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https://www.readbyqxmd.com/read/29245049/effects-of-priming-with-cytokines-on-intracellular-survival-and-replication-of-rhodococcus-equi-in-equine-macrophages
#1
Londa J Berghaus, Steeve Giguère, Angela I Bordin, Noah D Cohen
Rhodococcus equi is a common cause of pneumonia in foals and an opportunistic pathogen in immunosuppressed people. The ability of R. equi to survive and replicate in macrophages is the basis of its pathogenicity. Limited knowledge about the role of cytokines in host defense against R. equi comes from studies in mice and the role of cytokines in intracellular survival of R. equi in equine macrophages is unknown. The objectives of this study were to determine the effect of priming with interferon (IFN)-γ, interleukin (IL)-1β, IL-4, IL-6, IL-10, or tumor necrosis factor (TNF)-α at various concentrations on intracellular survival of virulent R...
December 12, 2017: Cytokine
https://www.readbyqxmd.com/read/29239754/characterization-of-rhodococcus-sp-a5wh-isolated-from-a-high-altitude-andean-lake-to-unravel-the-survival-strategy-under-lithium-stress
#2
Carolina Belfiore, María V Curia, María E Farías
Lithium (Li) is widely distributed in nature and has several industrial applications. The largest reserves of Li (over 85%) are in the so-called "triangle of lithium" that includes the Salar de Atacama in Chile, Salar de Uyuni in Bolivia and Salar del Hombre Muerto in Argentina. Recently, the use of microorganisms in metal recovery such as copper has increased; however, there is little information about the recovery of lithium. The strain Rhodococcus sp. A5wh used in this work was previously isolated from Laguna Azul...
November 24, 2017: Revista Argentina de Microbiología
https://www.readbyqxmd.com/read/29239016/intestinal-and-hepatic-contributions-to-the-pharmacokinetic-interaction-between-gamithromycin-and-rifampicin-after-single-dose-and-multiple-dose-administration-in-healthy-foals
#3
S Berlin, S Wallstabe, E Scheuch, S Oswald, M Hasan, D Wegner, M Grube, M Venner, A Ullrich, W Siegmund
BACKGROUND: Standard treatment of foals with severe abscessing lung infection caused by Rhodococcus equi using rifampicin and a macrolide antibiotic can be compromised by extensive inhibition and/or induction of drug metabolising enzymes (e.g. CYP3A4) and transport proteins (e.g. P-glycoprotein), as has been shown for rifampicin and clarithromycin. The combination of rifampicin with the new, poorly metabolised gamithromycin, a long-acting analogue of azithromycin and tulathromycin with lower pharmacokinetic interaction potential, might be a suitable alternative...
December 14, 2017: Equine Veterinary Journal
https://www.readbyqxmd.com/read/29233013/biotechnological-potential-for-degradation-of-isoprene-a-review
#4
Navnita Srivastva, Abhishek Singh, Yashpal Bhardwaj, Suresh Kumar Dubey
Isoprene, the ubiquitous, highly emitted non-methane volatile hydrocarbon, affects atmospheric chemistry and human health, and this makes its removal from the contaminated environment imperative. Physicochemical degradation of isoprene is inefficient and generates secondary pollutants. Therefore, biodegradation can be considered as the safer approach for its efficient abatement. This review summarizes efforts in this regard that led to tracking the diverse groups of isoprene degrading bacteria such as Methanotrophs, Xanthobacter, Nocardia, Alcaligenes, Rhodococcus, Actinobacteria, Alphaproteobacteria, Bacteriodetes, Pseudomonas, and Alcanivorax...
December 12, 2017: Critical Reviews in Biotechnology
https://www.readbyqxmd.com/read/29231817/plasmid-powered-evolutionary-transitions
#5
Ryan A Melnyk, Cara H Haney
The acquisition of a virulence plasmid is sufficient to turn a beneficial strain of Rhodococcus bacteria into a pathogen.
December 12, 2017: ELife
https://www.readbyqxmd.com/read/29231813/evolutionary-transitions-between-beneficial-and-phytopathogenic-rhodococcus-challenge-disease-management
#6
Elizabeth A Savory, Skylar L Fuller, Alexandra J Weisberg, William J Thomas, Michael I Gordon, Danielle M Stevens, Allison L Creason, Michael S Belcher, Maryna Serdani, Michele S Wiseman, Niklaus J Grünwald, Melodie L Putnam, Jeff H Chang
Understanding how bacteria affect plant health is crucial for developing sustainable crop production systems. We coupled ecological sampling and genome sequencing to characterize the population genetic history of Rhodococcus and the distribution patterns of virulence plasmids in isolates from nurseries. Analysis of chromosome sequences shows that plants host multiple lineages of Rhodococcus, and suggested that these bacteria are transmitted due to independent introductions, reservoir populations, and point source outbreaks...
