journal
MENU ▼
Read by QxMD icon Read
search

Microbial Pathogenesis

journal
https://www.readbyqxmd.com/read/29162483/altered-expression-of-cxcr1-il-8r-in-macrophages-utilizing-cell-surface-tnfr1-and-il-1-receptor-during-staphylococcus-aureus-infection
#1
Biswadev Bishayi, Rana Adhikary, Sahin Sultana, Rajen Dey, Ajeya Nandi
Currently, very few studies are available on the expression of CXCR1 in mouse macrophages having both intact TNFR1 and IL-1R or their deficiency in relation to acute S. aureus infection. Peritoneal macrophages from mice neutralized singly for TNFR1or IL-1R, or for both TNFR1 and IL-1R were infected with S. aureus in vitro and their ability to secrete cytokines and reactive oxygen species (ROS) were determined. It was observed that the release TNF-α and IL-1β in response to S. aureus infection was decreased in macrophages when both TNFR1 and IL-1R were neutralized...
November 18, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29162482/antimicrobial-activity-of-melaleuca-alternifolia-nanoparticles-in-polymicrobial-biofilm-in-situ
#2
Márcia Ebling de Souza, Dariane Jornada Clerici, Camila Marina Verdi, Gabriela Fleck, Priscilla Maciel Quatrin, Luana Ebling Spat, Pauline Cordenonsi Bonez, Camilla Fillippi Dos Santos, Raquel Pippi Antoniazzi, Fabrício Batistin Zanatta, André Gundel, Diego Stefani Teodoro Martinez, Rodrigo de Almeida Vaucher, Roberto Christ Vianna Santos
Microbial biofilms represent a challenge in the treatment of infections, due to the low efficacy of the antimicrobials. This study evaluated the antimicrobial effect of nanoparticles of Melaleuca alternifolia (TTO) in dental biofilm. Thirty-eight volunteers used an oral device in situ in situ including four bovine enamel specimens for 07 days. From the fifth day four solutions were applied randomly for each specimen: Physiological Saline Solution (0.85% NaCl) (C+), Chlorhexidine 0.12% (CHX), M. alternifolia oil 0...
November 18, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29155010/intra-amoebal-killing-of-mycobacterium-ulcerans-by-acanthamoeba-griffini-a-co-culture-model
#3
Amar Bouam, Eric Ghigo, Michel Drancourt
Mycobacterium ulcerans, a decaying Mycobacterium marinum derivative is responsible for Buruli ulcer, a notifiable non-contagious disabling infection highly prevalent in some West African countries. Aquatic environments are suspected to host M. ulcerans, however, the exact reservoirs remain unknown. While M. marinum was found to resist amoebal microbicidal activities, this remains unknown for M. ulcerans. In this study M. ulcerans was co-cultured with the moderately halophile Acanthamoeba griffini at 30 °C to probe this tropical amoeba as a potential reservoir for M...
November 17, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29155127/mdr1-gene-c3435t-polymorphism-in-chronic-hepatitis-c-patients
#4
Mehdi Parsanahad, Manoochehr Makvandi, Ali Teimoori, Shahram Jalilian, Gholamabas Kayedani, Sara Mahmoodi
BACKGROUND: MDR1 is a highly polymorphic gene that encodes P-glycoprotein (P-gp). This protein anchor to the cell membrane and transports toxins, xenobiotic, chemicals, and drugs from the intracellular to extracellular and thus protect cells. Polymorphism of the MDR1 gene seems to be effective in gene expression and response to treatment. Since one of the main mechanisms of drug resistance is the removal of the drug from the cell by ATP-dependent efflux proteins, thus MDR1, single nucleotide polymorphism (SNP) C3435T can be used as a predictor for treatment outcomes...
November 15, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29155126/treatment-strategy-by-lactoperoxidase-and-lactoferrin-combination-immunomodulatory-and-antibacterial-activity-against-multidrug-resistant-acinetobacter-baumannii
#5
Likaa Mahdi, Nada Mahdi, Sana'a Al-Kakei, Hadeel Musafer, Ikbal Al-Joofy, Rajwa Essa, Luma Zwain, Istabreq Salman, Haifa Mater, Shaymaa Al-Alak, Rasha Al-Oqaili
Lactoperoxidase (Lpo) and Lactoferrin (Lf) were extracted from camel colostrum milk and purified. The antibacterial activity of the two purified proteins was estimated against 14 isolates of multidrug resistance Acinetobacter baumannii. A combination of Lpo and Lf exhibited bactericidal action against A. baumannii in vitro. A mouse model of acute A. baumannii pneumonia was improved. The injection of combined Lpo and Lf after infection leads to significant clearance of A. baumannii rates in lung as well as blood culture P < 0...
