antibiotic susceptibility and classification of acquired resistance profiles of 80 P...
March 14, 2017: Probiotics and Antimicrobial Proteins
https://www.readbyqxmd.com/read/28293307/sensitivity-to-antimicrobial-drugs-of-pseudomonas-aeruginosa-extreme-resistant-strains-isolated-in-the-major-hospitals-of-central-kazakhstan
#2
Ilya S Azizov, Alyona V Lavrinenko, Ilya A Belyaev, Dmitry B Babenko, Natalya A Shambilova, Nelya M Bissenova
AIM: The article presents the current data on the sensitivity of the main 37 strains of eXtremaly Drugs Resistance (XDR) category to anti-pseudomonas drugs. MATERIAL AND METHODS: The strains were collected during the prospective multicenter study in large multidisciplinary hospitals of Central Kazakhstan. Susceptibility to antimicrobial drugs was carried out by disk method and the serial dilution method with the interpretation of the results according to EUCAST criteria...
March 15, 2017: Open Access Macedonian Journal of Medical Sciences
https://www.readbyqxmd.com/read/28291507/comparison-of-the-efficacies-of-three-empirically-selected-antibiotics-for-treating-acinetobacter-baumannii-pulmonary-infection-experience-from-a-teaching-hospital-in-china%C3%A2
#3
Ping Li, Xiaobo Wang, Weixia Wang, Xiaojing Zhao
OBJECTIVE: Infections due to multidrug- and extensively drug-resistant forms of Acinetobacter baumannii (MDR-AB and XDR-AB, respectively) have become increasingly prevalent. This retrospective study compared the outcomes of patients infected with MDR-AB or XDR-AB and treated with one of three antibiotics. METHODS: Enrolled were patients with MDR-AB or XDR-AB pulmonary infection based on their first sputum culture. Patients were treated empirically with carbapenems (n = 46), tigecycline (n = 25), or cefoperazone/sulbactam (cefina-SB; n = 35)...
March 14, 2017: International Journal of Clinical Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/28286833/ventilator-associated-pneumonia-and-its-responsible-germs-an-epidemiological-study
#4
Rama Bozorgmehr, Vanousheh Bahrani, Alireza Fatemi
INTRODUCTION: Ventilator-associated pneumonia (VAP) is one of the most common hospital infections and a side effect of lengthy stay in intensive care unit (ICU). Considering the ever-changing pattern of common pathogens in infectious diseases and the raise in prevalence of hospital infections, the present study was designed aiming to determine the prevalence of VAP and its bacterial causes. METHODS: In this cross-sectional study, the medical profiles of all the patients under mechanical ventilation, who had no symptoms of pneumonia at the time of intubation and developed new infiltration in chest radiography after 48 hours under mechanical ventilation along with at least 2 of the symptoms including fever, hypothermia, leukocytosis, leukopenia, or purulent discharge from the lungs, were evaluated...
2017: Emergency (Tehran, Iran)
https://www.readbyqxmd.com/read/28284077/multiplex-detection-of-extensively-drug-resistant-tuberculosis-using-binary-deoxyribozyme-sensors
#5
Hillary N Bengtson, Susanne Homolka, Stefan Niemann, Ana Júlia Reis, Pedro Eduardo da Silva, Yulia V Gerasimova, Dmitry M Kolpashchikov, Kyle H Rohde
Current diagnostic tools for Mycobacterium tuberculosis (Mtb) have many disadvantages including low sensitivity, slow turnaround times, or high cost. Accurate, easy to use, and inexpensive point of care molecular diagnostic tests are urgently needed for the analysis of multidrug resistant (MDR) and extensively drug resistant (XDR) Mtb strains that emerge globally as a public health threat. In this study, we established proof-of-concept for a novel diagnostic platform (TB-DzT) for Mtb detection and the identification of drug resistant mutants using binary deoxyribozyme sensors (BiDz)...
March 1, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28281912/naphthofuroquinone-derivatives-show-strong-antimycobacterial-activities-against-drug-resistant-mycobacteria
#6
Woong Sik Jang, Young-Sang Choi, Sukyung Kim, Md Anirban Jyoti, Hoonhee Seo, Juhye Han, Yong-Sik Kim, Jiwon Lyu, Kung-Woo Nam, Byung-Eui Lee, Kee-In Lee, Ho-Yeon Song
Tuberculosis, one of the world's major health problems, has become more serious due to the emergence of multi-drug resistant (MDR) and extensively drug-resistant (XDR) Mycobacterium tuberculosis (MTB). In this study, we performed three anti-MTB assays to evaluate the anti-mycobacterial activity of naphthofuroquinone derivatives against drug-resistant MTB. Among them, methyl 5-[2-(dimethylamino)ethoxy]-7,12-dioxo-7,12-dihydrodinaphtho[1,2-b:2',3'-d]furan-6-carboxylate (DFC2) exhibited strong anti-mycobacterial activity against MTB H37Ra, H37Rv and four drug-resistant MTB strains...
