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Minimum inhibitory concentration

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https://www.readbyqxmd.com/read/28319414/preparation-and-characterization-of-zno-nanoparticles-coated-by-chitosan-linoleic-acid-fungal-growth-and-biofilm-assay
#1
S Barad, M Roudbary, A Nasrollahi Omran, M Porgham Daryasari
INTRODUCTION: This study has been carried out on reviewing the use of new synthetic component of zinc oxide nanoparticles (ZnO NPs) coated by Chitosan-linoleic acid (CS-LA) and to assess Minimum inhibitory concentration (MIC) of nanoparticles on clinical samples and biofilm formation in vitro. MATERIALS AND METHODS: At first the synthesized ZnO NPs coated by CS-LA were identified with X-ray powder diffraction (XRD), Scanning electron microscope (SEM), Transmission electron microscope (TEM) and Fourier Transform Infrared Spectroscopy analysis (FTIR)...
2017: Bratislavské Lekárske Listy
https://www.readbyqxmd.com/read/28317814/the-medicinal-plants-in-the-control-of-tuberculosis-laboratory-study-on-medicinal-plants-from-the-northern-area-of-pakistan
#2
Sami Ullah, Shah Hussain, Sadiq Noor Khan, Mohammad Khurram, Iqbal Khan, Murad Ali Khan
BACKGROUND: Tuberculosis (TB) ranks as the second leading cause of deaths due to infectious diseases. Although global efforts have been made to control TB, still, this is a serious threat as Mycobacterium tuberculosis (MTB) produced resistance against both the first- and second-line drugs. The increasing incidence of multidrug-resistant, extremely drug resistant, and totally drug-resistant TB worldwide requires extra efforts to search for new anti-TB drugs. MATERIALS AND METHODS: The present study evaluated the antimycobacterial activities of Citrullus colocynthis, Calotropis procera, Ricinus communis, Capparis decidua, and Fagonia cretica plants' extracts against rifampicin-sensitive (H37Rv) and rifampicin-resistant (TMC331) strains of MTB...
January 2017: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28317803/an-unusual-antibiotic-susceptibility-pattern-in-a-mycobacterium-cosmeticum-strain-isolated-from-the-chesapeake-bay
#3
Vajini Atukorale, Nicholas Boire, Kim Dionne, Stefan Riedel, Nicole Parrish
OBJECTIVE/BACKGROUND: Mycobacterium cosmeticum, first described in 2004, was recovered from a patient undergoing a cosmetic procedure. Subsequently, this species was associated with an outbreak in a nail salon. In all cases, the isolates were susceptible to all antibiotics tested. Recently, however, we recovered a strain of M. cosmeticum from the Chesapeake Bay, resistant to 11 of 14 antimicrobials. The objective of this work was to present our findings on the resistance and susceptibility of this isolate to various antibiotics...
January 2017: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28317676/effect-of-the-administration-period-of-perioperative-topical-levofloxacin-on-normal-conjunctival-bacterial-flora
#4
Ryohei Nejima, Kimiya Shimizu, Takashi Ono, Yukari Noguchi, Akiko Yagi, Takuya Iwasaki, Nobuyuki Shoji, Kazunori Miyata
PURPOSE: To assess the long-term and short-term effects of post-cataract surgery antibiotic therapy on the drug-resistance profile of normal conjunctival bacterial flora. SETTING: Miyata Eye Hospital, Miyazaki, Japan. DESIGN: Randomized prospective clinical trial. METHODS: Patients aged 20 years or older who had cataract surgery between May and September 2015 were given levofloxacin 1.5% ophthalmic solution for 3 days preoperatively...
January 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/28317126/pharmacokinetics-of-ceftiofur-sodium-in-equine-pregnancy
#5
M L Macpherson, S Giguère, M A Pozor, E Runcan, T W Vickroy, S A Benson, M H T Troedsson, J N Hatzel, J Larson, E Vanden Berg, A A Kelleman, L C Sanchez, M M LeBlanc
Eleven pregnant pony mares (D270-326) were administered ceftiofur sodium intramuscularly at 2.2 mg/kg (n = 6) or 4.4 mg/kg (n = 5), once daily. Plasma was obtained prior to ceftiofur administration and at 0.5, 1, 2, 4, 8, 12, and 24 hr after administration. Eight pony mares were re-enrolled in the study at least 3 days from expected foaling to ensure steady-state concentrations of drug at the time of foaling. Mares were administered ceftiofur sodium (4.4 mg/kg, IM) daily until foaling. Parturition was induced using oxytocin 1 hr after ceftiofur sodium administration...
