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https://www.readbyqxmd.com/read/29786847/assessment-of-antibiotic-susceptibility-within-lactic-acid-bacteria-and-coagulase-negative-staphylococci-isolated-from-hunan-smoked-pork-a-naturally-fermented-meat-product-in-china
#1
Jing Wang, Xinyuan Wei, Mingtao Fan
The aim of this study was to evaluate the antibiotic susceptibility of lactic acid bacteria (LAB) and coagulase-negative staphylococci (CNS) strains isolated from naturally fermented smoked pork produced in Hunan, China. A total of 48 strains were isolated by selective medium and identified at the species level by 16S rRNA gene sequencing as follows: Staphylococcus carnosus (23), Lactobacillus plantarum (12), Lactobacillus brevis (10), Lactobacillus sakei (1), Weissella confusa (1), and Weissella cibaria (1)...
May 22, 2018: Journal of Food Science
https://www.readbyqxmd.com/read/29778528/molecular-modeling-synthesis-antibacterial-and-cytotoxicity-evaluation-of-sulfonamide-derivatives-of-benzimidazole-indazole-benzothiazole-and-thiazole
#2
Farha Naaz, Ritika Srivastava, Anuradha Singh, Nidhi Singh, Rajesh Verma, Vishal K Singh, Ramendra K Singh
A new series of heterocyclic molecules bearing sulfonamide linkage has been synthesized and screened for antibacterial activity. During antibacterial screening using broath dilution method, molecules were found to be highly active (MIC value 50-3.1 µg/mL) against different human pathogens, namely B. cerus, S. aureus, E. coli and P. aeruginosa, and most effective against E. coli. A great synergistic effect was observed during determination of FIC where molecules were used in combination with reference drugs chloramphenicol and sulfamethoxazole...
May 11, 2018: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/29772394/antimicrobial-resistance-and-genetic-lineages-of-faecal-enterococci-of-wild-birds-emergence-of-vana-and-vanb2-harboring-enterococcus-faecalis
#3
Houssem Ben Yahia, Sarra Chairat, Nabil Hamdi, Haythem Gharsa, Rym Ben Sallem, Sara Ceballos, Carmen Torres, Karim Ben Slama
Migrating birds have been implicated in pathogen dissemination over long-distances. The lack of data on birds' intestinal microbiota makes these animals a promising path to understand their potential role in the transmission of antibiotic resistant bacteria. This work aims to study the diversity of enterococci species and to analyze the antimicrobial resistant phenotypes/genotypes, as well as the genetic lineages of isolates obtained from faecal and pellet samples of colonial wild birds in Tunisia. Seventy-nine enterococci were recovered of 150 wild bird, after inoculation of samples in Slanetz-Bartley agar, and were identified as E...
May 14, 2018: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/29765275/-tristemma-hirtum-and-five-other-cameroonian-edible-plants-with-weak-or-no-antibacterial-effects-modulate-the-activities-of-antibiotics-against-gram-negative-multidrug-resistant-phenotypes
#4
Gaëlle S Nguenang, Armelle T Mbaveng, Aimé G Fankam, Hermione T Manekeng, Paul Nayim, Brice E N Wamba, Victor Kuete
In order to contribute to the fight against infectious diseases, the in vitro antibacterial activity and the antibiotic-potentiating effects of Tristemma hirtum and five other Cameroonian edible plants have been evaluated against Gram-negative multidrug-resistant (MDR) phenotypes. The microdilution method was used to evaluate the bacterial susceptibility of the extracts and their combination to common antibiotics. The phytochemical screening of the extracts was carried out according to standard methods. Phytochemical analysis of the extracts revealed the presence of alkaloids, triterpenes, steroids, and polyphenols, including flavonoids in most of the tested extracts...
2018: TheScientificWorldJournal
https://www.readbyqxmd.com/read/29763727/antibacterial-activity-of-flavonoid-isolated-from-trianthema-decandra-against-pseudomonas-aeruginosa-and-molecular-docking-study-of-fabz
#5
R Geethalakshmi, Jagadish Chandrabose Sundaramurthi, D V L Sarada
The natural product flavonoid demonstrates an extensive sort of pharmacological properties including antimicrobial activity. Although its Pseudomonas aeruginosa inhibition has been discovered, no target for action against flavonoid has been revealed to date. The anti - P. aeruginosa activity of the 2 - (3', 4' dihydroxy-phenyl) - 3, 5, 7-trihydroxy-chromen-4-one isolated from T. decandra was evaluated by disc diffusion and minimum inhibitory concentration methods. The molecular docking of the flavonoid isolated from T...
