3,174 results match your criteria aureus atcc


Synthesis, Crystal Structure, and Antibacterial Properties of Silver-Functionalized Low-Dimensional Layered Zirconium Phosphonates.

Inorg Chem 2022 Jan 19. Epub 2022 Jan 19.

Department of Pharmaceutical Sciences, University of Perugia, Via del Liceo, 1, 06123 Perugia, Italy.

New insoluble layered zirconium phosphate carboxyaminophosphonates (ZPs), with the general formula Zr(PO)H[(OPCH)N(CH)COO]·HO ( = 3, 4, and 5), have been prepared and characterized. The crystal structure for = 3 and 4 samples was determined from X-ray powder diffraction data. The structure for = 3 was monoclinic in space group 2/ with the following unit cell parameters: = 34. Read More

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January 2022

A study of various factors affecting satellitism tests of Haemophilus influenzae and Haemophilus parainfluenzae using Staphylococcus aureus as the source of NAD.

J Microbiol Methods 2022 Jan 13;193:106417. Epub 2022 Jan 13.

R&D Center, Autobio Diagnostics Co., Ltd, Zhengzhou, Henan, China. Electronic address:

Many factors affecting satellitism tests are unclear, and it is difficult to avoid misidentification, even if the medium is properly selected. We investigated the factors causing false-positive results for Haemophilus influenzae and false-negative results for Haemophilus parainfluenzae in the satellitism tests using Staphylococcus aureus as the source of nicotinamide adenine dinucleotide (NAD). H. Read More

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January 2022

Heterogeneous vancomycin resistance in Staphylococcus aureus does not predict development of vancomycin resistance upon vancomycin pressure.

J Antimicrob Chemother 2022 Jan 11. Epub 2022 Jan 11.

Centre National de Référence des Staphylocoques, Hospices Civils de Lyon, Lyon, France.

Background: It is unclear whether Staphylococcus aureus with heterogeneous intermediate vancomycin resistance (hVISA) can develop vancomycin resistance faster than vancomycin-susceptible S. aureus (VSSA) strains.

Methods: We compared the kinetics of vancomycin MIC increase for 15 days of sustained in vitro vancomycin exposure for clinical hVISA (n = 12) and VSSA (n = 24) isolates, as well as for reference strains Mu3 (hVISA) and ATCC 29213 (VSSA). Read More

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January 2022

Hackflex: low-cost, high-throughput, Illumina Nextera Flex library construction.

Microb Genom 2022 Jan;8(1)

iThree Institute, University of Technology Sydney, Sydney, NSW, Australia.

We developed a low-cost method for the production of Illumina-compatible sequencing libraries that allows up to 14 times more libraries for high-throughput Illumina sequencing to be generated for the same cost. We call this new method Hackflex. The quality of library preparation was tested by constructing libraries from MG1655 genomic DNA using either Hackflex, standard Nextera Flex (recently renamed as Illumina DNA Prep) or a variation of standard Nextera Flex in which the bead-linked transposase is diluted prior to use. Read More

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January 2022

Antibacterial Activity of Clay Soils against Food-Borne and .

Molecules 2021 Dec 28;27(1). Epub 2021 Dec 28.

Department of Biosciences, Durham University, Durham DH1 3LE, UK.

Natural clays have recently been proven to possess antibacterial properties. Effective natural antimicrobial agents are needed to combat bacterial contamination on food contact surfaces, which are increasingly more prevalent in the food chain. This study sought to determine the antibacterial activity of clays against the food-borne pathogens ATCC 14028 and ATCC 13565. Read More

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December 2021

Phytochemical Profile, Antimicrobial, Cytotoxic, and Antioxidant Activities of Fresh and Air-Dried Essential Oils.

Molecules 2021 Dec 26;27(1). Epub 2021 Dec 26.

Department of Pharmacy, Faculty of Medicine and Health Sciences, An-Najah National University, Nablus P6028820, Palestine.

(Danin and Hedge) Bräuchler is a perennial herb in the Lamiaceae family that was discovered and classified in 1998. This green herb is restricted to the mountains overlooking the Dead Sea, specifically in Jordan's southwest, the Edom mountains, and the Tubas mountains in Palestine. Gas chromatography-mass spectrometry (GC-MS) analysis of essential oil (EO) of air-dried and fresh resulted in the identification of 30 and 42 phytochemicals accounting for 99. Read More

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December 2021

Antibacterial activity and mechanism of action of trigonostemone against Staphylococcus aureus and Bacillus cereus.