December 12, 2017: ELife
https://www.readbyqxmd.com/read/29230347/induction-of-reactive-intermediates-and-autophagy-related-proteins-upon-infection-of-macrophages-with-rhodococcus-equi
#7
Prashanth Chandramani-Shivalingappa, Mahesh Bhandari, Sarah A Wiechert, Jessica Gilbertie, Douglas E Jones, Brett A Sponseller
Rhodococcus equi (R. equi) is an intracellular macrophage-tropic pathogen with potential for causing fatal pyogranulomatous pneumonia in foals between 1 and 6 months of age. In this study, we sought to determine whether infection of macrophages with R. equi could lead to the induction of autophagy. Murine bone marrow derived macrophages (BMDM) were infected with R. equi for various time intervals and analyzed for upregulation of autophagy proteins and accumulation of autophagosomes relative to uninfected controls...
2017: Scientifica
https://www.readbyqxmd.com/read/29230202/development-of-a-novel-escherichia-coli-kocuria-shuttle-vector-using-the-cryptic-pkpal3-plasmid-from-k-palustris-ipufs-1-and-its-utilization-in-producing-enantiopure-s-styrene-oxide
#8
Hiroshi Toda, Nobuya Itoh
The novel cryptic pKPAL3 plasmid was isolated from the Gram-positive microorganism Kocuria palustris IPUFS-1 and characterized in detail. pKPAL3 is a circular plasmid that is 4,443 bp in length. Open reading frame (ORF) and homology search analyses indicated that pKPAL3 possesses four ORFs; however, there were no replication protein coding genes predicted in the plasmid. Instead, there were two nucleotide sequence regions that showed significant identities with untranslated regions of K. rhizophila DC2201 (NBRC 103217) genomic sequences, and these sequences were essential for autonomous replication of pKPAL3 in Kocuria cells...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29226632/novel-bovine-associated-pvapn-plasmid-type-in-rhodococcus-equi-identified-from-lymph-nodes-of-slaughtered-cattle-and-lungs-of-people-living-with-hiv-aids
#9
M G Ribeiro, G H B Lara, P da Silva, M M J Franco, A L de Mattos-Guaraldi, A P C de Vargas, R I Sakate, F R Pavan, B S Colhado, F V R Portilho, R G Motta, T Kakuda, S Takai
Rhodococcus equi is a well-recognized Gram-positive intracellular facultative bacterium that is opportunistic in nature, which causes pyogranulomatous infections in humans and multiple host animals. The pathogenicity of the microorganism has been attributed to the presence of plasmid-encoded virulence-associated proteins (Vap). To date, three host-associated virulence plasmid types of R. equi have been identified as follows: the circular pVAPA and pVAPB, related, respectively, to equine and porcine isolates, and a recently described linear pVAPN plasmid associated with bovine strains, although these three types are found in human isolates...
December 10, 2017: Transboundary and Emerging Diseases
https://www.readbyqxmd.com/read/29217789/genome-sequences-of-19-rhodococcus-erythropolis-cluster-ca-phages
#10
J Alfred Bonilla, Sharon Isern, Ann M Findley, Karen K Klyczek, Scott F Michael, Margaret S Saha, William J Buchser, Mark H Forsyth, Sudip Paudel, Christopher R Gissendanner, Allison M D Wiedemeier, Fernanda L Alonzo, Rebecca A Garlena, Daniel A Russell, Welkin H Pope, Steven G Cresawn, Deborah Jacobs-Sera, Graham F Hatfull
We report the complete genome sequences of 19 cluster CA bacteriophages isolated from environmental samples using Rhodococcus erythropolis as a host. All of the phages are Siphoviridae, have similar genome lengths (46,314 to 46,985 bp) and G+C contents (58.5 to 58.8%), and share nucleotide sequence similarity.
