Whooping Cough Evolves to Beat Antibiotics in Global Hub

Pertussis, commonly known as whooping cough, remains a serious public health concern despite widespread vaccination programmes. A new study focused on Yiwu, China—a highly mobile international city—provides worrying insights into how the bacterium Bordetella pertussis is evolving to survive medical intervention.

Researchers performed whole-genome sequencing on 63 clinical isolates from the region. The results were striking: over 90 per cent of the samples demonstrated high resistance to macrolides, the primary class of antibiotics used to treat the infection. By comparing these samples with international strains, the team identified a specific genetic mutation—an A2037G substitution in the 23S rRNA gene—strongly linked to this resistance.

Furthermore, the study detected mutations in genes coding for outer membrane efflux proteins, which may enhance the bacteria's defence mechanisms. The phylogenetic analysis revealed distinct evolutionary lineages and variations in genes targeted by current vaccines. These findings suggest that B. pertussis is undergoing localised evolution, underscoring the critical need for continuous genomic surveillance and the development of alternative therapies.