March 19, 2017: Journal of Veterinary Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/28315730/synthesis-antimicrobial-activity-and-toxicity-to-nematodes-of-cyclam-derivatives
#6
Luis G Alves, Pedro F Pinheiro, Joana R Feliciano, Diana P Dâmaso, Jorge H Leitão, Ana M Martins
The antimicrobial activity and toxicity to nematodes of the cyclam salt [H2{H2((4-CF)3PhCH2)2Cyclam}](CH3COO)2.(CH3COOH)2 was evaluated. Estimated minimum inhibitory concentrations (MICs) of 9, 261 and 15 µg/mL were obtained for Escherichia coli, Pseudomonas aeruginosa and Staphylococcus aureus, respectively. For selected Candida spp., the estimated MICs obtained ranged from 32 µg/mL to 63 µg/mL. Bactericidal activity was demonstrated but the compound was not reliably fungicidal. Concentrations of the cyclam salt up to 32 µg/mL did not significantly affect survival of the nematode Caenorhabditis elegans; however, concentrations equal or above this value significantly affected nematode survival in a dose-dependent manner...
March 15, 2017: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/28315729/pharmacodynamics-of-tigecycline-alone-and-in-combination-with-colistin-against-clinical-isolates-of-multidrug-resistant-acinetobacter-baumannii-in-an-in-vitro-pharmacodynamic-model
#7
Xuejiu Cai, Zhen Yang, Jianqiang Dai, Kun Chen, Huiliang Liu, Wentao Ni, Chuanqi Wei, Junchang Cui
The objectives of this study, which were based on the hypothesis of mutant prevention concentration (MPC), were to compare tigecycline and colistin monotherapy and combination therapy against multidrug-resistant Acinetobacter baumannii (MDR-AB) and to identify changes in the susceptibility of the organism using an in vitro pharmacodynamic model. Human free-drug concentration profiles of colistin and tigecycline used alone and in combination were simulated against four clinical MDR-AB isolates over 24 h. Pharmacodynamic activity was measured as log10 CFU/mL and as the area under the bactericidal curve (AUBC)...
March 16, 2017: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/28304328/bactericidal-effect-of-pterostilbene-alone-and-in-combination-with-gentamicin-against-human-pathogenic-bacteria
#8
Wee Xian Lee, Dayang Fredalina Basri, Ahmad Rohi Ghazali
The antibacterial activity of pterostilbene in combination with gentamicin against six strains of Gram-positive and Gram-negative bacteria were investigated. The minimum inhibitory concentration and minimum bactericidal concentration of pterostilbene were determined using microdilution technique whereas the synergistic antibacterial activities of pterostilbene in combination with gentamicin were assessed using checkerboard assay and time-kill kinetic study. Results of the present study showed that the combination effects of pterostilbene with gentamicin were synergistic (FIC index < 0...
March 17, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28303847/trends-in-drug-resistance-of-acinetobacter-baumannii-over-a-10-year-period-nationwide-data-from-the-china-surveillance-of-antimicrobial-resistance-program
#9
Lei Gao, Yuan Lyu, Yun Li
BACKGROUND: Acinetobacter baumannii has emerged as an important pathogen causing a variety of infections. Using data from the China Surveillance of Antimicrobial Resistance Program conducted biennially, we investigated the secular changes in the resistance of 2917 isolates of A. baumannii from 2004 to 2014 to differ antimicrobial agents. METHODS: Pathogen samples were collected from 17 to 20 hospitals located in the eastern, central, and western regions of China...
March 20, 2017: Chinese Medical Journal
https://www.readbyqxmd.com/read/28303836/carbapenem-nonsusceptibility-with-modified-oprd-in-clinical-isolates-of-pseudomonas-aeruginosa-from-india
#10
Debarati Choudhury, Anupam Das Talukdar, Manabendra Dutta Choudhury, Anand Prakash Maurya, Debadatta Dhar Chanda, Atanu Chakravorty, Amitabha Bhattacharjee
This study was undertaken to investigate OprD porin-mediated carbapenem nonsusceptibility in clinical isolates of Pseudomonas aeruginosa from a tertiary referral hospital of Northeast India. A total of 267 nonduplicate, consecutive clinical isolates of P. aeruginosa were obtained. Mutation and expression levels of OprD gene were determined in carbapenem-nonsusceptible carbapenemase-nonproducing isolates. Among 19 carbapenem-nonsusceptible carbapenemase-nonproducing isolates, 11 of them demonstrated variable band pattern while performing denaturing gradient gel electrophoresis with amplified products of OprD gene...
