Another battle won in the phage-host arms race: Pseudomonas phage blocks quorum sensing regulator LasR.

Shah et al. (2021) uncover phage-encoded protein Aqs1 that tactically blocks Pseudomonas aeruginosa quorum-sensing receptor LasR immediately upon infection to counteract the host's quorum-sensing program, a defense strategy that is likely conserved in other phages.