Trop Biomed 2021 Dec;38(4):484-490

Department of Chemistry, Faculty of Science, Mahasarakham University and Center of Excellence for Innovation in Chemistry, Kham riang, Kantarawichai, Maha Sarakham, 44150, Thailand.

In our present study, the hexane fraction from the root of the Thai medicinal plant Strophioblachia fimbricalyx Boerl. was purified and the purification led to the isolation of 3-acetylaleuritolic acid, trigonostemone and 3,6,9-trimethoxyphenanthropolone. The aims of this work are to evaluate antibacterial activity of these three isolated compounds from our local plant and to study their mechanism of actions toward target pathogenic bacteria (Gram positive and Gram negative bacteria). Read More

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December 2021

Characterization and validation of an alternative reference bacterium Korean Pharmacopoeia Staphylococcus aureus strain.

J Microbiol 2022 Jan 7. Epub 2022 Jan 7.

Division of Pathogen Resource Management, Center for Public Vaccine Development Support, National Institute of Infectious Diseases, National Institute of Health (NIH), Korea Disease Control and Prevention Agency, Cheongju, 28160, Republic of Korea.

The National Culture Collection of Pathogens (NCCP) is a microbial resource bank in Korea that collects pathogen resources causing infectious disease in human and distributes them for research and education. The NCCP bank attempts to discover strains with various characteristics and specific purposes to provide diverse resources to researchers. Staphylococcus aureus American Type Culture Collection (ATCC) 6538P is used as a reference strain in the microbial assay for antibiotics in the Korean and in the United States Pharmacopoeias. Read More

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January 2022

Sub-growth-inhibitory concentrations of omadacycline inhibit haemolytic activity .

JAC Antimicrob Resist 2022 Mar 22;4(1):dlab190. Epub 2021 Dec 22.

Paratek Pharmaceuticals, Inc., 1000 First Ave, Suite 200, King of Prussia, PA 19406, USA.

Objectives: To evaluate the effect of sub-growth-inhibitory concentrations of omadacycline on ATCC 10832 haemolytic activity .

Methods: Following determination of the MICs of omadacycline and comparator antibiotics, the strain was grown in the presence of individual antibiotics and the percentage of haemolysis assayed; 'washout' experiments were performed with omadacycline only.

Results: Omadacycline inhibited haemolytic activity at sub-growth-inhibitory concentrations. Read More

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Identification of Antimicrobial Peptides Isolated From the Skin Mucus of African Catfish, (Burchell, 1822).

Front Microbiol 2021 20;12:794631. Epub 2021 Dec 20.

Pharm-Biotechnology and Traditional Medicine Centre, Mbarara University of Science and Technology, Mbarara, Uganda.

Antimicrobial peptides (AMPs) constitute a broad range of bioactive compounds in diverse organisms, including fish. They are effector molecules for the innate immune response, against pathogens, tissue damage and infections. Still, AMPs from African Catfish, , skin mucus are largely unexplored despite their possible therapeutic role in combating antimicrobial resistance. Read More

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December 2021

Efficacy of various decontamination methods and sterilization on contaminated and inoculated diamond-coated burs.

Gen Dent 2022 Jan-Feb;70(1):56-60

The objective of this study was to evaluate the efficacy of various decontamination methods and subsequent sterilization on contaminated and inoculated diamond-coated burs. One hundred forty new diamond-coated burs and 120 extracted human molars were utilized in this study. The burs were divided into 7 groups (n = 20): 1, positive control; 2, negative control; 3, new, unused burs; and 4 to 7, burs subjected to various combinations of cleaning methods (manual cleaning, use of a cleaning stone, and/or ultrasonic cleaning) after contamination. Read More

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January 2022

Activity of Moxifloxacin Against Biofilms Formed by Clinical Isolates of Differing by Their Resistant or Persister Character to Fluoroquinolones.

Front Microbiol 2021 15;12:785573. Epub 2021 Dec 15.

Pharmacologie cellulaire et moléculaire, Louvain Drug Research Institute, Université catholique de Louvain, Brussels, Belgium.

biofilms are poorly responsive to antibiotics. Underlying reasons include a matrix effect preventing drug access to embedded bacteria, or the presence of dormant bacteria with reduced growth rate. Using 18 clinical isolates previously characterized for their moxifloxacin-resistant and moxifloxacin-persister character in stationary-phase culture, we studied their biofilm production and matrix composition and the anti-biofilm activity of moxifloxacin. Read More

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December 2021

Adaptation and validation of a method for evaluating the bactericidal activity of ethyl alcohol in gel format 70% (w/w).

J Microbiol Methods 2021 Dec 30;193:106402. Epub 2021 Dec 30.