May 12, 2018: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29758886/carrier-flies-of-multidrug-resistant-escherichia-coli-as-potential-dissemination-agent-in-dairy-farm-environment
#6
Taila Dos Santos Alves, Gustavo Henrique Batista Lara, Renato Pariz Maluta, Márcio Garcia Ribeiro, Domingos da Silva Leite
The life cycle of synanthropic flies and their behavior, allows them to serve as mechanical vectors of several pathogens. Given that flies can carry multidrug-resistant (MDR) bacteria, this study aimed to investigate the spread of genes of antimicrobial resistance in Escherichia coli isolated from flies collected in two dairy farms in Brazil. Besides antimicrobial resistance determinants, the presence of virulence genes related to bovine colibacillosis was also assessed. Of 94 flies collected, Musca domestica was the most frequently found in the two farms...
August 15, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29757448/quantitative-prevalence-and-characterization-of-campylobacter-from-chicken-and-duck-carcasses-from-poultry-slaughterhouses-in-south-korea
#7
Jung-Whan Chon, Soo-Kyung Lee, Yohan Yoon, Ki-Sun Yoon, Hyo-Sun Kwak, In-Sun Joo, Kun-Ho Seo
The objective of this study was to assess the quantitative prevalence, antibiotic resistance, and molecular subtyping pattern of Campylobacter isolates from chicken and duck products from poultry slaughterhouses in South Korea. A total of 240 chicken (n = 120) and duck (n = 120) carcass samples collected from 12 poultry slaughterhouses between June 2014 and February 2015 in 12 South Korean cities was tested, and 131 samples were positive for Campylobacter. Duck samples showed a higher prevalence (P < 0.05; 93 out of 120) compared to chicken samples (38 out of 120), whereas Campylobacter cell populations from positives were lower (P < 0...
May 10, 2018: Poultry Science
https://www.readbyqxmd.com/read/29755727/antimicrobial-resistance-profile-of-e-coli-isolated-from-raw-cow-milk-and-fresh-fruit-juice-in-mekelle-tigray-ethiopia
#8
Haftay Abraha Tadesse, Netsenet Berhe Gidey, Kidane Workelule, Hagos Hailu, Seyfe Gidey, Abrha Bsrat, Habtamu Taddele
Aim: Foodborne illnesses represent a public health problem in developed and developing countries. They cause great suffering and are transmitted directly or indirectly between animals and humans and circulate in the global environment . E. coli are among them, causing a major public health problem. The aim of this study was therefore to study the antimicrobial resistance profile of E. coli from raw cow milk and fruit juice. Materials and Methods: A cross-sectional study was conducted from October 2016 to June 2017 on 258 samples collected from milk shops ( n = 86), dairy farms ( n = 86), and fruit juice ( n = 86) in different subcities of Mekelle...
2018: Veterinary Medicine International
https://www.readbyqxmd.com/read/29751915/a-simple-and-rapid-lc-ms-ms-method-for-the-determination-of-amphenicols-in-nile-tilapia
#9
Letícia Rocha Guidi, Patrícia Amaral Souza Tette, Maria Beatriz A Gloria, Christian Fernandes
A quantitative method for analysis of amphenicols (chloramphenicol - CAP, thiamphenicol - TAP and florfenicol - FF) in Nile tilapia using LC-MS/MS is described. A simple sample preparation procedure was optimized using a Plackett-Burman design. The method was validated in accordance with Decision 2002/657/EC. Repeatability and reproducibility were less than 10.7% and 16%, respectively, for all compounds. Recoveries varied from 79.8% to 92.0%. CCα was 0.019, 54.81 and 54.93 μg.kg-1 for CAP, FF and TAP, respectively...
October 1, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29751844/prevalence-and-antimicrobial-susceptibility-patterns-of-methicillin-resistant-staphylococcus-aureus-among-janitors-of-mekelle-university-north-ethiopia
#10
Atsebaha Gebrekidan Kahsay, Dawit Gebreegziabher Hagos, Getahun Kahsay Abay, Tadele Araya Mezgebo
OBJECTIVE: The objective of this study was to determine the prevalence of methicillin-resistant Staphylococcus aureus and antimicrobial susceptibility patterns among janitors working at Mekelle University, Tigray, Northern Ethiopia. RESULT: The overall prevalence of S. aureus and MRSA in the present study were 17.97% (69/384) and 6.25% (24/384) respectively. Although not statistically significant, the prevalence of MRSA among janitors working in the medical area (9...