March 10, 2017: Journal of Chemotherapy
https://www.readbyqxmd.com/read/28279848/structure-activity-relationship-studies-on-3-5-dinitrophenyl-tetrazoles-as-antitubercular-agents
#7
Jan Němeček, Pavel Sychra, Miloslav Macháček, Markéta Benková, Galina Karabanovich, Klára Konečná, Věra Kavková, Jiřina Stolaříková, Alexandr Hrabálek, Kateřina Vávrová, Ondřej Soukup, Jaroslav Roh, Věra Klimešová
In this study, we described the structure-activity relationships of substituted 3,5-dinitrophenyl tetrazoles as potent antitubercular agents. These simple and readily accessible compounds possessed high in vitro antimycobacterial activities against Mycobacterium tuberculosis, including clinically isolated multidrug (MDR) and extensively drug-resistant (XDR) strains, with submicromolar minimum inhibitory concentrations (MICs). The most promising compounds showed low in vitro cytotoxicity and negligible antibacterial and antifungal activities, highlighting their highly selective antimycobacterial effects...
February 28, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28278765/antimycobacterial-docking-and-molecular-dynamic-studies-of-pentacyclic-triterpenes-from-buddleja-saligna-leaves
#8
Alveera Singh, Katharigatta N Venugopala, Mohammed A Khedr, Mellendran Pillay, Kenneth U Nwaeze, Yacoob Coovadia, Francis Shode, Bharti Odhav
Buddleja saligna (family Buddlejaceae) is a medicinal plant endemic to South Africa. Two isomeric pentacyclic triterpenes, oleanolic acid and ursolic acid, were isolated from the leaves of B. saligna using silica gel column chromatography. Compounds oleanolic acid and ursolic acid were subjected to derivatization with acetic anhydride in the presence of pyridine to obtain oleanolic acid-3-acetate and ursolic acid-3-acetate, respectively. The structures of these compounds were fully characterized by detailed nuclear magnetic resonance (NMR) investigations, which included (1)H and (13)C NMR...
September 22, 2016: Journal of Biomolecular Structure & Dynamics
https://www.readbyqxmd.com/read/28273983/primary-extrapulmonary-extensively-drug-resistant-tuberculosis-of-the-hip-in-an-immunocompetent-female-a-case-report
#9
Sankalp Yadav, Gautam Rawal
The problem of drug resistant Tuberculosis (TB) is looming large in the developing countries. TB of the skeletal system is rare and the primary extensively drug resistant TB (XDR-TB) of the hip joint has never been reported in the medical literature so far. The present case is a very rare case of primary XDR-TB of right hip joint in an immunocompetent Indian female. The present case is an important addition to the medical literature, as it will serve as a valuable source of information to the medical and surgical fraternity...
January 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28265350/cost-effectiveness-of-bedaquiline-in-mdr-and-xdr-tuberculosis-in-italy
#10
Luigi R Codecasa, Mondher Toumi, Anna D'Ausilio, Andrea Aiello, Francesco Damele, Roberta Termini, Alessia Uglietti, Robert Hettle, Giorgio Graziano, Saverio De Lorenzo
Objective: To evaluate the cost-effectiveness of bedaquiline plus background drug regimens (BR) for multidrug-resistant tuberculosis (MDR-TB) and extensively drug-resistant tuberculosis (XDR-TB) in Italy. Methods: A Markov model was adapted to the Italian setting to estimate the incremental cost-effectiveness ratio (ICER) of bedaquiline plus BR (BBR) versus BR in the treatment of MDR-TB and XDR-TB over 10 years, from both the National Health Service (NHS) and societal perspective. Cost-effectiveness was evaluated in terms of life-years gained (LYG)...
