Bacteria able to hitchhike a ride on a protozoan was just too interesting an article to pass by. Listeria monocytogenes and different bacterial strains were microscopically studied and some were observed forming a backpack on the surface of Acanthamoeba. Results demonstrated that having a flagella alone is not sufficient they must have motility in order to accumulate on protozoan surface.
However, in a few hours they are engulfed and dead. This research clearly shows the likelihood of being afflicted with both pathogens is unlikely due to protozoan slaying its free rider.
Original Article: Doyscher D, Fieseler L, Dons L, Loessner M, and Schuppler M. (2013). Acanthamoeba feature a unique backpacking strategy to trap and feed on Listeria monocytogenes and other motile bacteria Environ Microbio 15:433–446.
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