January 2017: Indian Journal of Medical Microbiology
https://www.readbyqxmd.com/read/28303826/prevalence-of-pneumococcal-serotypes-in-adults-%C3%A2-50-years-of-age
#11
Chand Wattal, Neeraj Goel, S P Byotra
CONTEXT: Currently, majority of studies on antibiotic resistance and serotype prevalence in Streptococcus pneumoniae are in paediatric population and there is limited epidemiologic data pertaining to elderly Indian population. AIMS: This study was undertaken to assess antibiotic resistance pattern and the coverage of the polysaccharide vaccine 23 (PPV23) in the elderly population. SETTINGS AND DESIGN: This was a prospective 2-year pneumococcal surveillance study in patients with community-acquired pneumococcal infections of ≥50 years' age group on fifty isolates of S...
January 2017: Indian Journal of Medical Microbiology
https://www.readbyqxmd.com/read/28303819/prevalence-and-genetic-mechanisms-of-antimicrobial-resistance-in-staphylococcus-species-a-multicentre-report-of-the-indian-council-of-medical-research-antimicrobial-resistance-surveillance-network
#12
Sunanda Rajkumar, Sujatha Sistla, Meerabai Manoharan, Madhan Sugumar, Niveditha Nagasundaram, Subhash Chandra Parija, Pallab Ray, Yamuna Devi Bakthavatchalam, Balaji Veeraraghavan, Arti Kapil, Kamini Walia, V C Ohri
PURPOSE: Routine surveillance of antimicrobial resistance (AMR) is an essential component of measures aimed to tackle the growing threat of resistant microbes in public health. This study presents a 1-year multicentre report on AMR in Staphylococcus species as part of Indian Council of Medical Research-AMR surveillance network. MATERIALS AND METHODS: Staphylococcus species was routinely collected in the nodal and regional centres of the network and antimicrobial susceptibility testing was performed against a panel of antimicrobials...
January 2017: Indian Journal of Medical Microbiology
https://www.readbyqxmd.com/read/28303540/exploiting-fruit-byproducts-for-eco-friendly-nanosynthesis-citrus%C3%A2-%C3%A3-%C3%A2-clementina-peel-extract-mediated-fabrication-of-silver-nanoparticles-with-high-efficacy-against-microbial-pathogens-and-rat-glial-tumor-c6-cells
#13
Rijuta Ganesh Saratale, Han-Seung Shin, Gopalakrishnan Kumar, Giovanni Benelli, Gajanan S Ghodake, Yuan Yuan Jiang, Dong Su Kim, Ganesh Dattatraya Saratale
Process byproducts from the fruit industry may represent a cheap and reliable source of green reducing agents to be used in current bio-nanosynthesis. This study reports the use of orange (Citrus × clementina) peel aqueous extract (OPE) for one-pot green synthesis of silver nanoparticles (AgNPs) with high effectiveness against various microbial pathogens as well as rat glial tumor C6 cells. The effects of various operational parameters on the synthesis of AgNPs were systematically investigated. The morphology, particle size, and properties of synthesized AgNPs were characterized using UV-visible spectroscopy, x-ray diffraction, x-ray photoelectron spectroscopy, field emission scanning electron microscopy, energy-dispersive x-ray spectroscopy, and Fourier transform infrared spectroscopy...
March 17, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28303159/antifungal-activity-of-the-ethanol-extract-from-flos-rosae-chinensis-with-activity-against-fluconazole-resistant-clinical-candida
#14
Lulu Zhang, Hui Lin, Wei Liu, Baodi Dai, Lan Yan, YongBing Cao, Yuan-Ying Jiang
This study was designed to investigate the antifungal activity of a hydroalcoholic extract from Flos Rosae Chinensis (FRC) combined with fluconazole (FCZ) against clinical isolates of Candida albicans resistant to FCZ. The minimum inhibitory concentration (MIC) of FRC was determined using a checkerboard microdilution assay. The synergistic effects of the combination of FRC and FCZ against clinical isolates of C. albicans resistant to FCZ were further confirmed by constructing time-growth curves and performing an agar diffusion test...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/28300013/absence-of-correlation-between-vancomycin-consumption-and-minimum-inhibitory-concentration-of-methicillin-resistant-staphylococcus-aureus-isolates
#15
Cezar Vinícius Würdig Riche, Renato Cassol Ferreira da Silva, Jorge Alberto Santiago Ferreira, Cícero Armídio Gomes Dias, Diego Rodrigues Falci
No abstract text is available yet for this article.
