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致病杆菌属(Xenorhabdus)及近缘的发光杆菌属(Photorhabdu)是昆虫病原线虫肠道共生菌。共生菌被线虫释放到寄主血腔中后,能导致昆虫迅速死亡,且产生抗菌成分防止虫尸腐烂[1]。由于从土壤或水源中未能分离到自由存活的共生细菌,因此早期认为这类细菌只有在与线虫共生状态下
Xenorhabdus and its neighboring Photorhabdu are entomopathogenic nematode commensal bacteria. Symbiotic bacteria released by the nematodes to the host blood cavity, can cause rapid death of insects, and produce antibacterial ingredients to prevent insect necrosis [1]. Because of the inability to isolate free-living symbiotic bacteria from soil or water, it was early thought that such bacteria were only found in symbiosis with nematodes