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Ultra-Deep High-Fidelity Sequencing Detects Rare Structural Variant Subpopulations in Multidrug-Resistant Pseudomonas aeruginosa from a Left Ventricular Assist Device Infection

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Ultra-deep high-fidelity sequencing of a multidrug-resistant Pseudomonas aeruginosa isolate from a left ventricular assist device driveline infection uncovered rare structural variant subpopulations missed by conventional sequencing. Low-frequency deletions, duplications, and insertion events affected genes linked to pili formation, transport, and stress responses, highlighting hidden genomic diversity with potential implications for resistance, phage susceptibility, and device colonization.
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Maggots as Environmental Indicators of Antibiotic Resistance Gene Distribution and Bacterial Recipients

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Antibiotic resistance genes (ARGs) are emerging environmental pollutants that can spread through insect populations. This study demonstrates that maggots from farms, ponds, hospitals, and waste sites commonly harbor tetA, sul2, amp, and km genes. Soil and food were key ARG sources, while plasmid-mediated transfer occurred within maggots, with Providencia species identified as major recipient bacteria.
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MrhbtA Transcription Factor Controls Hyphal Branching and Azaphilone Pigment Production in Monascus ruber

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A novel C2H2-type zinc finger transcription factor, MrhbtA, was identified as a central regulator of hyphal branching and azaphilone pigment production in Monascus ruber M7. Gene deletion reduced branching and pigment yields, while overexpression increased branch formation by 40% and boosted pigment production. Genomic target analysis revealed regulation of genes involved in cell wall organization and cell cycle control.
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Accessory Plasmid Region Linked to Camptothecin Metabolism in Rhizosphere Sphingobium Lineages

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Plant-associated Sphingobium strains were found to transform the anticancer alkaloid camptothecin and related analogs. Comparative genomics identified a 97.8-kb plasmid accessory region, GAP2, that is present in transforming strains but absent in a non-transforming derivative. Transcriptomic, genetic, and biochemical evidence points to oxygenation and ring-cleavage genes within this region as key contributors to camptothecin transformation.
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Acinetobacter Distribution, Antibiotic Resistance Associations, and Genomic Diversity Across an Urban Wastewater Network

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Researchers monitored Acinetobacter across hospital, student residence, and wastewater treatment plant locations using 300 wastewater samples collected over 18 months. The genus was consistently abundant, declined substantially during treatment, yet persisted in effluent. Genomic analyses revealed lineage diversity, multiple OXA beta-lactamase variants, and significant associations with antibiotic resistance gene abundance.
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Mucin Enhances Bacteriophage Replication and Alters Biofilm Formation in Enteropathogenic Yersinia enterocolitica

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Researchers examined interactions between enteropathogenic Yersinia enterocolitica O:8 and its mucus-adherent bacteriophage in a simulated mucosal environment. Mucin exposure increased phage replication by approximately 100-fold, altered infection dynamics, and reduced bacterial biofilm formation. Resistant mutants acquired mutations affecting virulence, quorum sensing, and antibiotic resistance pathways, highlighting mucin's role in phage-bacterium ecology.
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How Sequencing Biases Shape Microbial Ecology Networks in the Cinnamomum migao Rhizosphere and Phyllosphere

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This study examines how different sequencing methods influence microbial community analysis in the rhizosphere and phyllosphere of Cinnamomum migao. Variations in annotation resolution, microbial domain, and quantification significantly altered network parameters and keystone taxa identification, highlighting the need for careful interpretation of microbial interactions.
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