Fighting for Resources: Who Started the Battle? Who Is Winning It?

Several vacuolar bacteria and parasites, such as Legionella , Chlamydia , and Toxoplasma , have been reported to grow associated with host mitochondria. The reason behind this phenomenon remains elusive. In this issue of Cell Metabolism , Pernas et al. (2018) propose that fusion of host mitochondria limits the availability of fatty acids needed for Toxoplasma gondii replication.