May 11, 2018: BMC Research Notes
https://www.readbyqxmd.com/read/29750801/streptococcus-agalactiae-carriage-among-pregnant-women-living-in-rio-de-janeiro-brazil-over-a-period-of-eight-years
#11
Ana Caroline N Botelho, Juliana G Oliveira, Andreia P Damasco, Késia T B Santos, Ana Flávia M Ferreira, Gabriel T Rocha, Penélope S Marinho, Rita B G Bornia, Tatiana C A Pinto, Marco A Américo, Sergio E L Fracalanzza, Lúcia M Teixeira
Group B Streptococcus (GBS) carriage by pregnant women is the primary risk factor for early-onset GBS neonatal sepsis. Intrapartum antibiotic prophylaxis (IAP) can prevent this transmission route, and two main approaches are recommended to base the selection of pregnant women to be submitted to IAP: the risk-based and the culture-based strategies. In Brazil, compliance to such recommendations is poor, and not much is known about GBS carriage. In the present study, 3,647 pregnant women living in Rio de Janeiro State, Brazil, were screened for GBS anogenital colonization, over a period of 8 years (2008-2015)...
2018: PloS One
https://www.readbyqxmd.com/read/29750585/clustering-analysis-of-antibiograms-and-antibiogram-types-of-streptococcus-agalactiae-strains-from-tilapia-in-china
#12
Chan Liu, Juan Feng, Defeng Zhang, Yundan Xie, Anxing Li, Jiangyong Wang, Youlu Su
In view of the changing antibiotic-resistance profiles of Streptococcus agalactiae from tilapia in China, antimicrobial susceptibilities of 75 S. agalactiae strains were determined by the disc diffusion method, and cluster analyses of the antibiograms and antibiogram types were performed. All strains displayed multidrug resistance (MDR). The antimicrobial-resistance rates were highest (>90%) to aminoglycosides, sulfonamides, pipemidic acid, and norfloxacin, followed by penicillin, ampicillin, and ciprofloxacin (26...
May 11, 2018: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/29750411/effect-of-uv-b-irradiation-on-water-suspended-metarhizium-anisopliae-s-l-hypocreales-clavicipitaceae-conidia-and-their-larvicidal-activity-in-aedes-aegypti-diptera-culicidae
#13
Marianel L Falvo, Patricia Albornoz Medina, Juscelino Rodrigues, Claudia C López Lastra, Juan J García, Éverton K K Fernandes, Christian Luz
Ultraviolet (UV) radiation is a key limiting factor for biological pest control with entomopathogenic fungi. While little is known about the impact of UV on Metarhizium anisopliae Metchnikoff (Sorokin) (Hypocreales: Clavicipitaceae) conidia in aquatic mosquito-breeding sites, this study determined the effect of UV-B on the viability and virulence of M. anisopliae sensu lato (s.l.) strain IP 46 in the laboratory against Aedes aegypti (L.) (Diptera: Culicidae) larvae. Conidia were treated in cups under defined water depths (0, 1, 2, and 3 cm) to six different UV-B doses (0, 0...
May 10, 2018: Journal of Medical Entomology
https://www.readbyqxmd.com/read/29743135/development-of-lateral-flow-immunochromatographic-strips-for-micropollutant-screening-using-colorants-of-aptamer-functionalized-nanogold-particles-part-ii-experimental-verification-with-aflatoxin-b1-and-chloramphenicol
#14
Shan Zhang, Shuai Zhao, Sai Wang, Jiahui Liu, Yiyang Dong
Lateral flow immunochromatographic strips based on colorants of aptamer-functionalized nanogold particles weredeveloped for the detection of micropollutants aflatoxin B1 (AFB1) and chloramphenicol (CAP). The lateral flow immunochromatographic strip was based on a competitive reaction of thiolated-aptamer between micropollutants and bio-DNA probe-streptavidin as capture material immobilized at the test line. General crucial parameters that might influence the sensitivity have been systematically investigated...
May 9, 2018: Journal of AOAC International
https://www.readbyqxmd.com/read/29743001/emergence-of-quinolone-resistant-shigella-flexneri-in-italy-march-2017
#15
Marta Zatta, Stefano Di Bella, Marina Busetti, Valeria Michelacci, Slawomir Owczarek, Ida Luzzi, Roberto Luzzati
In March 2017, a 45-year-old Italian man who has sex with men was admitted to the Infectious Diseases Department of Trieste Hospital (northeast Italy), because of fever, abdominal pain and dysentery. The patient had neither foreign travel history nor sexual contact with non-Italian partners. Stool cultures grew multidrug-resistant Shigella flexneri (resistant to ampicillin, chloramphenicol, streptomycin, tetracycline, trimethoprim, amoxicillin/clavulanic acid and ciprofloxacin) and whole genome sequencing detailed the resistance features...
