An<unk>  is a dormant, tough, and non-reproductive structure produced by a small number of bacteria from the Firmicute phylum. The primary function of most<unk> s is to ensure the survival of a bacterium through periods of environmental stress. They are therefore resistant to ultraviolet and gamma radiation, desiccation, lysozyme, temperature, starvation, and chemical disinfectants.<unk> s are commonly found in soil and water, where they may survive for long periods of time. Some bacteria produce exospores or cysts instead.
Endospore
Nucleosol
Biofilm
Vector
Vector 
Hydrophobe
Dermatophyte
Gametocyte