December 7, 2017: Genome Announcements
https://www.readbyqxmd.com/read/29216488/microbial-community-composition-and-pahs-removal-potential-of-indigenous-bacteria-in-oil-contaminated-sediment-of-taean-coast-korea
#11
Dong Wan Lee, Hanbyul Lee, Aslan Hwanhwi Lee, Bong-Oh Kwon, Jong Seong Khim, Un Hyuk Yim, Beom Seok Kim, Jae-Jin Kim
The tidal flats near Sinduri beach in Taean, Korea, have been severely contaminated by heavy crude oils due to the Korea's worst oil spill accident, say the Hebei Spirit Oil Spill, in 2007. Crude oil compounds, including polycyclic aromatic hydrocarbons (PAHs), pose significant environmental damages due to their wide distribution, persistence, high toxicity, mutagenicity, and carcinogenicity. Microbial community of Sinduri beach sediments samples was analyzed by metagenomic data with 16S rRNA gene amplicons...
December 4, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29210281/characterization-of-the-rhodococcus-sp-mk1-strain-and-its-pilot-application-for-bioremediation-of-diesel-oil-contaminated-soil
#12
Ágnes Erdeiné Kis, Krisztián Laczi, Szilvia Zsíros, Péter Kós, Roland Tengölics, Naila Bounedjoum, Tamás Kovács, Gábor Rákhely, Katalin Perei
Petroleum hydrocarbons and derivatives are widespread contaminants in both aquifers and soil, their elimination is in the primary focus of environmental studies. Microorganisms are key components in biological removal of pollutants. Strains capable to utilize hydrocarbons usually appear at the contaminated sites, but their metabolic activities are often restricted by the lack of nutrients and/or they can only utilize one or two components of a mixture. We isolated a novel Rhodococcus sp. MK1 strain capable to degrade the components of diesel oil simultaneously...
December 6, 2017: Acta Microbiologica et Immunologica Hungarica
https://www.readbyqxmd.com/read/29209303/ph-stress-induced-cooperation-between-rhodococcus-ruber-yyl-and-bacillus-cereus-mly1-in-biodegradation-of-tetrahydrofuran
#13
Zubi Liu, Zhixing He, Hui Huang, Xuebin Ran, Adebanjo O Oluwafunmilayo, Zhenmei Lu
Microbial consortia consisting of cooperational strains exhibit biodegradation performance superior to that of single microbial strains and improved remediation efficiency by relieving the environmental stress. Tetrahydrofuran (THF), a universal solvent widely used in chemical and pharmaceutical synthesis, significantly affects the environment. As a refractory pollutant, THF can be degraded by some microbial strains under suitable conditions. There are often a variety of stresses, especially pH stress, that inhibit the THF-degradation efficiency of microbial consortia...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29205554/vapa-of-rhodococcus-equi-binds-phosphatidic-acid
#14
Lindsay M Wright, Emily M Carpinone, Terry L Bennett, Mary K Hondalus, Vincent J Starai
Rhodococcus equi is a multi-host, facultative intracellular bacterial pathogen that primarily causes pneumonia in foals less than six months in age and immunocompromised people. Previous studies determined that the major virulence determinant of R. equi is the surface bound virulence associated protein A (VapA). The presence of VapA inhibits the maturation of R. equi-containing phagosomes and promotes intracellular bacterial survival, as determined by the inability of vapA deletion mutants to replicate in host macrophages...
December 4, 2017: Molecular Microbiology
https://www.readbyqxmd.com/read/29192510/aflatoxin-b1-detoxification-by-cell-free%C3%A2-extracts-of-rhodococcus-strains
#15
Anita Risa, Dalma Maja Divinyi, Erzsébet Baka, Csilla Krifaton
Aflatoxin B1 (AFB1) produced by Aspergillus molds is a genotoxic and carcinogenic mycotoxin. For the elimination of mycotoxins from food and feed, biodetoxification can be a successful tool. The aim of this study was to reveal biodetoxification with the cell-free extracts of Rhodococcus erythropolis NI1 and Rhodococcus rhodochrous NI2, which have been already proved to detoxify AFB1. Extracellular matrices of cultures and also intracellular extracts were applied for detoxification. In both cases, media containing constitutively produced and AFB1-induced enzymes were tested, respectively...
December 1, 2017: Acta Microbiologica et Immunologica Hungarica
https://www.readbyqxmd.com/read/29174512/biosynthesis-of-selenium-nanoparticles-and-nanorods-as-a-product-of-selenite-bioconversion-by-the-aerobic-bacterium-rhodococcus-aetherivorans-bcp1
#16
Alessandro Presentato, Elena Piacenza, Max Anikovskiy, Martina Cappelletti, Davide Zannoni, Raymond J Turner
The wide anthropogenic use of selenium compounds represents the major source of selenium pollution worldwide, causing environmental issues and health concerns. Microbe-based strategies for metal removal/recovery have received increasing interest thanks to the association of the microbial ability to detoxify toxic metal/metalloid polluted environments with the production of nanomaterials. This study investigates the tolerance and the bioconversion of selenite (SeO32-) by the aerobically grown Actinomycete Rhodococcus aetherivorans BCP1 in association with its ability to produce selenium nanoparticles and nanorods (SeNPs and SeNRs)...
