|Clostridium tetani is a pathogenic
bacterium that causes tetanus or "lockjaw". These slides show Clostridium
tetani bacteria that are producing
spores at 1000 X magnification. Stained with methylene blue, the vegetative rods (bacilli) are
dark blue in color and the spores, which do not take up the dye as readily,
are light blue. Clostridium tetani is
known for the "tennis racket" shape it has due to its terminal spores.