The invention relates to the production of phage and non-replicative transduction particles using DNAs (eg, plasmids and helper phage, mobile genetic elements (MGEs) or plasmids with chromosomally integrated helper phage genes), as well as the phage, helper phage, kits, compositions and methods involving these. The non-replicative transduction particles can be used to deliver antibacterial agents comprising a guided nuclease system.
