Recovery and microbial host assignment of mobile genetic elements in complex microbiomes: insights from a spiked gut sample.
Bloemen B, Delvoye M, Hoffman S, Marchal K, Vanneste K
Soil Health
Same antibiotic resistance spreading in human gut bacteria can also move into soil and plant microbiomes, threatening the safety of the vegetables and fruits you grow or buy.
Bacteria can pass genetic 'instruction packets' to each other, including ones that make them resistant to antibiotics. Researchers tested three clever techniques to figure out exactly which bacteria are holding and sharing these packets in a complex microbial community. While no single method worked perfectly on its own, combining all three gave scientists a much clearer picture of how resistance spreads.
Key Findings
Nanopore adaptive sampling successfully increased detection of low-abundance bacteria and mobile genetic elements that would otherwise be missed in complex microbial communities.
DNA methylation patterns and Hi-C sequencing (which links DNA fragments physically close together in a cell) could both independently identify which host bacterium carried a given mobile genetic element.
All three methods require careful experimental design and validation — none are plug-and-play — but together they enable comprehensive tracking of gene transfer dynamics in complex environments.
chevron_right Technical Summary
Scientists developed new methods to track how antibiotic resistance genes spread between bacteria in the gut by identifying which specific microbes are carrying and sharing these dangerous genetic elements.
Abstract Preview
Mobile genetic elements (MGEs) are major drivers of horizontal gene transfer, including the spread of antimicrobial resistance (AMR) genes. However, determining the microbial host of an MGE in comp...
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