November 15, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29155125/virulence-characteristics-and-molecular-relatedness-of-methicillin-resistant-staphylococcus-aureus-harboring-different-staphylococcal-cassette-chromosome-mec
#6
Rana El-Baz, Dina E Rizk, Rasha Barwa, Ramadan Hassan
INTRODUCTION: Methicillin resistant Staphylococcus aureus (MRSA) is a versatile pathogen capable of causing multitude of human diseases. It is one of the most important nosocomial pathogen that implicated in community and healthcare associated infections. Therefore, this study aims to characterize different SCCmec elements found in MRSA isolates. Moreover, molecular typing was performed to investigate the genetic relatedness among MRSA isolates. METHODS: Phenotypic identification of MRSA was done by disc diffusion method...
November 15, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29155011/evaluation-the-cytotoxic-effect-of-cytotoxin-producing-klebsiella-oxytoca-isolates-on-the-hep-2%C3%A2-cell-line-by-mtt-assay
#7
Mohammad Mehdi Soltan Dallal, Majid Validi, Masoumeh Douraghi, Jalil Fallah Mehrabadi, Leila Lormohammadi
BACKGROUND: The cytotoxic effects on epithelial cells of the human are not observed in other strains of Klebsiella spp and are only observed in K. oxytoca strains. MTT assay was used to evaluate cytotoxic activity. In this study, colorimetric method was used to evaluate the cytotoxic effect of cytotoxin-producing isolates on Hep-2 cell line and determines the percentage of surviving cells. MATERIALS AND METHODS: In this study, we collected a total of 75 K. oxytoca strains isolate and we detected the production of toxins and their cytotoxic effects on HEp-2 cells...
November 14, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29146501/antibacterial-activity-and-probiotic-characterization-of-autochthonous-paenibacillus-polymyxa-isolated-from-anabas-testudineus-bloch-1792
#8
Sebastian J Midhun, Sahadevan Neethu, A Vysakh, Damodaran Arun, E K Radhakrishnan, Mathew Jyothis
Microbial fish pathogens are prevalent in aquaculture. Control of Bacterial fish pathogens is important and bio control of pathogenic bacteria is a novel field of study. The aim of this study was to evaluate the antagonistic activity of bacteria isolated from Anabas testudineus against potent fish pathogens. The cellular components/preparations and filtered cell free culture supernatants were effective against six fish pathogens. Altogether 110 strains were isolated from fish proximal and distal intestine, out of which 10 strains were selected through well diffusion method...
November 13, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29146500/motility-biofilm-formation-apoptotic-effect-and-virulence-gene-expression-of-atypical-salmonella-typhimurium-outside-and-inside-caco-2-cells
#9
Ibtissem Chakroun, Abdelkarim Mahdhi, Patricia Morcillo, Hector Cordero, Alberto Cuesta, Amina Bakhrouf, Kacem Mahdouani, M Ángeles Esteban
Disease outbreaks related to waterborne pathogen contamination throughout the world as well as challenges that lie ahead for addressing persistent infection are of renewed interest. In this research, we studied the effects of prolonged exposure of Salmonella enterica serovar Typhimurium to the cues encountered in the extracellular environment particularly in seawater microcosm on bacterial virulence and subsequent infection in Caco-2 cells. Our data show a significant difference in biofilm formation, swimming and swarming motilities between normal and stressed cells of S...
November 13, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29146499/antimicrobial-resistance-and-virulence-genes-profiling-of-methicillin-resistant-staphylococcus-aureus-isolates-in-a-burn-center-a-5-year-study
#10
Bei Jiang, Supeng Yin, Bo You, Yali Gong, Guangtao Huang, Zichen Yang, Yulong Zhang, Yu Chen, Jing Chen, Zhiqiang Yuan, Xiaomei Hu, Yizhi Peng
Methicillin-resistant S. aureus (MRSA) has attracted more and more attention in recent years, especially in burn medical centers. Here we conducted a 5-year period study to evaluate the MRSA infection in our burn center. The staphylococcal chromosomal cassette mec (SCCmec) typing, antimicrobials susceptibility and virulence profiles were also performed among the MRSA isolates. Of the 259 S. aureus isolates, 239 (92.28%) isolates were identified as MRSA. A decreased trend of MRSA isolation rate over time was found (P = 0...