Departamento de Microbiologia, Instituto Nacional de Controle de Qualidade em Saúde, Fundação Oswaldo Cruz, Av Brasil 4365, 21040-900, Rio de Janeiro, Brazil.

Ethyl alcohol 70% (w/w) is a broad-spectrum bactericidal agent that is mandatorily marketed as a gel in Brazil since 2002. However, there is no method described for the microbiological quality control of surface disinfectants in the form of gel, which makes it impossible to monitor the effectiveness of these products by the Health Surveillance. Thus, the present study aimed to adapt an analytical method and validate it so that it is possible to evaluate the bactericidal activity of ethyl alcohol-based disinfectants at 70% (w/w) in gel form. Read More

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December 2021

Antimicrobial activity of bacteriocin produced by a new Latilactobacillus curvatus sp.LAB-3H isolated from traditional yogurt.

Arch Microbiol 2021 Dec 29;204(1):101. Epub 2021 Dec 29.

Department of Microbiology, Faculty of Basic Sciences, Lahijan Branch, Islamic Azad University, P.O. Box 1616, Lahijan, Iran.

In recent years, the use of bacteriocin-producing Lactobacillus species has received much attention in different areas, including using as probiotics, food preservation, and as broad antimicrobial spectrum activity. In this study, a bacteriocin-producing Lactobacillus strain was isolated from traditional yogurt. The isolate was identified by morphological, biochemical, 16S rRNA analyses, and designated as Latilactobacillus curvatus LAB-3H. Read More

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December 2021

Development of novel indolin-2-one derivative incorporating thiazole moiety as DHFR and quorum sensing inhibitors: Synthesis, antimicrobial, and antibiofilm activities with molecular modelling study.

Bioorg Chem 2021 Dec 21;119:105571. Epub 2021 Dec 21.

Department of Chemistry, Faculty of Science, Al-Azhar University, 11884 Nasr City, Cairo, Egypt. Electronic address:

Nowadays, it's imperative to develop novel antimicrobial agents active against both drug-sensitive and drug-resistant bacterial infections with favorable profiles as high efficacy, low toxicity, and short therapy duration. Accordingly, a series of new thiazolo-indolin-2-one derivatives were synthesized based on acid and base catalyzed condensation or reaction of thiosemicarbazone 8 with different electrophilic reagents. The structure of the new compounds was confirmed based on elemental analysis and spectral data. Read More

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December 2021

Comparative Study of Antimicrobial, Anti-Inflammatory, and Antioxidant Activities of Different Parts from l'Her. Ex. DC (Fabaceae).

Evid Based Complement Alternat Med 2021 17;2021:8938534. Epub 2021 Dec 17.

Center for Research and Training on Medicinal Plants (CERFOPLAM), University of Lomé-Togo, BP 1515, Lomé, Togo.

Aims: is used in Beninese folk medicine for treatment of gastroenteritis. This study aims to compare the antimicrobial, antioxidant, and anti-inflammatory activity of the hydroalcoholic extracts of the leaves, trunk bark, and root.

Materials And Methods: The antimicrobial activity was evaluated by the broth microdilution method on 06 bacterial strains including 03 wild-type strains ( 0157H, sp. Read More

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December 2021

β-Glucan from mushrooms and dates as a wall material for targeted delivery of model bioactive compound: Nutraceutical profiling and bioavailability.

Ultrason Sonochem 2021 Dec 20;82:105884. Epub 2021 Dec 20.

Department of Food Science and Technology, University of Kashmir. Srinagar 190006, India.

Rutin was nano-encapsulated in date [En-Ru(D)] and mushroom [En-Ru(M)] β-glucan matrix to protect it from the harsh gastrointestinal environment and to enhance its bioavailability and biological activity upon digestion. The encapsulation was carried using green technology i.e. Read More

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December 2021

Comparison of Phytochemical Contents, Antioxidant and Antibacterial Activities of Various Solvent Extracts Obtained from 'Maluma' Avocado Pulp Powder.

Molecules 2021 Dec 20;26(24). Epub 2021 Dec 20.

Faculty of Environmental and Food Engineering, Nguyen Tat Thanh University, Ho Chi Minh City 754000, Vietnam.