2017: Journal of Market Access & Health Policy
https://www.readbyqxmd.com/read/28264560/overcoming-an-extreme-drug-resistant-xdr-pathogen-avibactam-restores-susceptibility-to-ceftazidime-for-burkholderia-cepacia-complex-isolates-from-cystic-fibrosis-patients
#11
Krisztina M Papp-Wallace, Scott A Becka, Elise T Zeiser, Nozumi Ohuchi, Maria F Mojica, Julian A Gatta, Monica Falleni, Delfina Tosi, Elisa Borghi, Marisa L Winkler, Brigid M Wilson, John J LiPuma, Michiyoshi Nukaga, Robert A Bonomo
Burkholderia multivorans is a significant health threat to persons with cystic fibrosis (CF). Infections are difficult to treat as this pathogen is inherently resistant to multiple antibiotics. Susceptibility testing of isolates obtained from CF respiratory cultures revealed that single agents selected from different antibiotic classes were unable to inhibit growth. However, all isolates were found to be susceptible to ceftazidime when combined with the novel non-β-lactam β-lactamase inhibitor, avibactam (all minimum inhibitor concentrations (MICs) were ≤ 8 mg/L of ceftazidime and 4 mg/L of avibactam)...
March 6, 2017: ACS Infectious Diseases
https://www.readbyqxmd.com/read/28258235/antibiotic-non-antibiotic-combinations-for-combating-extremely-drug-resistant-gram-negative-superbugs
#12
REVIEW
Elena K Schneider, Felisa Reyes-Ortega, Tony Velkov, Jian Li
The emergence of antimicrobial resistance of Gram-negative pathogens has become a worldwide crisis. The status quo for combating resistance is to employ synergistic combinations of antibiotics. Faced with this fast-approaching post-antibiotic era, it is critical that we devise strategies to prolong and maximize the clinical efficacy of existing antibiotics. Unfortunately, reports of extremely drug-resistant (XDR) Gram-negative pathogens have become more common. Combining antibiotics such as polymyxin B or the broad-spectrum tetracycline and minocycline with various FDA-approved non-antibiotic drugs have emerged as a novel combination strategy against otherwise untreatable XDR pathogens...
February 28, 2017: Essays in Biochemistry
https://www.readbyqxmd.com/read/28253282/identification-of-extensive-drug-resistant-pseudomonas-aeruginosa-strains-new-clone-st1725-and-high-risk-clone-st233
#13
Pamela Aguilar-Rodea, Gerardo Zúñiga, Benjamín Antonio Rodríguez-Espino, Alma Lidia Olivares Cervantes, Ana Estela Gamiño Arroyo, Sarbelio Moreno-Espinosa, Daniela de la Rosa Zamboni, Briceida López Martínez, María Del Carmen Castellanos-Cruz, Israel Parra-Ortega, Verónica Leticia Jiménez Rojas, Juan Carlos Vigueras Galindo, Norma Velázquez-Guadarrama
Several microorganisms produce nosocomial infections (NIs), among which Pseudomonas aeruginosa stands out as an opportunist pathogen with the capacity to develop multiresistance to first-choice antibiotics. From 2007 to 2013, forty-six NIs produced by P. aeruginosa were detected at a pediatric tertiary care hospital in Mexico with a significant mortality rate (17.39%). All isolates (n = 58/46 patients) were characterized by evaluating their response to several antibiotics as panresistant (PDR), extensively resistant (XDR), multiresistant (MDR) or sensitive (S)...
2017: PloS One
https://www.readbyqxmd.com/read/28240569/selected-questions-and-controversies-about-bedaquiline-a-view-from-the-field
#14
K Dheda, A Esmail, J Limberis, G Maartens
Although there has been a slow decline in tuberculosis (TB) incidence worldwide, the prevalence of drug-resistant TB in most high-burden countries has increased. Drug-resistant TB is associated with high mortality, is a threat to health care workers in TB-endemic countries and is prohibitively costly, which diverts resources away from drug-susceptible cases. Amplification of resistance means that there is an increasing proportion of patients with multidrug-resistant TB who have extensively drug-resistant TB (XDR-TB) or are programmatically untreatable...
December 1, 2016: International Journal of Tuberculosis and Lung Disease
https://www.readbyqxmd.com/read/28238067/acquisition-of-tn6018-3-cs-regions-increases-colistin-mics-against-acinetobacter-baumannii-isolates-harboring-new-variants-of-abars
#15
Mohammad Savari, Alireza Ekrami, Saeed Shoja, Abbas Bahador
Colistin is the last hope to treat extensively drug resistance (XDR) Acinetobacter baumannii (A. baumannii) infections, but resistance to colistin is currently reported in clinical centers all over the world. Here, we studied two colistin-resistant A. baumannii isolates with a difference in minimum inhibitory concentrations (MICs) that were isolated from a single burn patient during treatment in the hospitalization period. The international clonal (IC) lineage, multilocus sequence typing (MLST), and multiple loci variable number tandem repeat (VNTR) analysis (MLVA) typing were used to characterize the relatedness of A...
