We would like to draw your attention to a paper published by Denis Voronin, et. al on the influence of host metabolism on symbiont fitness:
Denis Voronin , Saheed Bachu, Michael Shlossman, Thomas R. Unnasch, Elodie Ghedin, Sara Lustigman “Glucose and Glycogen Metabolism in Brugia malayi Is Associated with Wolbachia Symbiont Fitness”, PLoS One. 2016 Apr 14;11(4):e0153812. doi: 10.1371/journal.pone.0153812. eCollection 2016.