This 1966 transmission electron microscope image provided by the Centers for Disease Control and Prevention shows a Listeria bacterium with its flagella, in the process of cell division. (Graham ...

This 2002 electron microscope image made available by the Centers for Disease Control and Prevention shows a Listeria monocytogenes bacterium.

Lab manager Hannah Turner holds grids, a single one used to hold a sample, placed into the Titan Krios electron microscope at Scripps Research Institute in La Jolla on Friday, April 11, 2025.