These included GNBP-3 that was highly expressed by axenic and symbiotic nematodes at both time-points and by Photorhabdus at 12 h post-infection, PGRP-SA and PGRP-SD that were upregulated by symbiotic nematodes at 30 h and Photorhabdus at 12 h, and PGRP-LD that was downregulated by all pathogens at both time-points. This evidence concerns the gene PGLYRP1 and infection.