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Infectious Disease: Gastroenteritis

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Molecules, Vol. 27, Pages 6860: Antimicrobial Activity of Silver and Gold Nanoparticles Prepared by Photoreduction Process with Leaves and Fruit Extracts of Plinia cauliflora and Punica granatum
Courrol The increased number of resistant microbes generates a search for new antibiotic methods. Metallic nanoparticles have emerged as a new platform against several microorganisms. The nanoparticles can damage the bacteria membrane and DNA by oxidative stress. The photoreduction process is a clean and low-cost method for obtaining silver and gold nanoparticles. This work describes two original insights: (1) the use of extracts of leaves and fruits from a Brazilian plant Plinia cauliflora, compared with a well know plant Punica granatum, and (2) the use of phytochemicals as stabilizing agents in the photoreduction pr...
Source: Molecules - October 13, 2022 Category: Chemistry Authors: Marcia Regina Franzolin Daniella dos Santos Courrol Flavia Rodrigues de Oliveira Silva Lilia Coronato Courrol Tags: Article Source Type: research

Molecules, Vol. 20, Pages 6284-6298: Synthesis, Photophysical Characterization, and Photoinduced Antibacterial Activity of Methylene Blue-loaded Amino- and Mannose-Targeted Mesoporous Silica Nanoparticles
Over the last 20 years, the number of pathogenic multi-resistant microorganisms has grown steadily, which has stimulated the search for new strategies to combat antimicrobial resistance. Antimicrobial photodynamic therapy (aPDT), also called photodynamic inactivation, is emerging as a promising alternative to treatments based on conventional antibiotics. We have explored the effectiveness of methylene blue-loaded targeted mesoporous silica nanoparticles (MSNP) in the photodynamic inactivation of two Gram negative bacteria, namely Escherichia coli and Pseudomonas aeruginosa. For E. coli, nanoparticle association clearly red...
Source: Molecules - April 9, 2015 Category: Chemistry Authors: Oriol PlanasRoger Bresolí-ObachJaume NosThibault GallavardinRubén Ruiz-GonzálezMontserrat AgutSanti Nonell Tags: Article Source Type: research

IJERPH, Vol. 14, Pages 747: Disinfection of the Water Borne Pathogens Escherichia coli and Staphylococcus aureus by Solar Photocatalysis Using Sonochemically Synthesized Reusable Ag@ZnO Core-Shell Nanoparticles
Water borne pathogens present a threat to human health and their disinfection from water poses a challenge, prompting the search for newer methods and newer materials. Disinfection of the Gram-negative bacterium Escherichia coli and the Gram-positive coccal bacterium Staphylococcus aureus in an aqueous matrix was achieved within 60 and 90 min, respectively, at 35 °C using solar-photocatalysis mediated by sonochemically synthesized Ag@ZnO core-shell nanoparticles. The efficiency of the process increased with the increase in temperature and at 55 °C the disinfection for the two bacteria could be achieved in 45 and 60 min, ...
Source: International Journal of Environmental Research and Public Health - July 10, 2017 Category: Environmental Health Authors: Sourav Das Neha Ranjana Ananyo Jyoti Misra Mrutyunjay Suar Amrita Mishra Ashok J. Tamhankar Cecilia St ålsby Lundborg Suraj K. Tripathy Tags: Article Source Type: research

Association of Silver Nanoparticles and Curcumin Solid Dispersion: Antimicrobial and Antioxidant Properties.
The objective of this work was to develop a formulation composed of a thermoresponsive gel-with antimicrobial and antioxidant properties due to the association of AgNps with PVP and PVA polymers. After AgNp synthesis, these were incorporated together with the previously prepared CUR/P407 (1:2) solid dispersion (SD) into a polymer dispersion of 20% P407 (thermosensitive gel). Our results showed that the association between the AgNps with CUR SD demonstrated good antioxidant activity as compared to the standard compound. Measures of MIC showed more efficacy against Gram-negative bacteria (Escherichia coli and Pseudomonas aer...
Source: AAPS PharmSciTech - July 5, 2017 Category: Drugs & Pharmacology Authors: Alves TF, Chaud MV, Grotto D, Jozala AF, Pandit R, Rai M, Dos Santos CA Tags: AAPS PharmSciTech Source Type: research

Molecules, Vol. 28, Pages 6424: Green Synthesis of Silver Nanoparticles Derived from Papaver rhoeas L. Leaf Extract: Cytotoxic and Antimicrobial Properties
Beylerli In the last few decades, the search for metal nanoparticles as an alternative to cancer treatments and antibiotics has increased. In this article, the spectroscopic (ultraviolet–visible (UV-vis), electron-dispersing X-ray (EDX), and Fourier transform infrared (FT-IR)), microscopic (field emission scanning electron microscope (FE-SEM), transmission electron microscope (TEM), and atomic force microscope (AFM)), structural (X-ray diffractometer (XRD) and zetasizer), and analytic (thermogravimetric/differential thermal analyzer (TGA-DTA)) characterization of the silver nanoparticles (AgNPs) produced...
Source: Molecules - September 4, 2023 Category: Chemistry Authors: Polat İpek Re şit Yıldız Mehmet F ırat Baran Abdulkerim Hatipo ğlu Ay şe Baran Albert Sufianov Ozal Beylerli Tags: Article Source Type: research

