102,077 results match your criteria type strain

Torsional strain engineering of transition metal dichalcogenide nanotubes: An ab initio study.

Nanotechnology 2021 Aug 4. Epub 2021 Aug 4.

Georgia Institute of Technology, 790 Atlantic Dr, Atlanta, Georgia, 30332, UNITED STATES.

We study the effect of torsional deformations on the electronic properties of single-walled transition metal dichalcogenide (TMD) nanotubes. In particular, considering forty-five select armchair and zigzag TMD nanotubes, we perform symmetry-adapted Kohn-Sham density functional theory calculations to determine the variation in bandgap and effective mass of charge carriers with twist. We find that metallic nanotubes remain so even after deformation, whereas semiconducting nanotubes experience a decrease in bandgap with twist - originally direct bandgaps become indirect - resulting in semiconductor to metal transitions. Read More

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Whole Genome Sequencing of a Strain Isolated from the Hospital Environment: An Extremely Multiresistant NDM-1 and VIM-48 Coproducing Isolate.

Microb Drug Resist 2021 Aug 4. Epub 2021 Aug 4.

Laboratory of Microorganisms and Active Biomolecules, Department of Biology, Faculty of Sciences of Tunis, University of Tunis El Manar, Tunis, Tunisia.

has acquired resistance to several antimicrobial drugs, including last-resort antibiotics affecting, therefore, clinical efficacy and causing high rates of mortality. In this study, we investigate the whole genome sequence of a carbapenem-resistant strain isolated from the hospital environment in Tunisia. A total of 210 samples were taken using sterile swabs, from inanimate surfaces, medical devices, and care staff, during the period extended between March and April 2019. Read More

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Pertactin contributes to shedding and transmission of Bordetella bronchiseptica.

PLoS Pathog 2021 Aug 4;17(8):e1009735. Epub 2021 Aug 4.

Department of Infectious Diseases, College of Veterinary Medicine, University of Georgia, Athens, Georgia, United States of America.

Whooping cough is resurging in the United States despite high vaccine coverage. The rapid rise of Bordetella pertussis isolates lacking pertactin (PRN), a key vaccine antigen, has led to concerns about vaccine-driven evolution. Previous studies showed that pertactin can mediate binding to mammalian cells in vitro and act as an immunomodulatory factor in resisting neutrophil-mediated clearance. Read More

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Glutathione synthetase overexpression in improves halotolerance of iron oxidation.

Appl Environ Microbiol 2021 Aug 4:AEM0151821. Epub 2021 Aug 4.

Department of Chemical Engineering, Columbia University, New York, NY, USA.

are well-studied iron- and sulfur-oxidizing acidophilic chemolithoautotrophs that are exploited for their ability to participate in the bioleaching of metal sulfides. Here, we overexpressed the endogenous glutamate-cysteine ligase and glutathione synthetase genes in separate strains and found that glutathione synthetase overexpression increased intracellular glutathione levels. We explored the impact of pH on the halotolerance of iron oxidation in wild type and engineered cultures. Read More

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High-efficiency genome editing based on endogenous CRISPR-Cas system enhances cell growth and lactic acid production in .

Appl Environ Microbiol 2021 Aug 4:AEM0094821. Epub 2021 Aug 4.

State Key Laboratory of Agricultural Microbiology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan, 430070, Hubei, P.R. China.

is commonly used for pediocin production and lactic acid fermentation. However, high-efficiency genome editing tool is unavailable for this species. In this study, we constructed the endogenous subtype II-A CRISPR-Cas system-based genome interference plasmids which carried a "Repeat-Spacer-Repeat" cassette in the pMG36e shuttle vector. Read More

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sp. nov., a facultative anaerobic bacterium isolated from mangrove sediment.

Int J Syst Evol Microbiol 2021 Aug;71(8)

State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory of Plant Resources and Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Life Sciences, Sun Yat-Sen University, Guangzhou, 510275, PR China.

Two Gram-stain-negative, motile, facultatively anaerobic, rod-shaped strains, FJAT-53720 and FJAT-53726, were isolated from rhizosphere sediment of plant . Phylogenetic analysis based on their 16S rRNA gene sequences revealed that strains FJAT-53720 and FJAT-53726 were affiliated to the genus (forming an independent cluster) with the highest sequence similarity to the type strain of . Optimum growth of both strains was observed at 30 °C and pH 7. Read More

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Virus-like vesicles based on SFV-containing rabies virus glycoprotein make a safe and efficacious rabies vaccine candidate in a mouse model.