November 13, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29146498/synthesis-and-characterization-of-silver-nanoparticles-using-gelidium-amansii-and-its-antimicrobial-property-against-various-pathogenic-bacteria
#11
Arivalagan Pugazhendhi, Desika Prabakar, Jaya Mary Jacob, Indira Karuppusamy, Rijuta Ganesh Saratale
Microfouling is evolving at a fast rate causing augmented mortality rates and damage worldwide. Until now, several remedial measures have been exploited to overcome microfouling, amongst them nanoparticles play a superior role. Currently, green synthesized nanoparticles have been centered owing to its eco-friendly, cost effectively and non-toxic nature which has also increased its industrial applications (biomedicine, food and textile). In the present research Silver Nanoparticles (Ag NPs) synthesized using marine red algae Gelidium amansii...
November 13, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29146497/nocardiosis-from-1888-to-2017
#12
REVIEW
Mehdi Fatahi-Bafghi
The genus Nocardia is an aerobic bacterium, Gram-positive and catalase positive that is in Nocardiaceae family. This bacterium first described by Edmond Nocard in 1888 and is not in human commensal bacteria. To date, nocardiosis incidence is increasing due to increase population growth rate, increase in patients with immune disorder diseases and immunocompromised patients. We surveyed taxonomic position, isolation methods, phenotypic and molecular identification at the genus and species levels, antibiogram, treatment and epidemiology in the world from 1888 to 2017...
November 13, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29146496/euterpe-oleracea-pulp-extract-chemical-analyses-antibiofilm-activity-against-staphylococcus-aureus-cytotoxicity-and-interference-on-the-activity-of-antimicrobial-drugs
#13
Marcus Vinícius Dias-Souza, Renan Martins Dos Santos, Isabela Penna Cerávolo, Gustavo Cosenza, Pedro Henrique Ferreira Marçal, Flávio Jr Barbosa Figueiredo
Euterpe oleracea (Açaí) fruit are widely consumed at the Brazilian Amazon region, and biological potentials such as immunomodulatory and antioxidant have been described for its extracts. However, its antimicrobial properties remain poorly investigated. Here, the antimicrobial and antibiofilm activities of the methanolic extract of an artisanally-manufactured açaí pulp (MEAP) were evaluated against clinical isolates of Staphylococcus aureus. Besides, MEAP interference on the activity of antimicrobial drugs of clinical relevance was explored, and its cytotoxicity against hepatocellular carcinoma cells (HepG2) was investigated...
November 13, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29146495/polysaccharides-from-citrus-grandis-l-osbeck-suppress-inflammation-and-relieve-chronic-pharyngitis
#14
Liyan Chen, Yongfeng Lai, Lei Dong, Shasha Kang, Xiumei Chen
Chronic pharyngitis, a common inflammation of the pharyngeal mucosa, is often caused by bacteria, viruses, alcohol abuse, overuse of the voice and cigarettes. This study aimed to explore the effects of polysaccharides of Citrus grandis L. Osbeck (PCG) in relieving chronic pharyngitis and illustrate the underlying mechanisms. Polysaccharides were obtained from PCG by column chromatographic extraction. Six clinical symptom scores, such as the severity of itchy throat, hoarseness, pain, odynophagia, cough and otalgia were evaluated in chronic pharyngitis patients after the oral intake of PCG...
November 13, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29138086/eugenol-derivatives-prospectively-inhibit-l-asparaginase-a-heady-target-protein-of%C3%A2-salmonella-typhimurium
#15
Archana Vimal, Anubhuti Jha, Awanish Kumar
Salmonella typhimurium is the causative agent of severe human infections and mortality throughout the world. Pacing advent of new resistance mechanisms in this microorganism exists, rendering treatment of infectious disease difficult. Ciprofloxacin is no longer considered the first choice of antimicrobial agent due to the emergence of resistance. Therefore, the need for scenario is to find out novel drug target and its potential inhibitor to fight against this pathogen. The present study was undertaken to find out a novel drug target and its inhibitor for improving the current therapeutic methods for treating Salmonella infections...