Although avocado is a superfood rich in phytochemicals with high antioxidant activities, studies on the antibacterial properties of its pulp are limited, except for seed and peel portions. In this study, three types of solvent (acetone, methanol, and diethyl ether) were used to obtain the extracts from "Maluma" avocado pulp powder prepared by infrared drying. The extracts were analyzed for total polyphenols, phytopigments (total chlorophylls and carotenoids), antioxidant activities (ferric-reducing antioxidant power (FRAP), 2,2-Diphenyl-1-picrylhydrazyl (DPPH), and 2,2-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid (ABTS) assays), and antibacterial activities against seven pathogens ( ATCC 9290, ATCC 8739, ATCC 6539, ATCC 17802, ATCC 25933, ATCC 6538, and ATCC 11778). Read More

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December 2021

Assessment of the Antibacterial Efficacy of Halicin against Pathogenic Bacteria.

Antibiotics (Basel) 2021 Dec 2;10(12). Epub 2021 Dec 2.

National Center of Biotechnology, Life Science and Environment Research Institute, King Abdulaziz City for Science and Technology (KACST), P.O. Box 6086, Riyadh 11442, Saudi Arabia.

Artificial intelligence (AI) is a new technology that has been employed to screen and discover new drugs. Using AI, an anti-diabetic treatment (Halicin) was nominated and proven to have a unique antibacterial activity against several harmful bacterial strains, including multidrug-resistant bacteria. This study aims to explore the antibacterial effect of halicin and microbial susceptibility using the zone of inhibition and the minimum inhibition concentration (MIC) values while assessing the stability of stored halicin over a period of time with cost-effective and straightforward methods. Read More

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December 2021

Effect of Essential Oils on Growth Inhibition, Biofilm Formation and Membrane Integrity of and .

Antibiotics (Basel) 2021 Nov 30;10(12). Epub 2021 Nov 30.

Grupo de Investigación en Bioquímica y Microbiología (GIBIM), Escuela de Microbiología, Facultad de Salud, Universidad Industrial de Santander, Bucaramanga 680002, Colombia.

Biofilm as a cellular conformation confers survival properties to microbial populations and favors microbial resistance. Here, we investigated the antimicrobial, antibiofilm, antimotility, antihemolytic activity, and the interaction with synthetic membranes of 15 essential oils (EOs) on ATCC 25922 and ATCC 29213. Antimicrobial activity of EOs was determined through microdilution method; development of the biofilm was assessed using the crystal violet assay and SEM microscopy. Read More

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November 2021

Effect of ZnO on Properties of Gels for Heritage Objects Conservation.

Gels 2021 Dec 7;7(4). Epub 2021 Dec 7.

Institute of Biology Bucharest of Romanian Academy-IBB, 296 Splaiul Independenţei, P.O. Box 56-53, 060031 Bucharest, Romania.

One of the current research objectives is the development of new films for the conservation of glass heritage objects. The value of historical glass objects is given by the technology and raw materials used in production as well as their transparency and color. Their colors are correlated with oxide composition rich in transitional metals, which decrease resistance of corrosive agents from the atmosphere. Read More

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December 2021

Identification of components in Kazakhstan honeys that correlate with antimicrobial activity against wound and skin infecting microorganisms.

BMC Complement Med Ther 2021 Dec 20;21(1):300. Epub 2021 Dec 20.

Plant Biochemistry and Food Quality Group, Environmental and Biochemical Sciences Department, The James Hutton Institute, Invergowrie, Dundee, Scotland, UK.

Background: Antimicrobial drug resistance is a major public health threat that can render infections including wound and skin infections untreatable. The discovery of new antimicrobials is critical. Approaches to discover novel antimicrobial therapies have included investigating the antimicrobial activity of natural sources such as honey. Read More

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December 2021

Potential Fluorinated Anti-MRSA thiazolidinone derivatives with antibacterial, antitubercular activity and molecular docking studies.

Chem Biodivers 2021 Dec 20. Epub 2021 Dec 20.

Kasturba Medical College Mangalore, Microbiology, Mangalore, Mangalore, INDIA.

MRSA infection is one of the alarming diseases in the current scenario. Identifying newer molecules to treat MRSA infection is of urgent need. In the present study, we have designed fluorinated thiazolidinone derivatives with various aryl/heteroaryl units at 5 th position of the thiazolidinone core as promising anti-MRSA agents. Read More

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December 2021

Green synthesis of silver nanoparticles using sodium alginate and tannic acid: characterization and anti-S. aureus activity.

Int J Biol Macromol 2022 Jan 14;195:515-522. Epub 2021 Dec 14.

