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chloramphenicol

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https://www.readbyqxmd.com/read/29331725/bivo4-n-rgo-nano-composites-as-highly-efficient-visible-active-photocatalyst-for-the-degradation-of-dyes-and-antibiotics-in-eco-system
#1
Brindha Appavu, Sivakumar Thiripuranthagan, Sudhakar Ranganathan, Elangovan Erusappan, Kathiravan Kannan
Herein, we report the synthesis of novel nitrogen doped reduced graphene oxide/ BiVO4 photo catalyst by single step hydrothermal method. The physicochemical properties of the catalysts were characterized using XRD, N2 adsorption-desorption, Raman, XPS, SEM TEM, DRS-UV and EIS techniques. The synthesized catalysts were tested for their catalytic activity in the photo degradation of some harmful textile dyes (methylene blue & congo red) and antibiotics (metronidazole and chloramphenicol) under visible light irradiation...
January 10, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29329849/thermal-degradation-of-chloramphenicol-in-model-solutions-spiked-tissues-and-incurred-samples
#2
Lei Tian, Stéphane Bayen
This study investigated the thermal degradation of a veterinary drug, chloramphenicol, in model solutions (water), as well as in spiked and incurred mussel tissues to understand its fate in the food supply chain. Thermal degradation kinetics followed a first-order model in water (e.g. degradation rate: 0.0018-0.0025 min-1 at 100 °C). After 1 h at 100 °C, the percentage degradation in spiked tissues (28.1 ± 7.1%) was significantly different (p < .05) from the values in water (14.2 ± 1...
May 15, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29325866/2-2-nitrovinyl-furan-exacerbates-oxidative-stress-responses-of-escherichia-coli-to-bacteriostatic-and-bactericidal-antibiotics
#3
T O Ajiboye
The influence of 2-(2-nitrovinyl) furan on the antibiotic activities of selected bacteriostatic and bactericidal antibiotics was investigated. Minimum inhibitory concentration and fractional inhibitory concentration index were determined to evaluate the interaction between 2-(2-nitrovinyl) furan and the antibiotics. 2-(2-nitrovinyl) furan exhibited additive interactions with chloramphenicol, erythromycin, lincomycin and gemifloxacin. However, synergistic interaction was observed with amoxicillin, ampicillin and ciprofloxacin...
January 8, 2018: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29323530/prevalence-and-molecular-characterization-of-antimicrobial-resistance-in-escherichia-coli-isolated-from-raw-milk-and-raw-milk-cheese-in-egypt
#4
Rabee A Ombarak, Atsushi Hinenoya, Abdel-Rahman M Elbagory, Shinji Yamasaki
The goal of this study was to examine antimicrobial resistance and characterize the implicated genes in 222 isolates of Escherichia coli from 187 samples of raw milk and the two most popular cheeses in Egypt. E. coli isolates were tested for susceptibility to 12 antimicrobials by a disk diffusion method. Among the 222 E. coli isolates, 66 (29.7%) were resistant to one or more antimicrobials, and half of these resistant isolates showed a multidrug resistance phenotype (resistance to at least three different drug classes)...
January 11, 2018: Journal of Food Protection
https://www.readbyqxmd.com/read/29320984/prevalence-and-antibiotic-susceptibility-of-uropathogens-from-cases-of-urinary-tract-infections-uti-in-shashemene-referral-hospital-ethiopia
#5
Wubalem Desta Seifu, Alemayehu Desalegn Gebissa
BACKGROUND: Urinary tract infection (UTI) remains to be one of the most common infectious diseases diagnosed in developing countries. And a widespread use of antibiotics against uropathogens has led to the emergence of antibiotic resistant species. A laboratory based cross-sectional survey was conducted in Shashemene referral hospital to determine the prevalence and antibiotic susceptibility of uropathogens. METHODS: We have collected 384 clean catch mid-stream urine samples from all suspected UTI outpatients using sterile screw capped container...