February 25, 2017: Folia Microbiologica
https://www.readbyqxmd.com/read/28237694/analysis-of-clinical-and-microbiological-data-on-acinetobacter-baumannii-strains-assist-the-preauthorization-of-antibiotics-at-the-patient-level-for-an-effective-antibiotic-stewardship-program
#16
Khine Swe Swe-Han, Koleka P Mlisana, Manormoney Pillay
Drug resistant Acinetobacter baumannii (A. baumannii) poses serious treatment challenges and is on the rise worldwide. The Infectious Diseases Society of America/Society for Healthcare Epidemiology of America recommends preauthorization of antibiotics to ensure successful antibiotic stewardship programs (ASWPs). This study estimates and analyzes the microbiological and clinical characteristics of A. baumanii strains with differentiating criteria for sepsis versus colonization, in order to support preauthorization and assist ASWPs at the patient level...
February 22, 2017: Journal of Infection and Public Health
https://www.readbyqxmd.com/read/28225341/patterns-of-drug-resistance-among-patients-with-tuberculous-pleural-effusion-in-greece
#17
V Anastasakos, V Skouras, C Moschos, S Tsikrika, S Karabela, I Marinou, E Vogiatzakis, K Konstantinou, A Papavasiliou, I Kalomenidis
SETTING: Data on the relationship between pleural tuberculosis (TB) and anti-tuberculosis drug resistance are scarce. OBJECTIVE: To determine the patterns of drug resistance among pleural Mycobacterium tuberculosis isolates in Greece and the incidence of tuberculous pleural effusion (TPE) among patients with multidrug-resistant (MDR) or extensively drug-resistant (XDR) pulmonary TB. DESIGN: Drug susceptibility testing (DST) results recorded in the database of the National Reference Centre for Tuberculosis in Athens, Greece, over a 9-year period (2003-2011) were reviewed...
March 1, 2017: International Journal of Tuberculosis and Lung Disease
https://www.readbyqxmd.com/read/28222788/antimicrobial-resistance-and-genomic-rep-pcr-fingerprints-of-pseudomonas-aeruginosa-strains-from-animals-on-the-background-of-the-global-population-structure
#18
Isa Serrano, Manuela Oliveira, José Pedro Santos, Florence Bilocq, Alexandre Leitão, Luis Tavares, Jean-Paul Pirnay, Daniel De Vos
BACKGROUND: Pseudomonas aeruginosa is an important human opportunistic pathogen responsible for fatal nosocomial infections worldwide, and has emerged as a relevant animal pathogen. Treatment options are dramatically decreasing, due to antimicrobial resistance and the microorganism's large versatile genome. Antimicrobial resistance profiles, serotype frequency and genomic profile of unrelated P. aeruginosa isolates of veterinary origin (n = 73), including domesticated, farm, zoo and wild animals mainly from Portugal were studied...
February 21, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/28214557/quadruple-first-line-drug-resistance-in-mycobacterium-tuberculosis-in-vietnam-what-can-we-learn-from-genes
#19
Huy Quang Nguyen, Nhung Viet Nguyen, Lucie Contamin, Thanh Hoa Thi Tran, Thuong Thi Vu, Hung Van Nguyen, Ngoc Lan Thi Nguyen, Son Thai Nguyen, Anh Duc Dang, Anne-Laure Bañuls, Van Anh Thi Nguyen
In Vietnam, a country with high tuberculosis (137/100.000 population) and multidrug-resistant (MDR)-TB burdens (7.8/100.000 population), little is known about the molecular signatures of drug resistance in general and more particularly of second line drug (SLD) resistance. This study is specifically focused on Mycobacterium tuberculosis isolates resistant to four first-line drugs (FLDs) that make TB much more difficult to treat. The aim is to determine the proportion of SLD resistance in these quadruple drug resistant isolates and the genetic determinants linked to drug resistance to better understand the genetic processes leading to quadruple and extremely drug resistance (XDR)...
February 21, 2017: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/28213015/lettuce-and-fruits-as-a-source-of-multidrug-resistant-acinetobacter-spp
#20
Ana Carvalheira, Joana Silva, Paula Teixeira
The role of ready-to-eat products as a reservoir of pathogenic species of Acinetobacter remains unclear. The objective of the present study was to evaluate the presence of Acinetobacter species in lettuces and fruits marketed in Portugal, and their susceptibility to antimicrobials. Acinetobacter spp. were isolated from 77.9% of the samples and these microorganisms were also found as endophytes (i.e. present within the plant tissue) in 12 of 20 samples of lettuces analysed. Among 253 isolates that were identified as belonging to this genus, 181 presented different PFGE profiles, representing different strains...
June 2017: Food Microbiology
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