Beijing Laboratory for Food Quality and Safety, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China. Electronic address:

Multi-drug resistance and biofilm formation are a growing problem in the treatment of Staphylococcus aureus contamination. Advances in nanotechnology allow the synthesis of metal nanoparticles that can be assembled into complex architectures for controlling bacterial growth. This study aims to investigate the ultrasonic-assisted green synthesis of silver nanoparticles (AgNPs) by tannic acid (TA) and sodium alginate (Na-Alg) as the reducing and stabilizing agents, respectively, and evaluation of their antibacterial and antibiofilm activities. Read More

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January 2022

Development of an In-House Rapid Antimicrobial Susceptibility Testing Protocol for Positive Blood Culture and Its Implementation in Routine Microbiology Laboratories.

Front Microbiol 2021 30;12:765757. Epub 2021 Nov 30.

Department of Clinical Microbiology, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China.

Bloodstream infections (BSI) are associated with high morbidity and mortality and remain a leading cause of death. Blood culture (BC) including the identification and the antimicrobial susceptibility testing of the causative microorganisms should be performed as soon as possible. In this study, we developed an in-house rapid antimicrobial susceptibility testing (rAST) protocol for positive BC. Read More

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November 2021

Combined Application of MMT K10 Supported Copper Oxide Nanoparticles for Complete Removal of Cr(VI) from Aqueous Solution and Their Antibacterial Potential.

Acta Chim Slov 2021 Sep;68(3):617-628

Montmorillonite K10 (MMT K10) supported copper oxide nanoparticles (CuONPs) were synthesized by incorporating CuONPs onto the surface of MMT K10 by reducing the metal precursor with the help of hydrazine hydrate. Effects of various factors on the efficiency of composite to remove hexavalent chromium were studied to find out the optimum conditions for maximum removal. Under optimum conditions 15 mg of the synthesized nanocomposite was found capable to almost completely remove (99. Read More

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September 2021

The effect of Staphylococcus aureus exposure on white-tailed deer trabecular bone stiffness and yield.

J Mech Behav Biomed Mater 2022 Feb 2;126:105000. Epub 2021 Dec 2.

Department of Biology, Winthrop University, Rock Hill, SC, 29733, USA.

With a growing number of osteomyelitis diagnoses, many of which are linked to Staphylococcus aureus (S. aureus), it is imperative to understand the pathology of S. aureus in relation to bone to provide better diagnostics and patient care. Read More

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February 2022

Towards Property Profiling: SYNTHESIS and SAR Probing of New Tetracyclic Diazaphenothiazine Analogues.

Int J Mol Sci 2021 Nov 26;22(23). Epub 2021 Nov 26.

Department of Organic Chemistry, Faculty of Pharmaceutical Sciences in Sosnowiec, Medical University of Silesia in Katowice, Jagiellońska 4, 41-200 Sosnowiec, Poland.

A series of new tertiary phenothiazine derivatives containing a quinoline and a pyridine fragment was synthesized by the reaction of 1-methyl-3-benzoylthio-4-butylthioquinolinium chloride with 3-aminopyridine derivatives bearing various substituents on the pyridine ring. The direction and mechanism of the cyclization reaction of intermediates with the structure of 1-methyl-4-(3-pyridyl)aminoquinolinium-3-thiolate was related to the substituents in the 2- and 4-pyridine position. The structures of the compounds were analyzed using H, C NMR (COSY, HSQC, HMBC) and X-ray analysis, respectively. Read More

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November 2021

Evaluation of Geum urbanum L. Extracts with Respect to Their Antimicrobial Potential.

Chem Biodivers 2021 Dec 9:e202100850. Epub 2021 Dec 9.

Department of Analytical Development & Research, Section Phytochemical Research, WALA Heilmittel GmbH, Dorfstr. 1, DE, 73087 Bad Boll/Eckwälden, Germany.

Preparations derived from roots and rhizomes of Geum urbanum L. are traditionally used for the treatment of ulcers and irritations of mucous membranes of the mouth, stomach, and intestinal tract. In complementary medicine, fermentation is one of the methods applied to recover plant extracts used for the production of such pharmaceutical preparations. Read More

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December 2021

Effects of Antibacterial Peptide F1 on Bacterial Liposome Membrane Integrity.

Front Nutr 2021 12;8:768890. Epub 2021 Nov 12.

College of Food Science, South China Agricultural University, Guangzhou, China.

Previous studies from our lab have shown that the antimicrobial peptide F1 obtained from the milk fermentation by FX-6 derived from Tibetan kefir was different from common antimicrobial peptides; specifically, F1 simultaneously inhibited the growth of Gram-negative and Gram-positive bacteria. Here, we present follow-on work demonstrating that after the antimicrobial peptide F1 acts on either ATCC 25922 () or ATCC 63589 (), their respective bacterial membranes were severely deformed. This deformation allowed leakage of potassium and magnesium ions from the bacterial membrane. Read More

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November 2021