J Virol 2021 Aug 4:JVI0079021. Epub 2021 Aug 4.

State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, China.

Rabies is a fatal zoonosis causing encephalitis in mammals, and vaccination is the most effective method to control and eliminate rabies. Virus-like vesicles (VLVs), which are characterized as infectious, self-propagating membrane-enveloped particles composed of only Semliki Forest virus (SFV) replicase and vesicular stomatitis virus glycoprotein (VSV-G), have been proven safe and efficient as vaccine candidates. However, previous studies showed that VLVs containing rabies virus glycoprotein (RABV-G) grew at relatively low titers in cells, impeding their potential use as a rabies vaccine. Read More

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Dual RNA-seq reveals the global transcriptome dynamics of Ralstonia solanacearum and pepper (Capsicum annuum) hypocotyls during bacterial wilt pathogenesis.

Phytopathology 2021 Aug 4. Epub 2021 Aug 4.

Beijing Vegetable Research Center, Beijing Academy of Agricultural and Forestry Sciences, Beijing 100097, China., Beijing, China;

Bacterial wilt, caused by Ralstonia solanacearum (Rso), is a serious disease in pepper. However, the interaction between the pathogen and pepper remains largely unknown. This study aimed to gain insights into determinants of pepper susceptibility and Rso pathogenesis. Read More

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Deletion of the Gene, Involved in the Cell Cycle, Affects Respiration and Pseudohyphal Differentiation in Saccharomyces cerevisiae.

Microbiol Spectr 2021 Aug 4:e0008821. Epub 2021 Aug 4.

National Engineering Research Center for Non-Food Biorefinery, Guangxi Academy of Sciences, Nanning, Guangxi, People's Republic of China.

Mbp1p is a component of MBF (MluI cell cycle box binding factor, Mbp1p-Swi6p) and is well known to regulate the G-S transition of the cell cycle. However, few studies have provided clues regarding its role in fermentation. This work aimed to recognize the function of the gene in ethanol fermentation in a wild-type industrial Saccharomyces cerevisiae strain. Read More

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macrolide resistance and molecular epidemiology in southern Africa, 2008-2018.

J Clin Microbiol 2021 Aug 4:JCM0238520. Epub 2021 Aug 4.

Centre for HIV and Sexually Transmitted Infections, National Institute for Communicable Diseases (NICD), National Health Laboratory Service (NHLS), Johannesburg, South Africa.

macrolide resistance and clinical treatment failure have emerged rapidly within communities where macrolides have been used as convenient, oral therapeutic alternatives to benzathine penicillin G for syphilis, or for other clinical indications. Macrolides are not included in the South African syndromic management guidelines for genital ulcer disease; however, in 2015, a 1 gram dose of azithromycin was incorporated into treatment algorithms for genital discharge. We determined the prevalence of 23S rRNA macrolide resistance-associated point mutations in 135 -positive surveillance specimens from Botswana, Zimbabwe and South Africa between 2008 and 2018. Read More

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Realize High Thermoelectric Properties in n-Type BiTeSe/YO Nanocomposites by Constructing Heterointerfaces.

ACS Appl Mater Interfaces 2021 Aug 4. Epub 2021 Aug 4.

College of Physics, Sichuan University, Chengdu 610065, China.

Due to the excellent thermoelectric performance, bismuth telluride (BiTe) compounds are highly promising for the thermoelectric conversion in the room temperature range. However, the inferior thermoelectric performance of the n-type leg severely restricts the applications of BiTe-based thermoelectric couples. Herein, n-type BiTeSe (BTS)-based thermoelectric materials incorporated with nanosized YO (0. Read More

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Ectobacillus aegiceratis sp. nov., a novel bacterium isolated from branch of Aegiceras corniculatum.

Antonie Van Leeuwenhoek 2021 Aug 3. Epub 2021 Aug 3.

Life Sciences Institute, Zunyi Medical University, Zunyi, 563006, People's Republic of China.