November 11, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29138085/in-silico-design-cloning-expression-and-immunologic-evaluation-of-ed-fusion-protein-of-nt-h-influenzae
#16
Ava Behrouzi, Saeid Bouzari, Mana Oloomi, Abolfaz Fateh, Farzam Vaziri, Parviz Afrough, Amir Amanzadeh, Seyed Davar Siadat
Infections due to nontypeable Haemophilus influenzae (NTHi) are important causes of child mortality throughout the world. Given the lack of effective vaccines for these strains and the spread and prevalence of these infections in the world, it is necessary to design novel vaccine candidates against these strains. D and E proteins are conserved membrane-specific lipoproteins among encapsulated and non-encapsulated H. influenza strains, which, according to the exposure surface and conservation degree between both strains, can be considered as vaccine candidates suitable for studies...
November 11, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29138084/determination-immunogenic-property-of-truncated-mrph-flic-as-a-vaccine-candidate-against-urinary-tract-infections-caused-by-proteus-mirabilis
#17
Zakaria Bameri, Mohammad Reza Asadi Karam, Mehri Habibi, Parastoo Ehsani, Saeid Bouzari
Proteus mirabilis is common cause of urinary tract infections (UTIs) especially in complicated UTIs which are resistant to antibiotic therapy, Consequently, an ideal vaccine is inevitably required. The N-terminal domain of MrpH (Truncated form of MrpH) lies between the most critical antigens of P. mirabilis to consider as vaccine candidate. FliC of Salmonella typhimurium induces several pathways of immunity system, which leads to produce antibody and cytokines. In this study, adjuvant properties of FliC and efficacy of truncated MrpH as important antigen, in tMrpH...
November 11, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29138083/adaptations-in-the-physiological-heterogeneity-and-viability-of-shigella-dysenteriae-shigella-flexneri-and-salmonella-typhimurium-after-exposure-to-simulated-gastric-acid-fluid
#18
Atheesha Singh, Tobias George Barnard
Stomach acidity is an important barrier of the human body to protect itself from microbial pathogens entering the small intestine and causing infection. This study examined the survival adaptations of non-acid adapted diarrheal Shigella and Salmonella strains in an environment mimicking the human stomach. The bacterial responses to the challenge of acidic simulated gastric fluid were studied using flow cytometry physiological heterogeneity, membrane integrity and survival (culturability) respectively. Flow cytometry showed that bacterial cells, when exposed to gastric fluid, transformed distinctly, into physiologically heterogeneous sub-populations: intact, stressed and damaged cells, when stained with propidium iodide and thiazole orange...
November 11, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29138082/synthesis-of-chitosan-alginate-microspheres-with-high-antimicrobial-and-antibiofilm-activity-against-multi-drug-resistant-microbial-pathogens
#19
Rajagopalan Thaya, Baskaralingam Vaseeharan, Jeyachandran Sivakamavalli, Arokiadhas Iswarya, Marimuthu Govindarajan, Naiyf S Alharbi, Shine Kadaikunnan, Mohammed N Al-Anbr, Jamal M Khaled, Giovanni Benelli
The successful treatment of multi-drug resistant microbial pathogens represents a major challenge for public health management. Here, chitosan-alginate (CS/ALG) microspheres with narrow size distribution were fabricated by ionically cross linking method using Ca(2+) ions as agents for polymer solidification. The physicochemical properties of CS/ALG microspheres, such as surface morphology and size, were studied by SEM. The functional group interactions were confirmed by Fourier transform infrared (FTIR) spectroscopy...
November 11, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29133276/de-novo-assembly-and-annotation-of-the-whole-genomic-analysis-of-vibrio-campbellii-rt-1-strain-from-infected-shrimp-litopenaeus-vannamei
#20
R Thirugnanasambandam, D Inbakandan, L Stanley Abraham, C Kumar, S M Sundaram, B Subashni, R Vasantharaja, A Arul Anantha Kumar, R Kirubagaran, S Ajmal Khan, T Balasubramanian
OBJECTIVES: This study aimed to sequence the whole genome of Vibrio campbellii RT-1 strain. METHODS: V. campbellii strain was isolated from an infected shrimp, Litopenaeus vannamei collected from aquaculture ponds, India (12.1899° N, 79.9249° E). The whole genome sequencing (WGS) was performed using the Illumina Hiseq 2500 platform and assembled de novo using SPAdes and Velvet optimiser. Furthermore, the gene prediction and annotation were performed by a rapid prokaryotic genome tool-Prokka...
November 11, 2017: Microbial Pathogenesis
journal
journal
29276
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"