Antimicrobial activity – Page 13

Synergistic Effects of Cold Atmospheric Multiple Plasma Jet and Amphotericin B on Leishmania major: An In-Vitro Study

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Researchers tested a new cold plasma technology combined with an existing anti-parasite drug (amphotericin B) against Leishmania parasites that cause skin infections. The cold plasma, which contains reactive chemicals, killed the parasites by triggering their programmed cell death (apoptosis) while causing minimal harm to human immune cells. When combined with the medication, the treatment was even more effective, potentially allowing lower drug doses with fewer side effects.

Influence of Pleurotus sapidus fruiting bodies on the performance, cecal microbiome, and gene expression in the liver and breast muscle of broilers

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Researchers tested whether edible mushroom fruiting bodies could be used as animal feed for chickens. They found that chickens fed diets containing oyster mushroom (Pleurotus sapidus) had reduced growth and lower nutrient absorption compared to control chickens. While mushroom-based feed appeared to increase beneficial gut bacteria diversity, it ultimately impaired overall chicken performance, suggesting mushroom fruiting bodies are not suitable as a primary feed component for commercial poultry production.

Extracellular Biosynthesis, Characterization and Antimicrobial Activity of Silver Nanoparticles Synthesized by Filamentous Fungi

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Researchers used three types of fungi to naturally create tiny silver particles that can kill harmful bacteria and fungi. These particles were much smaller than the width of a human hair and proved especially effective against dangerous bacteria like those causing hospital infections and Candida yeast infections. This green manufacturing method is safer for the environment than traditional chemical approaches and could help address the growing problem of drug-resistant infections.

Antimicrobial and Antifungal Activities of Proline-Based 2,5-Diketopiperazines Occurring in Food and Beverages and Their Synergism with Lactic Acid

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Researchers synthesized special cyclic peptides called 2,5-diketopiperazines (found naturally in fermented foods like bread and cheese) and tested their ability to kill harmful molds and bacteria. When combined with lactic acid (a natural preservative), these compounds worked extremely well together, achieving nearly complete mold inhibition. This research suggests that using special starter cultures that naturally produce these compounds could help keep food fresh longer without artificial preservatives.

A New Species and Five New Records of Talaromyces (Eurotiales, Aspergillaceae) Belonging to Section Talaromyces in Korea

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Researchers surveying fungal diversity in Korea discovered one new species of Talaromyces fungus and confirmed five additional species previously unknown to the country. These fungi were isolated from soil, freshwater, and indoor air samples and identified using genetic analysis and visual characteristics. Many species in this fungal genus produce valuable compounds with potential medical and agricultural applications, making them important for biotechnology research.

Antagonistic potential and analytical profiling of plant probiotic bacteria using chromatography and mass spectrometry techniques against Botrytis cinerea and Fusarium oxysporum

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Researchers discovered that certain beneficial bacteria can fight plant diseases caused by harmful fungi. Two bacteria strains showed exceptional ability to inhibit the growth of disease-causing fungi that damage crops. These bacteria produce natural compounds like phenols and organic acids that help plants grow better and resist diseases. This research suggests these bacteria could be used as natural alternatives to chemical pesticides for sustainable farming.

Packaging of Fresh Sliced Mushrooms with Essential Oils Vapours: A New Technology for Maintaining Quality and Extending Shelf Life

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Researchers developed a new packaging method for sliced mushrooms that uses essential oil vapors combined with modified atmosphere packaging to keep them fresh longer. The treatment with essential oils from eugenol, bergamot, and grapefruit prevented browning and slowed bacterial growth, allowing packaged mushrooms to stay fresh and appealing for about 12 days at refrigeration temperature. This is significantly longer than untreated mushrooms which became unacceptable after just 5 days. The method works naturally without synthetic chemicals and could help reduce food waste from mushroom spoilage.

Glucose-6-Phosphate Dehydrogenase Modulates Shiraia Hypocrellin A Biosynthesis Through ROS/NO Signaling in Response to Bamboo Polysaccharide Elicitation

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Researchers discovered that a specific enzyme called glucose-6-phosphate dehydrogenase (G6PDH) controls the production of hypocrellin A, a powerful therapeutic compound found in Shiraia fungi. When bamboo polysaccharides are added to fungal cultures, they trigger G6PDH activity, which then increases the production of signaling molecules that boost hypocrellin A biosynthesis. This finding could lead to better ways to produce this promising cancer-fighting photosensitizer at industrial scales using simple, cost-effective methods.

Endophytic Alternaria alternata Culture-Derived Elicitor Promotes Growth and Antibacterial Activity in Kalanchoe laetivirens

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Researchers cultivated medicinal Kalanchoe plants in controlled laboratory conditions and exposed them to a powdered form of a beneficial fungus (Alternaria alternata). The plants treated with this fungal extract grew larger, developed more roots, and produced greater amounts of antibacterial compounds compared to untreated plants. The treated plants were especially effective at stopping the growth of two common disease-causing bacteria (E. coli and S. aureus). This approach could lead to more efficient production of plant-based medicines.

Genome-Mining Based Discovery of Pyrrolomycin K and L from the Termite-Associated Micromonospora sp. RB23

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Researchers discovered two new antimicrobial compounds called pyrrolomycins from a bacterium found in termite guts using genome analysis and advanced chemistry techniques. These compounds are modified versions of known antimicrobial molecules, featuring halogenated structures. Interestingly, the bacteria appears to protect itself from its own toxic compounds through chemical modifications, a strategy that researchers believe could inform the design of new antibiotics to combat drug-resistant bacteria.

therapeutic action: Antimicrobial activity