January 10, 2018: BMC Infectious Diseases
https://www.readbyqxmd.com/read/29310232/electrochemical-aptasensor-for-multi-antibiotics-detection-based-on-endonuclease-and-exonuclease-assisted-dual-recycling-amplification-strategy
#6
Shengfeng Huang, Ning Gan, Tianhua Li, You Zhou, Yuting Cao, Youren Dong
An ultrasensitive electrochemical aptasensor for multiplex antibiotics detection based on endonuclease and exonuclease assisted dual recycling amplification strategy was proposed. Kanamycin and chloramphenicol were selected as candidates. Firstly, aptamers of the antibiotics were immobilized on bar A and then binding with their endonuclease labeled complementary DNA strands to construct enzyme-cleavage probes. Secondly, The nano zirconium-metal organic framework (NMOF) particles with 1,4-benzene-dicarboxylate (BDC) as linker was defined as UiO-66...
March 1, 2018: Talanta
https://www.readbyqxmd.com/read/29307119/genetic-characterization-of-phenicol-resistant-escherichia-coli-and-role-of-wild-type-repressor-regulator-gene-acrr-on-phenicol-resistance
#7
Muhammad Yaqoob, Li Ping Wang, Jam Kashif, Javed Memon, Sajid Umar, Muhammad Farooq Iqbal, Muhammad Fiaz, Cheng-Ping Lu
The genetic basis for phenicol resistance was examined in 38 phenicol-resistant clinical Escherichia coli isolates from poultry. Out of 62 isolates, 38 showed resistance for chloramphenicol and nine for florfenicol, respectively. Each strain also demonstrated resistance to a variety of other antibiotics. Molecular detection revealed that the incidence rates of the cat1, cat2, flo, flo-R, cmlA, and cmlB were 32, 29, 18, 13, 0, and 0%, respectively. Nineteen strains were tolerant to organic solvents. PCR amplification of the complete acrR (regulator/repressor) gene of five isolates revealed the amino acid changes in four isolates...
January 6, 2018: Folia Microbiologica
https://www.readbyqxmd.com/read/29303023/a-multicentre-survey-of-the-antibiotic-susceptibility-of-clinical-bacteroides-species-from-hungary
#8
Károly Péter Sárvári, József Sóki, Katalin Kristóf, Emese Juhász, Cecília Miszti, Krisztina Latkóczy, Szilvia Zsóka Melegh, Edit Urbán
BACKGROUND: The species of the Bacteroides fragilis group are important components of human microbiota, but as opportunistic pathogens they can be the causative agents of severe infections. METHODS: The major aims of our investigation were the evaluation of the susceptibility of 400 different Hungarian B. fragilis group isolates to 10 antibiotics by the agar dilution method, the comparison of our resistance data with previous national and international antibiotic resistance data and the comparison of present data in regional aspect...
January 5, 2018: Infectious Diseases
https://www.readbyqxmd.com/read/29302800/analysis-of-fungi-in-aerosols-dispersed-by-high-speed-pens-in-dental-clinics-from-teresina-piaui-brazil
#9
Aline Maria Alves Vilarinho Oliveira, Rômulo Maia de Alencar, Jhonatas Cley Santos Porto, Isla Rita Brito Fontenele Ramos, Iraci Salmito Noleto, Tanit Clementino Santos, Mitra Mobin
This quantitative and qualitative study aimed to evaluate the level of fungal contamination in aerosols dispersed by high rotation pens in dental clinics from Teresina, Piaui, Brazil. The data were collected during the attendance at two dental clinics. Petri dishes containing Sabouraud agar with chloramphenicol were opened for 15 min in the following places: in front of the chair, on the partitions to the right and left of the chair, and in the neighboring workbench. The plates were incubated at room temperature to allow the fungal growth and subsequent species identification...
January 4, 2018: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29299864/the-effect-of-temperature-on-airborne-filamentous-fungi-in-the-indoor-and-outdoor-space-of-a-hospital
#10
Fariba Abbasi, Mohammad Reza Samaei
Fungi are one of the bioaerosols in indoor air of hospitals. They have adverse effects on staff and patients. The aim of this study was to investigate the effects of three incubation temperature on the density and composition of airborne fungi in an indoor and outdoor space of hospital. Sabouraud dextrose agar was used for culture the fungi. For improvement of aseptic properties, chloramphenicol was added to this medium. The density of airborne fungi was less than 282 CFU/m3. The highest density was detected in emergency room and the lowest of them was in neonatal intensive care unit (NICU) and operation room (OR)...
