Swarming bacterial populations can exhibit antibiotic resistance, despite sustaining considerable cell death. Here, Bhattacharyya et al. show that killed cells release periplasmic protein AcrA, which activates efflux pumps on the surface of live cells, thus enhancing antibiotic resistance in the surviving cells.
- Souvik Bhattacharyya
- David M. Walker
- Rasika M. Harshey
