Bacterial structures - basic principle

Bacterial capsule Capsule Bacterial cell Capsule is a polysaccharide, protective layer outside the cell wall; the background and the bacterium pick up the dye and appear darker; capsule does not pick up the dye and appears lighter halo around the bacterial cel

Bacterial endospore Subterminal endospore Central endospore Terminal endospore Endospore is a dormant, tough, no-reproductive structure produced by some bacteria to survive during extreme environmental conditions

Bacterial flagella Hair-like structure that helps in the movement of bacterium; made of helical protein (flagellin) attached to the basal body for rotary movement Flagella covering the entire bacterial surface A single flagellum at each end Single flagellum

Motility test