Fig. 5From: Experimental Listeria–Tetrahymena–Amoeba food chain functioning depends on bacterial virulence traitsTransmission electron micrographs of A. proteus digestive vacuoles. A. proteus grazed on intact T. pyriformis (a), or on T. pyriformis fed with L. monocytogenes (b–d) or L. innocua (e, f). Arrows indicate bacteria, arrowhead indicate cilia which are parts of T. pyriformis. Bars represent 10 µm (a); 5 µm (b, c), 1 µm (d–f)Back to article page