LactobacillusAcidophilusSEM.jpg

close up of Lactobacillus acidophilus: bacteria shaped like long gray tubes against a black background

Image by Mogana Das Murtey and Patchamuthu Ramasamy, Wikimedia Commons / CC BY-SA 3.0

Lactobacillus acidophilus, Scanning Electron Microscopy (SEM) image