Comparative analysis of antibacterial activities of Xenorhabdus species on related and non-related bacteria in vivo.

Insect-nematode-bacterium mutualistic associations provide attractive systems for discovery of inter kingdom signal compounds and antibiotics. A better understanding of the biological meaning of the inter-specific diversity of compounds with antimicrobial activity of the Steinernema -symbiont Xenorhabdus bacteria may provide options for simultaneous applications in pathogen control. Anti-bacterial activities of representative strains of Xenorhabdus budapestensis, Xenorhabdus szentirmaii, Xenorhabdus innexi, Xenorhabdus ehlersii , Xenorhabdus nematophila, Xenorhabdus bovienii and Xenorhabdus cabanillassii were tested on non-related ( Escherichia coli , Klebsiella pneumoniae , Staphylococcus aureus ) bacteria and on each other by previously published bioassays. All active compounds were adsorbed by Amberlite