Molecules, Vol. 21, Pages 731: Biologically Synthesized Gold Nanoparticles Ameliorate Cold and Heat Stress-Induced Oxidative Stress in Escherichia coli
Due to their unique physical, chemical, and optical properties, gold nanoparticles (AuNPs) have recently attracted much interest in the field of nanomedicine, especially in the areas of cancer diagnosis and photothermal therapy. Because of the enormous potential of these nanoparticles, various physical, chemical, and biological methods have been adopted for their synthesis. Synthetic antioxidants are dangerous to human health. Thus, the search for effective, nontoxic natural compounds with effective antioxidative properties is essential. Although AuNPs have been studied for use in various biological applications, explorati...
Source: Molecules - June 3, 2016 Category: Chemistry Authors: Xi-Feng ZhangWei ShenSangiliyandi Gurunathan Tags: Article Source Type: research

Recent advances in antibacterial applications of metal nanoparticles (MNPs) and metal nanocomposites (MNCs) against multidrug-resistant (MDR) bacteria.
Authors: Alavi M, Rai M Abstract INTRODUCTION: In recent years, multidrug-resistance in bacteria has drastically increased and has posed a great threat to the human health. This problem has generated an urgent need to search alternatives for the treatment of MDR bacteria. It has been proved that metal nanoparticles (MNPs) and nanocomposites (MNCs) possess remarkable antimicrobial potential, and hence can be used in alternative therapy. Areas covered: This review is aimed to discuss recent reports on antibacterial activities of MNPs and MNCs against MDR bacteria. Expert opinion: Escherichia coli, Staphylococcus aure...
Source: Expert Review of Anti-Infective Therapy - May 4, 2019 Category: Infectious Diseases Tags: Expert Rev Anti Infect Ther Source Type: research

Investigating the Possibility of Green Synthesis of Silver Nanoparticles Using < em > Vaccinium arctostaphlyos < /em > Extract and Evaluating Its Antibacterial Properties
CONCLUSION: The synthesized nanoparticles showed more antibacterial properties against gram-positive bacteria (Bacillus subtilis and Staphylococcus aureus) than gram-negative ones (Escherichia coli and Salmonella enteritidis).PMID:33997013 | PMC:PMC8110411 | DOI:10.1155/2021/5572252
Source: Biomed Res - May 17, 2021 Category: Research Authors: Sedighe Khodadadi Nafiseh Mahdinezhad Bahman Fazeli-Nasab Mohammad Javad Heidari Baratali Fakheri Abdolhossein Miri Source Type: research

Silver nanoparticles enhance the efficacy of aminoglycosides against antibiotic-resistant bacteria
As the threat of antimicrobial-resistant bacteria compromises the safety and efficacy of modern healthcare practices, the search for effective treatments is more urgent than ever. For centuries, silver (Ag) has been known to have antibacterial properties and, over the past two decades, Ag-based nanoparticles have gained traction as potential antimicrobials. The antibacterial efficacy of Ag varies with structure, size, and concentration. In the present study, we examined Ag nanoparticles (AgNPs) for their antimicrobial activity and safety. We compared different commercially-available AgNPs against gram-negative Escherichia ...
Source: Frontiers in Microbiology - January 31, 2023 Category: Microbiology Source Type: research

Facile green synthesis of non-genotoxic, non-hemolytic organometallic silver nanoparticles using extract of crushed, wasted, and spent Humulus lupulus (hops): Characterization, anti-bacterial, and anti-cancer studies
Environ Res. 2021 Aug 24:111962. doi: 10.1016/j.envres.2021.111962. Online ahead of print.ABSTRACTSince the last few decades, the green synthesis of metal nanoparticles was one of the most thrust areas due to its widespread application. The study proposed using wasted and unusable Humulus lupulus (Hops) extract to synthesize silver nanoparticles for biomedical application. The environment around us gives us many scopes to use the waste from environmental sources and turn it into something valuable. The spent Hops extract was used to synthesize silver nanoparticles (AgNP@HOPs), and the synthesized product exhibited an excel...
Source: Environmental Research - August 27, 2021 Category: Environmental Health Authors: Pratik Das Tanusree Dutta Suvendu Manna Sravanthi Loganathan Piyali Basak Source Type: research

Detection of heavy metals, SERS and antibacterial activity of polyvinylpyrolidone modified plasmonic nanoparticles
Environ Res. 2022 Feb 3:112883. doi: 10.1016/j.envres.2022.112883. Online ahead of print.ABSTRACTSelective and sensitive optical sensor based on surface plasmon resonance for detection of various heavy metals in water using polyvinylpyrolidone modified silver nanoparticles was explained in this present study. The prepared nanoparticles were characterized by UV-visible spectroscopy (UV-vis), Fourier transform infrared spectroscopy (FTIR) and Transmission electron microscopy (TEM). UV-visible spectra show the surface plasmon resonance peak at 409 nm corresponding to silver nanoparticles. Crystalline nature of the nanoparticl...
Source: Environmental Research - February 6, 2022 Category: Environmental Health Authors: S Smonia Joe Princy Joe Sherin C Vijayakumar C Hentry M R Bindhu Khaloud Mohammed Alarjani Nadaa Saeid Alghamidi Dina S Hussein Source Type: research

Interactions of chitosan coated green synthesized silver nanoparticles using mentha spicata and standard antibiotics against bacterial pathogens
CONCLUSIONS: Current findings concluded that chitosan-coated biogenic silver nanoparticles have potential bactericidal effects against infectious pathogens and could be used as forthcoming antibacterial agents.PMID:35382716 | DOI:10.2174/1389201023666220405120914
Source: Current Pharmaceutical Biotechnology - April 6, 2022 Category: Biotechnology Authors: Habib Khan Saiqa Andleeb Tayba Nisar Zahid Latif Sadaf Azad Raja Uzma Azeem Awan Kiran Maqbool Sadia Khurshid Source Type: research