A Gram-stain-positive, non-motile, endospore-forming, rod-shaped and aerobic bacterium was isolated from surface-sterilized branch of Aegiceras corniculatum in Guangxi Zhuang Autonomous Region, China. The isolate, designated strain 165, grew at 20-45 °C (optimum, 30 °C), pH 6.0-7. Read More

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Chryseobacterium paridis sp. nov., an endophytic bacterial species isolated from the root of Paris polyphylla Smith var. yunnanensis.

Arch Microbiol 2021 Aug 3. Epub 2021 Aug 3.

Yunnan Institute of Microbiology, School of Life Sciences, Yunnan University, Kunming, 650091, People's Republic of China.

A Gram-negative, yellow-pigmented, rod-shaped bacterial strain YIM B02567 was isolated from the root of Paris polyphylla Smith var. yunnanensis in China. Strain YIM B02567 grew optimally at 25-30 °C and at pH 7. Read More

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Changing characteristics of S. aureus bacteremia caused by PVL-negative, MRSA strain over 11 years.

Sci Rep 2021 Aug 3;11(1):15677. Epub 2021 Aug 3.

Division of Infectious Diseases, Asan Medical Center, University of Ulsan College of Medicine, 88, Olympic-ro43-gil, Songpa-gu, Seoul, 05505, Republic of Korea.

Community-acquired methicillin-resistant Staphylococcus aureus (MRSA) has emerged as an important cause of infection. We conducted a longitudinal study to evaluate changes in clinical and microbiological characteristics as well as outcomes of sequence type (ST) 72 MRSA bacteremia. We reviewed adult patients enrolled in a prospective cohort with ST72 MRSA bacteremia from August 2008 to December 2018 at Asan Medical Center, Seoul, South Korea. Read More

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O-mannosyltransferase MaPmt2 contributes to stress tolerance, cell wall integrity and virulence in Metarhizium acridum.

J Invertebr Pathol 2021 Jul 31:107649. Epub 2021 Jul 31.

Genetic Engineering Research Center, School of Life Sciences, Chongqing University, Chongqing 401331, PR China; Chongqing Engineering Research Center for Fungal Insecticide, Chongqing 401331, PR China; Key Laboratory of Gene Function and Regulation Technologies under Chongqing Municipal Education Commission, Chongqing 401331, PR China. Electronic address:

As a conserved post-translational modification, O-mannosyltransferase families play important roles in many cellular processes. Three subfamilies (MaPmt1, MaPmt2 and MaPmt4) are grouped in Metarhizium acridum according to sequence homology. The functions of MaPmt1 and MaPmt4 have been characterized in M. Read More

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Mucosal immune responses in the trachea after chronic infection with Mycoplasma gallisepticum in unvaccinated and vaccinated mature chickens.

Cell Microbiol 2021 Aug 3:e13383. Epub 2021 Aug 3.

Asia-Pacific Centre for Animal Health, Melbourne Veterinary School, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Parkville, Victoria, Australia.

Tracheitis associated with the chronic respiratory disease in chickens caused by Mycoplasma gallisepticum is marked by infiltration of leukocytes into the mucosa. Although cytokines/chemokines are known to play a key role in recruitment, differentiation and proliferation of leukocytes, those that are produced and secreted into the trachea during the chronic stages of infection with M. gallisepticum have not been described previously. Read More

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sp. nov., isolated from cotton field soil.

Int J Syst Evol Microbiol 2021 Aug;71(8)

School of Food and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, PR China.

A Gram-negative bacterium, designated S1-65, was isolated from soil samples collected from a cotton field located in the Xinjiang region of PR China. Results of 16S rRNA gene sequence analysis revealed that strain S1-65 was affiliated to the genus with its closest phylogenetic relatives being '' 35Y (98.4 %), '' SA29-B (98. Read More

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sp. nov., a piezotolerant, hyperthermophilic archaeon isolated from a deep-sea hydrothermal vent chimney in the Southwest Indian Ridge.

Int J Syst Evol Microbiol 2021 Aug;71(8)

International Associated Laboratory of Evolution and Development of Magnetotactic Multicellular Organisms, CNRS-Marseille/ CAS- Sanya, PR China.

