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Bacteria are considered the first links of food chains as they contribute significantly to primary productivity and are the main nutritional source for many larval and adult invertebrates.These invertebrates also serve as substrate for bacterial colonization,provide a stable environment for bacterial proliferation and are mechanisms for microbial transfer and pathogen transmission.Recent studies have shown an intimate communication between bacteria and their insect hosts and have uncovered important bacterial function in host fitness,behavior and immunity.With the growing application of invertebrates as protein sources and as tools for the recycling of bio-waste,there is an urgent need to understand bacterial-insect relationships including bacterial community structure and function,partitioning of bacteria within the insect,modulation of insect behavior,and pathogen amplification and transfer.This presentation will highlight functional contributions by microbial consortia to insect physiology and fitness,outline mechanisms involved in the establishment of microbe-insect associations,and present data from an insect-pathogen model for pathogen partitioning and transmission.Finally,this presentation will discuss potential application and exploitation of these relationships in future research toward the development of new methods to facilitate more efficient biodegradation and to increase the nutritional value of edible insects.