Diversity of locust gut bacteria protects against pathogen invasion

By Rod Dillon, C. Vennard, Angus Buckling, A. Charnley. 2005

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Infectious diseases in wildlife: the community ecology context (2007, background): “Similarly, recent work in locusts suggests that higher species richness in gut microbiota is associated with decreased ability of pathogens to colonize the gut (Dillon et al. 2005).”
The gut microbiota of insects - diversity in structure and function. (2013, background): “In experiments conducted with the desert locust Schistocerca gregaria, an inverse relationship between gut community diversity and the colonization success of the pathogen Serratia marcescens was observed (Dillon et al., 2005).”
Animal behaviour meets microbial ecology (2011, background): “…bacterial communities help them extract energy and nutrients from food (Nalepa 1994; Ley et al. 2008), produce vitamins (Hill 1997), fight pathogens (Fons et al. 2000; Dillon et al. 2005; Ruiz-Rodríguez et al. 2009) and train the immune system (Umesaki et al. 1999; Macpherson & Harris 2004).”
Socially transmitted gut microbiota protect bumble bees against an intestinal parasite (2011, background): “Possible mechanisms for the reduction in parasite load may be increased competition for resources in the gut by the presence of gut microbiota (8) or the production of antimicrobial substances by the bacteria (14, 31).”