Publication date: Sep 05, 2026
The research demonstrates that drying of Mycobacterium tuberculosis respiratory droplets induces DNA damage in the bacteria, primarily through oxidative stress and double-stranded DNA breaks. This desiccation process activates DNA repair mechanisms, allowing bacteria to survive and increasing genetic diversity. Specifically, the study revealed a 50- to 100-fold increase in rifampicin-resistant mutants following drying, linked to the enhanced activity of the Mfd repair factor. Analysis of clinical strains confirmed a relative enrichment of the H445Y resistance mutation among those with mfd mutations, highlighting the role of desiccation in driving the evolution of antibiotic resistance during airborne transmission.
| Concepts | Keywords |
|---|---|
| Dying | Antibiotic |
| Mutants | Bacteria |
| Mycobacterium | Damage |
| Rehydration | Desiccation |
| Rich | Drug |
| Drying | |
| Found | |
| Genetic | |
| Mfd | |
| Mutation | |
| Repair | |
| Resistance | |
| Strains | |
| Transmission | |
| Tuberculosis |
Semantics
| Type | Source | Name |
|---|---|---|
| pathway | REACTOME | DNA Repair |
| drug | DRUGBANK | Water |
| drug | DRUGBANK | Medical air |
| pathway | KEGG | Tuberculosis |
| disease | MESH | tuberculosis |
| drug | DRUGBANK | Rifampicin |
| disease | MESH | strains |