January 3, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29290451/major-diseases-extensive-misuse-and-high-antimicrobial-resistance-of-escherichia-coli-in-large-and-small-scale-dairy-cattle-farms-in-jordan
#11
Mohammad M Obaidat, Alaa E Bani Salman, Margaret A Davis, Amira A Roess
This study aimed to determine the major diseases, antimicrobial use, and resistance in commensal Escherichia coli in dairy cattle in Jordan. Forty-three (large, n = 21; small, n = 22) farms were surveyed. A validated questionnaire was administered to the herdsmen to elicit information about disease prevalence, antimicrobial knowledge, and antimicrobial use. In addition, fecal samples were collected from 5 lactating animals on each farm. A total of 520 E. coli isolates were tested for resistance to 12 antimicrobials...
December 28, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/29283576/accurate-quantitation-and-analysis-of-nitrofuran-metabolites-chloramphenicol-and-florfenicol-in-seafood-by-uhplc-ms-ms-method-validation-and-regulatory-samples
#12
Fadi Aldeek, Kevin Hsieh, Obiadada Ugochukwu, Ghislain Gerard, Walter Hammack
We developed and validated a method for the extraction, identification, and quantitation of four nitrofuran metabolites: (3-amino-2-oxazolidinone (AOZ); 3-amino-5-morpholinomethyl-2-oxazolidinone (AMOZ); semicarbazide (SC); and 1-aminohydantoin (AHD)), as well as chloramphenicol and florfenicol, in a variety of seafood commodities. Samples were extracted by liquid-liquid extraction techniques, analyzed by UHPLC-MS/MS, and quantitated using commercially sourced, derivatized nitrofuran metabolites, with their isotopically-labelled internal standards in-solvent...
December 28, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29279444/detection-of-escherichia-coli-producing-ctx-m-1-group-extended-spectrum-%C3%AE-lactamases-from-pigs-in-aichi-prefecture-japan-between-2015-and-2016
#13
Chihiro Norizuki, Kumiko Kawamura, Jun-Ichi Wachino, Masahiro Suzuki, Noriyuki Nagano, Takaaki Kondo, Yoshichika Arakawa
We investigated the prevalence and characteristics of extended-spectrum β-lactamase (ESBL)-producing Escherichia coli isolates from Japanese pigs. A total of 345 pig fecal specimens were collected from 30 farms in Aichi prefecture, Japan, between June 2015 and April 2016, and 22 unique ESBL-producing E. coli were isolated from 16 samples of eight farms. The ESBL types included CTX-M-15 (54.5%), CTX-M-55 (27.2%), CTX-M-3 (0.9%), and CTX-M-14 (0.9%). The predominant plasmid replicon type was IncN, and they carried blaCTX-M-55...
December 26, 2017: Japanese Journal of Infectious Diseases
https://www.readbyqxmd.com/read/29279443/epidemiology-and-antibiogram-profile-of-vibrio-cholerae-isolates-between-2004-2013-from-odisha-india
#14
Bibhuti Bhusan Pal, Smruti Ranjan Nayak, Hemant Kumar Khuntia
Cholera is an acute diarrhoeal disease caused by Vibrio cholerae O1 and O139 serogroups which are known to cause epidemics of cholera in Odisha. The present study has been envisaged to document the antibiotic resistance pattern among clinical isolates of both serogroups of V.cholerae O1 and O139 isolated during 2004-2013. Nine hundred nine isolates of V.cholerae were included in this study which were identified by standard procedures. Antibiotic sensitivity test was performed by disc diffusion method. The seasonality of cholera in this region indicated that there was one peak observed in the rainy season only...
December 26, 2017: Japanese Journal of Infectious Diseases
https://www.readbyqxmd.com/read/29274964/prevalence-of-salmonella-enterica-listeria-monocytogenes-and-pathogenic-escherichia-coli-in-bulk-tank-milk-and-milk-filters-from-us-dairy-operations-in-the-national-animal-health-monitoring-system-dairy-2014-study
#15
Jakeitha L Sonnier, Jeffrey S Karns, Jason E Lombard, Christine A Kopral, Bradd J Haley, Seon-Woo Kim, Jo Ann S Van Kessel
The dairy farm environment is a well-documented reservoir for zoonotic pathogens such as Salmonella enterica, Shiga-toxigenic Escherichia coli, and Listeria monocytogenes, and humans may be exposed to these pathogens via consumption of unpasteurized milk and dairy products. As part of the National Animal Health Monitoring System Dairy 2014 study, bulk tank milk (BTM, n = 234) and milk filters (n = 254) were collected from a total of 234 dairy operations in 17 major dairy states and analyzed for the presence of these pathogens...