A hyperthermophilic, strictly anaerobic archaeon, designated strain SY113, was isolated from a deep-sea hydrothermal vent chimney on the Southwest Indian Ridge at a water depth of 2770 m. Enrichment and isolation of strain SY113 were performed at 85 °C at 0.1 MPa. Read More

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Hymenobacter puniceus sp. nov., radiation resistant bacteria isolated from soil in South Korea.

Antonie Van Leeuwenhoek 2021 Aug 3. Epub 2021 Aug 3.

Department of Bio & Environmental Technology, College of Natural Science, Seoul Women's University, Seoul, 139-774, South Korea.

Two novel Gram-negative bacterial strains BT190 and BT191 were isolated from soil collected in Uijeongbu city (37°44'55″N, 127°02'20″E), Korea. Phylogenetic analysis based on 16S rRNA gene sequences revealed that strains BT190 and BT191 belong to a distinct lineage within the genus Hymenobacter (family Hymenobacteraceae, order Cytophagales, class Cytophagia). The level of 16S rRNA gene sequence similarity between the strains BT190 and BT190 was 99. Read More

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A humanized version of Foxp2 affects ultrasonic vocalization in adult female and male mice.

Genes Brain Behav 2021 Aug 2. Epub 2021 Aug 2.

Max Planck Institute for Evolutionary Biology, Plön, Germany.

The transcription factor FoxP2 is involved in setting up the neuronal circuitry for vocal learning in mammals and birds and is thought to have played a special role in the evolution of human speech and language. It has been shown that an allele with a humanized version of the murine Foxp2 gene changes the ultrasonic vocalization of mouse pups compared to pups of the wild-type inbred strain. Here we tested if this humanized allele would also affect the ultrasonic vocalization of adult female and male mice. Read More

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Strain- and field-induced anisotropy in hybrid elastomers with elongated filler nanoparticles.

Soft Matter 2021 Aug 3. Epub 2021 Aug 3.

Chemistry Department, Universität zu Köln, 50939 Köln, Germany.

The implementation of anisotropy to functional materials is a key step towards future smart materials. In this work, we evaluate the influence of preorientation and sample architecture on the strain-induced anisotropy in hybrid elastomers containing covalently attached elongated magnetic filler particles. Accordingly, silica coated spindle-type hematite nanoparticles are incorporated into poly(dimethylsiloxane)-based elastomers, and two types of composite architectures are compared: on the one hand a conventional architecture of filled, covalently crosslinked elastomers, and on the other hybrid elastomers that are crosslinked exclusively by covalent attachment of the polymer chains to the particle surface. Read More

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First report of 'Candidatus Phytoplasma asteris' associated with witches'-broom disease of Macadamia ternifolia in China.

Plant Dis 2021 Aug 2. Epub 2021 Aug 2.

Southwest Forestry University, 12617, College of Biodiversity Conservation, Kunming, China;

Macadamia nut (Macadamia ternifolia) was first introduced into China from Australia in 1910, and the main cultivation areas were Yunnan and Guangxi. It can be used as both a fruit and a therapeutic drug, with high economic value. In March 2021, it was observed that the M. Read More

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Laser-assisted MicroPyramid patterned PDMS encapsulation of 1D tellurium nanowires on cellulose paper for highly sensitive strain sensor and its photodetection studies.

Nanotechnology 2021 Aug 2. Epub 2021 Aug 2.

Birla Institute of Technology and Science - Hyderabad Campus, Hyderabad, Hyderabad, 500078, INDIA.

This work demonstrates the fabrication of Tellurium-nanowires (Te-NWs)/paper based device encapsulated using laser assisted mircopyramid patterned polydimethylsiloxane (PDMS) films. Although there are multiple reports published on 1D Te, most of them are limited to establishing its properties and studying its behavior as a sensor and research on the utilization of Te-NWs for physical sensors remain unexplored. Further, reports on p-type photodetectors also remain scarce. Read More

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hns mRNA downregulates the expression of galU and attenuates the motility of Salmonella enterica serovar Typhi.

Int J Med Microbiol 2021 Jul 26;311(6):151525. Epub 2021 Jul 26.