January 1, 2018: International Journal of STD & AIDS
https://www.readbyqxmd.com/read/29741928/comparative-study-on-antibiotic-resistance-and-dna-profiles-of-salmonella-enterica-serovar-typhimurium-isolated-from-humans-retail-foods-and-the-environment-in-shanghai-china
#16
Zengfeng Zhang, Chenyang Cao, Bin Liu, Xuebin Xu, Yanfei Yan, Shenghui Cui, Sheng Chen, Jianghong Meng, Baowei Yang
We characterized antibiotic resistance profiles, antibiotic resistance-associated genes, and pulsed-field gel electrophoresis (PFGE) patterns of 145 Salmonella enterica serotype Typhimurium isolates from human infections and retail foods that were possibly responsible for salmonellosis outbreaks from 2008 to 2012 in Shanghai, China. Resistance to at least three antibiotics was found in 66.7% of chicken isolates, 76.5% of duck isolates, 77.8% of pork isolates, and 80.5% of human isolates. Seven antibiotic resistance phenotypes were detected in chicken isolates, 16 in pork isolates, 17 in duck isolates, and 50 in human isolates...
May 9, 2018: Foodborne Pathogens and Disease
https://www.readbyqxmd.com/read/29735830/changing-trends-of-culture-positive-typhoid-fever-and-antimicrobial-susceptibility-in-a-tertiary-care-north-indian-hospital-over-the-last-decade
#17
Priyanka Sharma, Sushila Dahiya, Neelam Manral, Bhavana Kumari, Sambuddha Kumar, Sangeeta Pandey, Seema Sood, Bimal Kumar Das, Arti Kapil
Purpose: The present study was undertaken to analyse the trend in prevalence of culture-positive typhoid fever during the last decade and to determine antimicrobial susceptibility profile of Salmonella Typhi and Salmonella Paratyphi A isolated from patients of enteric fever presenting to our hospital. Methods: All the culture-positive enteric fever cases during 2005-2016 presenting to our Hospital were included in the study. Antimicrobial susceptibility was done against chloramphenicol, amoxicillin, co-trimoxazole, ciprofloxacin, ofloxacin, levofloxacin, pefloxacin, ceftriaxone and azithromycin as per corresponding CLSI guidelines for each year...
January 2018: Indian Journal of Medical Microbiology
https://www.readbyqxmd.com/read/29733362/in-vitro-induced-erythromycin-resistance-facilitates-cross-resistance-to-the-novel-fluoroketolide-solithromycin-in-staphylococcus-aureus
#18
Weiming Yao, Guangjian Xu, Bing Bai, Hongyan Wang, Minggui Deng, Jinxin Zheng, Duoyun Li, Xiangbin Deng, Xiaojun Liu, Zhiwei Lin, Zhong Chen, Guiqiu Li, Qiwen Deng, Zhijian Yu
The aim of this study was to determine whether in vitro induced erythromycin resistance facilitates the cross-resistance to the novel fluoroketolide, solithromycin, in Staphylococcus aureus. Four strains of methicillin-susceptible S. aureus strains S2, S3, S5, S7 were successfully induced to establish erythromycin-resistant strains by continuous in vitro culture with erythromycin. Mutations at drug binding sites were shown to increase the minimal inhibitory concentrations for ketolides, including telithromycin and the novel compound solithromycin, but did not increase for lincosamides, chloramphenicols, or oxazolidinones...
May 3, 2018: FEMS Microbiology Letters
https://www.readbyqxmd.com/read/29732219/the-prevalence-of-quinolone-resistance-genes-of-a-b-s-in-escherichia-coli-strains-isolated-from-three-major-hospitals-in-tehran-iran
#19
Hadis Abbasi, Reza Ranjbar
Introduction: Escherichia coli (E.coli) as an opportunistic pathogen is a major cause of the hospital infections. The main goal of this research was to determine the frequency of quinolone resistance genes (qnr) among E.coli pathotypes isolated from patients with urinary tract infections (UTIs). Material and methods: Urine samples were obtained from patients with UTIs in three major hospitals of Mofid, Bu Ali, and Vali-Asr during the year of 2015 in Tehran, Iran...
2018: Central European Journal of Urology
https://www.readbyqxmd.com/read/29730340/determination-of-residual-4-nitrobenzaldehyde-in-chloramphenicol-and-its-pharmaceutical-formulation-by-hplc-with-uv-vis-detection-after-derivatization-with-3-nitrophenylhydrazine
#20
Lan Luo, Congcong Gu, Mingxian Li, Xiangyuan Zheng, Feng Zheng
4-Nitrobenzaldehyde is the synthetic raw material and an important photodegradation product of chloramphenicol. With a structural "alert" of human genotoxic potential and reported mutagenicity, this compound should be controlled in drug substances as a potential genotoxic impurity. However, current analysis methods require complex pre-treatment processes and/or lack sufficient specificity and sensitivity. Nitrophenylhydrazine is a common carbonyl derivatization reagent used to determine the residual aromatic aldehydes in drug samples...
April 21, 2018: Journal of Pharmaceutical and Biomedical Analysis
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