December 20, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/29274459/killing-of-s-aureus-in-murine-peritoneal-macrophages-by-ascorbic-acid-along-with-antibiotics-chloramphenicol-or-ofloxacin-correlation-with-inflammation
#16
Somrita Dey, Biswadev Bishayi
Alarming increase of death due to S. aureus sepsis demands newer treatment strategies. Enhancement of antibiotic resistant S. aureus strains caused increased mortality. Only antibiotic treatment for Staphylococcal sepsis has been found insufficient to improve outcomes. In the innate immune response, phagocytosis mediated killing of pathogen and further triggering of intracellular signaling cascades by the PRRs culminates in the release of a variety of pro inflammatory cytokines, which orchestrate together in the early host response to infection...
December 20, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29274400/conditional-mitotimer-reporter-mice-for-assessment-of-mitochondrial-structure-oxidative-stress-and-mitophagy
#17
Rebecca J Wilson, Joshua C Drake, Di Cui, Mei Zhang, Heather M Perry, Jennifer A Kashatus, Christine M Kusminski, Philipp E Scherer, David F Kashatus, Mark D Okusa, Zhen Yan
Assessment of structural and functional changes of mitochondria is vital for biomedical research as mitochondria are the power plants essential for biological processes and tissue/organ functions. Others and we have developed a novel reporter gene, pMitoTimer, which codes for a redox sensitive mitochondrial targeted protein that switches from green fluorescence protein (GFP) to red fluorescent protein (DsRed) when oxidized. It has been shown in transfected cells, transgenic C. elegans and Drosophila m., as well as somatically transfected adult skeletal muscle that this reporter gene allows quantifiable assessment of mitochondrial structure, oxidative stress, and lysosomal targeting of mitochondria-containing autophagosomes...
December 20, 2017: Mitochondrion
https://www.readbyqxmd.com/read/29261161/quantitative-and-sensitive-detection-of-chloramphenicol-by-surface-enhanced-raman-scattering
#18
Yufeng Ding, Xin Zhang, Hongjun Yin, Qingyun Meng, Yongmei Zhao, Luo Liu, Zhenglong Wu, Haijun Xu
We used surface-enhanced Raman scattering (SERS) for the quantitative and sensitive detection of chloramphenicol (CAP). Using 30 nm colloidal Au nanoparticles (NPs), a low detection limit for CAP of 10-8 M was obtained. The characteristic Raman peak of CAP centered at 1344 cm-1 was used for the rapid quantitative detection of CAP in three different types of CAP eye drops, and the accuracy of the measurement result was verified by high-performance liquid chromatography (HPLC). The experimental results reveal that the SERS technique based on colloidal Au NPs is accurate and sensitive, and can be used for the rapid detection of various antibiotics...
December 20, 2017: Sensors
https://www.readbyqxmd.com/read/29258622/nasal-colonization-and-antimicrobial-susceptibility-pattern-of-staphylococcus-aureus-among-pre-school-children-in-ethiopia
#19
Alemayehu Reta, Moges Wubie, Getnet Mekuria
BACKGROUND: Staphylococcus aureus is one of the bacterium that can asymptomatically colonize the human upper respiratory tract (i.e. nose and throat). Carriage of S. aureus, including methicillin resistant S. aureus, is common to children. The aim at this study was to determine the nasal colonization, associated factors and antimicrobial susceptibility patterns of S. aureus isolates among pre-school children in Debre Markos town. METHODS: Institutional-based cross sectional study was conducted...
December 19, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/29246178/discovery-of-the-fourth-mobile-sulfonamide-resistance-gene
#20
Mohammad Razavi, Nachiket P Marathe, Michael R Gillings, Carl-Fredrik Flach, Erik Kristiansson, D G Joakim Larsson
BACKGROUND: Over the past 75 years, human pathogens have acquired antibiotic resistance genes (ARGs), often from environmental bacteria. Integrons play a major role in the acquisition of antibiotic resistance genes. We therefore hypothesized that focused exploration of integron gene cassettes from microbial communities could be an efficient way to find novel mobile resistance genes. DNA from polluted Indian river sediments were amplified using three sets of primers targeting class 1 integrons and sequenced by long- and short-read technologies to maintain both accuracy and context...
December 15, 2017: Microbiome
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