Plasmid-Mediated Colistin Resistance in Escherichia coli O157:H7 Cattle and Sheep Isolates and Whole-Genome Sequence of a Colistin-Resistant Sorbitol Fermentative Escherichia coli O157:H7

Microbial Drug Resistance, Ahead of Print.
Source: Microbial Drug Resistance - Category: Microbiology Authors: Source Type: research

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Publication date: December 2019Source: Microbial Pathogenesis, Volume 137Author(s): Sadeq Abdulridha Gatea Kaabi, Hadeel Kareem MusaferAbstractA minimum lethal dose on mice for five bacterial pathogens were identified with PCR of neonatal septicemia of Escherichia coli, Klebsiella pneumoniae, Haemophilus influenzae, Pseudomonas aeruginosa, Citrobacter freundii and Moraxella catarrhalis were studied. Bacteriophage preparations active against 10 isolates of E. coli, 10 isolates of K. pneumoniae, 4 isolates of H. influenzae, 3 isolates of P. aeruginosa, 1 isolate of C. freundii and 1 isolate of M. catarrhalis were tested for ...
Source: Microbial Pathogenesis - Category: Infectious Diseases Source Type: research
ConclusionIt is concluded that NIT resistance in the studied NIT-RE. coli isolates was mainly mediated by nfsA and nfsB alterations.
Source: Journal of Global Antimicrobial Resistance - Category: Infectious Diseases Source Type: research
In this study, we found that mortalin significantly inhibited the replication of porcine epidemic diarrhea virus (PEDV) through restricting virus entry. Mechanistically, a biochemical interaction between the carboxyl terminus of mortalin and clathrin heavy chain (CLTC) was been found, and mortalin could induce CLTC degradation through the proteasomal pathway, thereby inhibiting the clathrin-mediated endocytosis of PEDV into host cells. In addition, artificial changes in mortalin expression affected the cell entry of transferrin, further confirming the above results. Finally, we confirmed that this host-mounted antiviral me...
Source: Veterinary Microbiology - Category: Veterinary Research Source Type: research
Publication date: 15 December 2019Source: Journal of Molecular Liquids, Volume 296Author(s): Subramanian Siva, Changzhu Li, Haiying Cui, Lin LinAbstractIsoeugenol is a natural dual antioxidant/prooxidant. In this research, the inclusion complex (IC) of isoeugenol with 2-hydroxypropyl-β-cyclodextrin (HPβCD) was prepared via the ultrasound (US) method. The US assisted isoeugenol/HPβCD-IC was investigated by various characterization techniques such as UV–Vis absorption, fluorescence, powder X-ray diffraction, Fourier transform infrared spectroscopy, thermal gravimetric analysis and differential scanning c...
Source: Journal of Molecular Liquids - Category: Molecular Biology Source Type: research
This study aims to retrospectively describe and compare treatments of blood culture-confirmed and unconfirmed, but suspected, sepsis within the University of Utah Hospital system. Electronic health records were obtained from 1,248 neonates from January 1, 2006, to December 31, 2017. Sepsis was categorized into early-onset (≤3 days of birth, EOS) and late-onset (>3 and ≤28 days of birth, LOS) and categorized as culture-confirmed sepsis if a pathogen was cultured from the blood and unconfirmed if all blood cultures were negative with no potentially contaminated blood cultures. Of 1,010 neonates in the EOS cohort, 23...
Source: Frontiers in Pharmacology - Category: Drugs & Pharmacology Source Type: research
Trained immunity is the enhanced response of the innate immune system to a secondary infection after an initial encounter with a microorganism. This non-specific response to reinfection is a primitive form of adaptation that has been shown to be conserved from plants to mammals. Insects lack an acquired immune component and rely solely on an innate one, and they have expanded it upon traits of plasticity and adaptation against pathogens in the form of immune priming. The recent discoveries of the role of Saccharomyces cerevisiae in the insect’s ecology and the ability of this yeast to induce trained immunity in diffe...
Source: Frontiers in Microbiology - Category: Microbiology Source Type: research
Besides the major nutrients, phosphorus (P) is an essential mineral for both the host animal and the porcine gut microbiota. Different strategies including phytase supplementation and more recently lactic acid (LA) are used to enhance the P availability from cereals in pig diets; however, their impact on the gut microbiota has been rarely related to fecal shedding of opportunistic pathogens. The present study investigated the effect of phytase supplementation and the treatment of dietary cereals with 2.5% LA on the fecal microbiome composition of metabolic active bacteria and expression of virulence factor genes of enterot...
Source: Frontiers in Microbiology - Category: Microbiology Source Type: research
The IncK plasmid group can be divided into two separate lineages named IncK1 and IncK2. IncK2 is found predominantly in poultry while IncK1 was reported in various mammals, including animals and humans. The physiological basis of this distinction is not known. In this manuscript we examined fitness cost of IncK1 and IncK2 plasmids at 37 and 42°C, which resembles mammalian and chicken body temperatures, respectively. We analyzed conjugation frequency, plasmid copy number and plasmid fitness cost in direct competition. Additionally, we measured levels of σ-32 in Escherichia coli carrying either wild type or conjuga...
Source: Frontiers in Microbiology - Category: Microbiology Source Type: research
This article reports the characterization and evaluation of the biotechnological potential of a cysteine protease purified from Calotropis procera (CpCP3). This enzyme was highly stable to different metal ions and was able to hydrolyze κ-casein similarly to bovine chymosin. Atomic force microscopy showed that the process of casein micelle aggregation induced by CpCP3 was similar to that caused by chymosin. The cheeses made using CpCP3 showed higher moisture content than those made with chymosin, but protein, fat, and ash were similar. The sensory analysis showed that cheeses made with CpCP3 had high acceptance index ...
Source: Food Chemistry - Category: Food Science Source Type: research
Publication date: Available online 13 October 2019Source: Redox BiologyAuthor(s): Kaibo Xie, Marharyta Varatnitskaya, Abdelouahid Maghnouj, Verian Bader, Konstanze F. Winklhofer, Stephan Hahn, Lars I. LeichertAbstractNeutrophils produce a cocktail of oxidative species during the so-called oxidative burst to attack phagocytized bacteria. However, little is known about the neutrophils' redox homeostasis during the oxidative burst and there is currently no consensus about the interplay between oxidative species and cellular signaling, e.g. during the initiation of the production of neutrophil extracellular traps (NETs). Using...
Source: Redox Biology - Category: Biology Source Type: research
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