Metagenomics
Metagenomics means sequencing DNA from the entire community of microbes in a sample, not just isolated strains. The 2025 study used it to profile bacteria in household dust, revealing how diverse communities shift with chemical exposure.
Metagenomics is the whole-community genetic sequencing technique used to analyze DNA from all microorganisms in an environmental sample, bypassing the need for individual isolation. It profiles entire microbial ecosystems, including bacteria, fungi, and viruses, to reveal taxonomic composition and functional potential. This approach is essential for studying complex environments like soil, water, or dust where most organisms cannot be cultured in labs.
What this means in real life
A researcher collects soil from a forest, extracts all DNA present, and sequences it to discover which bacteria and fungi live there and what genes they carry—without needing to grow any of them in petri dishes.
What it isn’t
It is not simply identifying one organism's genome. Rather, it reconstructs the genetic blueprint of entire mixed communities at once, revealing species that cannot be cultured and would remain invisible under traditional microbiology methods.
Commonly misused online
Often conflated with 'DNA barcoding' or treated as synonymous with 'microbiome analysis,' when it is actually a broader toolkit that can reveal function and diversity beyond simple species identification.