March 16, 2017: Infection Control and Hospital Epidemiology
https://www.readbyqxmd.com/read/28298905/type-b-chloramphenicol-acetyltransferases-are-responsible-for-chloramphenicol-resistance-in-riemerella-anatipestifer-china
#16
Li Huang, Hui Yuan, Ma-Feng Liu, Xin-Xin Zhao, Ming-Shu Wang, Ren-Yong Jia, Shun Chen, Kun-Feng Sun, Qiao Yang, Ying Wu, Xiao-Yue Chen, An-Chun Cheng, De-Kang Zhu
Riemerella anatipestifer causes serositis and septicaemia in domestic ducks, geese, and turkeys. Traditionally, the antibiotics were used to treat this disease. Currently, our understanding of R. anatipestifer susceptibility to chloramphenicol and the underlying resistance mechanism is limited. In this study, the cat gene was identified in 69/192 (36%) R. anatipestifer isolated from different regions in China, including R. anatipestifer CH-2 that has been sequenced in previous study. Sequence analysis suggested that there are two copies of cat gene in this strain...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28296056/potential-of-bisbenzimidazole-analogs-toward-metronidazole-resistant-trichomonas-vaginalis-isolates
#17
Travis Korosh, Emmanuel Bujans, Mary Morada, Canan Karaalioglu, Jean Jacques Vanden Eynde, Annie Mayence, Tien L Huang, Nigel Yarlett
A bisoxyphenylene-bisbenzimidazole series with increasing aliphatic chain length (CH2 to C10 H20 ) containing a meta (m) or para (p) benzimidazole linkage to the phenylene ring was tested for ability to inhibit the growth of metronidazole susceptible (C1) and refractory (085) Trichomonas vaginalis isolates under aerobic and anaerobic conditions. Compound 3m, 2,2'-[α,ω-propadiylbis(oxy-1,3-phenylene)]bis-1H-benzimidazole, displayed a 5.5-fold lower minimum inhibitory concentration (MIC) towards T. vaginalis isolate 085 than metronidazole under aerobic growth conditions, (26 μM compared to 145 μM)...
March 10, 2017: Chemical Biology & Drug Design
https://www.readbyqxmd.com/read/28293229/fungal-root-microbiome-from-healthy-and-brittle-leaf-diseased-date-palm-trees-phoenix-dactylifera-l-reveals-a-hidden-untapped-arsenal-of-antibacterial-and-broad-spectrum-antifungal-secondary-metabolites
#18
Fedia B Mefteh, Amal Daoud, Ali Chenari Bouket, Faizah N Alenezi, Lenka Luptakova, Mostafa E Rateb, Adel Kadri, Neji Gharsallah, Lassaad Belbahri
In this study, we aimed to explore and compare the composition, metabolic diversity and antimicrobial potential of endophytic fungi colonizing internal tissues of healthy and brittle leaf diseased (BLD) date palm trees (Phoenix dactylifera L.) widely cultivated in arid zones of Tunisia. A total of 52 endophytic fungi were isolated from healthy and BLD roots of date palm trees, identified based on internal transcribed spacer-rDNA sequence analysis and shown to represent 13 species belonging to five genera. About 36...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28291698/detection-and-analysis-of-different-interactions-between-resistance-mechanisms-and-carbapenems-in-clinical-isolates-of-klebsiella-pneumoniae
#19
Tanise Vendruscolo Dalmolin, Bianca Vendruscolo Bianchini, Grazielle Guidolin Rossi, Ana Carolina Ramos, Ana Cristina Gales, Priscila de Arruda Trindade, Marli Matiko Anraku de Campos
Carbapenems are considered last-line agents for the treatment of serious infections caused by Klebsiella pneumoniae, and this microorganism may exhibit resistance to β-lactam antibiotics due to different mechanisms of resistance. We evaluated 27 isolates of K. pneumoniae resistant to carbapenems recovered from inpatients at the University Hospital of Santa Maria-RS from July 2013 to August 2014. We carried out antimicrobial susceptibility, carbapenemase detection, testing for the presence of efflux pump by broth microdilution and loss of porin by sodium dodecyl sulfate polyacrylamide gel electrophoresis...
February 9, 2017: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/28290267/characterisation-of-penicillin-and-tetracycline-resistance-in-staphylococcus-aureus-isolated-from-bovine-milk-samples-in-minas-gerais-brazil
#20
Caroline L Martini, Carla C Lange, Maria Avp Brito, João B Ribeiro, Letícia C Mendonça, Eliana K Vaz
This Regional Research Communication describes the characterisation of ampicillin, penicillin and tetracycline resistance in Staphylococcus aureus isolated from bovine subclinical mastitis in Minas Gerais State, Brazil. Ninety S. aureus isolates from bovine mastitis exhibiting phenotypic resistance to ampicillin, penicillin and/or tetracycline were selected for this study. The minimum inhibitory concentration (MIC) of each antibiotic was determined using the E-Test® and the production of beta-lactamase was determined by cefinase disks...
March 14, 2017: Journal of Dairy Research
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