Department of Biochemistry and Molecular Biology, School of Medicine, Jiangsu University, Zhenjiang, Jiangsu, 212013, China. Electronic address:

Recently, multiple bifunctional RNAs have been discovered, which can both be translated into proteins and play regulatory roles. hns encodes the global gene silencing factor H-NS, which is widespread in Gram-negative bacteria. This study reported that hns mRNA of Salmonella enterica serovar Typhi (S. Read More

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Evaluation of chickens infected with a recombinant virulent NDV clone expressing chicken IL4.

Microb Pathog 2021 Jul 30:105116. Epub 2021 Jul 30.

Department of Pathology, College of Veterinary Medicine, The University of Georgia, Athens, GA, 30602-7388, United States.

Background: There is evidence that chicken IL4 (chIL4) functions similarly to its mammalian analogue by enhancing type 2 T helper (Th2) humoral immunity and promoting protection against parasitic infections; however, no studies have been performed to assess the effect of chIL4 on the pathogenesis of Newcastle disease (ND). To assess the role of chIL4 in velogenic NDV pathogenesis we created a vNDV infectious clone expressing chIL4. We hypothesized that co-expression of chIL4 during virus replication would result in decreased inflammation caused by the Th1 response and thereby increasing survival to challenge with vNDV. Read More

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A monoclonal antibody neutralizes pesudorabies virus by blocking gD binding to the receptor nectin-1.

Int J Biol Macromol 2021 Jul 30. Epub 2021 Jul 30.

Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, China; School of Life Sciences, Zhengzhou University, Zhengzhou, China; College of Veterinary Medicine, Northwest A&F University, Yangling, China; Henan Zhongze Biological Engineering Co., Ltd, Zhengzhou, China; College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou, China; Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonose, Yangzhou University, Yangzhou, China. Electronic address:

Pseudorabies virus (PRV) was isolated from some human cases recently and the infected patients manifested respiratory dysfunction and acute neurological symptoms. However, no effective drug or vaccine, preventing the progression of PRV infection, is available. Nectin-1 was the only reported receptor for PRV cell entry both swine and human origin, representing an excellent target to block PRV infection, and especially its transmission from pigs to humans. Read More

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Development of an experimental inactivated vaccine from Vero cell adapted Enterovirus D68.

Virus Res 2021 Jul 30:198528. Epub 2021 Jul 30.

Bharat Biotech International Ltd, Hyderabad 500078, India.

Enterovirus D68 is an emerging respiratory disease pathogen causing multiple outbreaks worldwide. Enterovirus D68 strain US/KY/14-18953 was adapted to propagate in Vero cells resulting alteration of seven amino acids. The Vero cell adapted virus was inactivated with Formalin and immunized in mice. Read More

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Integration of RNA-seq and RNAi reveals the contribution of znuA gene to the pathogenicity of Pseudomonas plecoglossicida and to the immune response of Epinephelus coioides.

J Fish Dis 2021 Aug 2. Epub 2021 Aug 2.

Fisheries College, Jimei University, Xiamen, China.

Pseudomonas plecoglossicida is an important pathogen in aquaculture and causes serious economic losses. Our previous study indicated that znuA gene might play an important role in the pathogenicity of P. plecoglossicida. Read More

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Schumannella soli sp. nov., a novel actinomycete isolated from mangrove soil by in situ cultivation.

Antonie Van Leeuwenhoek 2021 Aug 2. Epub 2021 Aug 2.

Beijing Key Laboratory of Antimicrobial Agents, Department of Microbial Chemistry, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100050, China.

A novel actinobacterial strain, designated 10F1D-1, was isolated from soil sample collected from Futian mangrove nature reserve, China using of the in situ cultivation technique. Preliminary analysis based on the 16S rRNA gene sequence revealed that strain 10F1D-1 was the member of genus Schumannella with sharing highest sequence similarity (99.7%) to Schumannella luteola DSM 23141. Read More

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Transcript pattern analysis of Arf-family genes in the phytopathogen Fusarium oxysporum f. sp. lycopersici reveals the role of Arl3 in the virulence.

Antonie Van Leeuwenhoek 2021 Aug 2. Epub 2021 Aug 2.

Laboratorio de Diferenciación Celular, Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Ciudad Universitaria, 58038, Morelia, Michoacán, Mexico.

Fusarium oxysporum f. sp. lycopersici is an important plant pathogen that has been used to understand the virulence mechanisms that soil inhabiting fungi exhibit during the infection process. Read More

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