Abstract
Photorhabdus is a genus of enterobacterial symbionts of Heterorhabditis, a genus of entomopathogenic nematodes. These two associated organisms are capable of infecting a wide range of arthropods, from insects to isopods and even ticks. The genome of Photorhabdus luminescens TT01 has been completely sequenced and so are the genomes of two other species of the genus, P. asymbiotica and P. t…