November 21, 2017: New Biotechnology
https://www.readbyqxmd.com/read/29143212/rhodococcus-psychrotolerans-sp-nov-isolated-from-rhizosphere-of-deschampsia-antarctica
#17
Leonardo Jose Silva, Danilo Tosta Souza, Diego Bonaldo Genuario, Harold Alexander Vargas Hoyos, Suikinai Nobre Santos, Luiz Henrique Rosa, Tiago Domingues Zucchi, Itamar Soares Melo
A novel actinobacterium, designated strain CMAA 1533(T), was isolated from the rhizosphere of Deschampsia antarctica collected at King George Island, Antarctic Peninsula. Strain CMAA 1533(T) was found to grow over a wide range of temperatures (4-28 °C) and pH (4-10). Macroscopically, the colonies were observed to be circular shaped, smooth, brittle and opaque-cream on most of the culture media tested. Phylogenetic analysis based on 16S rRNA gene sequences revealed that strain CMAA 1533(T) belongs to the family Nocardiaceae and forms a distinct phyletic line within the genus Rhodococcus...
November 15, 2017: Antonie Van Leeuwenhoek
https://www.readbyqxmd.com/read/29141235/bioremediation-of-pcb-contaminated-shallow-river-sediments-the-efficacy-of-biodegradation-using-individual-bacterial-strains-and-their-consortia
#18
Hana Horváthová, Katarína Lászlová, Katarína Dercová
Elimination of dangerous toxic and hydrophobic chlorinated aromatic compounds, mainly PCBs from the environment, is one of the most important aims of the environmental biotechnologies. In this work, biodegradation of an industrial mixture of PCBs (Delor 103, equivalent to Aroclor 1242) was performed using bacterial consortia composed of four bacterial strains isolated from the historically PCB-contaminated sediments and characterized as Achromobacter xylosoxidans, Stenotrophomonas maltophilia, Ochrobactrum anthropi and Rhodococcus ruber...
November 3, 2017: Chemosphere
https://www.readbyqxmd.com/read/29138620/cutaneous-microflora-from-geographically-isolated-groups-of-bradysia-agrestis-an-insect-vector-of-diverse-plant-pathogens
#19
Jong Myong Park, Young-Hyun You, Jong-Han Park, Hyeong-Hwan Kim, Sa-Youl Ghim, Chang-Gi Back
Larvae of Bradysia agrestis, an insect vector that transports plant pathogens, were sampled from geographically isolated regions in Korea to identify their cutaneous fungal and bacterial flora. Sampled areas were chosen within the distribution range of B. agrestis; each site was more than 91 km apart to ensure geographical segregation. We isolated 76 microbial (fungi and bacteria) strains (site 1, 29; site 2, 29; site 3, 18 strains) that were identified on the basis of morphological differences. Species identification was molecularly confirmed by determination of universal fungal internal transcribed spacer and bacterial 16S rRNA gene sequences in comparison to sequences in the EzTaxon database and the NCBI GenBank database, and their phylogenetic relationships were determined...
September 2017: Mycobiology
https://www.readbyqxmd.com/read/29126065/bioconversion-of-alkaloids-to-high-value-chemicals-comparative-analysis-of-newly-isolated-lupanine-degrading-strains
#20
Stella Parmaki, Ioannis Vyrides, Marlen I Vasquez, Viki Hartman, Irene Zacharia, Ioanna Hadjiadamou, Catarina B M Barbeitos, Frederico C Ferreira, Carlos A M Afonso, Chrysoulla Drouza, Michalis Koutinas
This work explores the potential for development of a lupanine valorization process evaluating different isolated microorganisms for their capacity to metabolize the alkaloid. Ecotoxicological assessment demonstrated that lupanine is toxic for Vibrio fischeri and Daphnia magna exhibiting EC50 values of 89 mg L(-1) and 47 mg L(-1) respectively, while acting both as growth inhibitor for a monocotyledonous and as promoter for a dicotyledonous plant. Among the eight aerobic and anaerobic strains isolated and identified Rhodococcus rhodochrous LPK211 achieved 81% removal for 1...
October 30, 2017: Chemosphere
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